KR100209851B1 - Method and device for reproducing data having navigation data - Google Patents

Abstract

In the recording medium, the video data is compressed into a pack defined in MPEG, and stored in the video object unit as a pack sequence to be reproduced within a predetermined time. The video object unit includes a navigation pack arranged at the head of the pack sequence. The navigation pack, characterized in that the video object units are arranged so that data cells are arranged, the reproduction information for reproducing the video object unit and the search information for searching for other video object units are described. Further, data cells are arranged to form a video object, and reproduction information described about the reproduction order of the cells is described in the recording medium as a table.

Description

Method and apparatus for reproducing reproduction data with navigation data

1 is a block diagram showing an outline of an optical disk apparatus according to an embodiment of the present invention.

FIG. 2 is a block diagram showing details of the mechanism part of the disk driver apparatus shown in FIG.

3 is a perspective view schematically showing the structure of an optical disk loaded in the disk driver apparatus shown in FIG.

FIG. 4 is a diagram showing the structure of the logical format of the optical disc shown in FIG.

FIG. 5 is a diagram showing the structure of the video manager shown in FIG.

FIG. 6 is a diagram of FIG. 5 and shows the structure of a video object set (VOBS).

FIG. 7 shows the structure of the video object unit shown in FIG. 6. FIG.

FIG. 8 is a diagram showing parameters and contents of the volume manager information management table (VMGI-MAT) in the video manager (VMGI) shown in FIG.

FIG. 9 shows the structure of the title search pointer table TSPT in the video manager VMGI shown in FIG.

FIG. 10 is a diagram showing parameters and contents of information TSPTI of the title search pointer table of the title search pointer table TSPT shown in FIG.

FIG. 11 is a diagram showing parameters and contents of a title search pointer TT_SRP corresponding to an input number of the title search pointer table TSPT shown in FIG.

FIG. 12 is a diagram showing the structure of a video title set shown in FIG. 4. FIG.

FIG. 13 is a diagram showing parameters and contents of a management table (VTSI_MAT) of video title set information of video title set information (VTSI) shown in FIG.

FIG. 14 is a diagram showing the structure of a table VTS_PGCIT of video title set program chain information of video title set information VTSI shown in FIG.

FIG. 15 is a diagram showing parameters and contents of information VTS_PGCITI of the table VTS_PGCIT of the video title set program chain information shown in FIG.

FIG. 16 is a diagram showing parameters and contents of a search pointer VTS_PGCIT_SRP corresponding to the program chain of the table of video title set program chain information VTS_PGCIT shown in FIG.

FIG. 17 is a diagram showing the structure of program chain information VTS_PGCI in a video title set corresponding to the program chain of the table of video title set program chain information VTS_PGCIT shown in FIG.

FIG. 18 is a diagram showing parameters and contents of the general information PGC_GI of the program chain of the program chain information VTS_PGCI shown in FIG.

FIG. 19 is a diagram showing the structure of a map PGC_PGMAP of the program chain of the program chain information VTS_PGCI shown in FIG.

FIG. 20 is a diagram showing parameters and contents of an entry cell number ECELLN for a program described in a map PGC_PGMAP of the program chain shown in FIG.

FIG. 21 is a diagram showing the structure of the cell reproduction information table C_PBIT of the program chain information VTS_PGCI shown in FIG.

FIG. 22 is a diagram showing parameters and contents of the cell reproduction information table C_PBIT shown in FIG.

FIG. 23 is a diagram showing the structure of cell position information C_POSI of program chain information VTS_PGCI shown in FIG.

FIG. 24 is a diagram showing parameters and contents of cell position information (CPOSI) shown in FIG.

FIG. 25 is a diagram showing the structure of a navigation pack shown in FIG.

FIG. 26 is a diagram showing the structure of a video, audio and sub-picture pack shown in FIG.

FIG. 27 is a diagram showing parameters and contents of reproduction control information (PCI) of the navigation pack shown in FIG.

FIG. 28 is a diagram showing parameters and contents of general information (PCI_GI) in the reproduction control information (PCI) shown in FIG. 27;

FIG. 29 shows parameters and contents of angle information NSLS_ANGLI in reproduction control information PCI shown in FIG. 27; FIG.

30 is an explanatory diagram when an angle is changed by using angle information NSLS_ANGLI in reproduction control information PCI shown in FIG. 29;

FIG. 31 is a diagram showing parameters and contents of the disk search information (DSI) of the navigation pack shown in FIG. 26;

FIG. 32 is a diagram showing parameters and contents of DSI general information (DSI_GI) of the disc search information (DSI) shown in FIG. 31;

FIG. 33 is a diagram showing parameters and contents of angle information SML_SI of the disc search information DSI shown in FIG.

FIG. 34 is an explanatory diagram when an angle is changed using the angle information SML_SI in the disc search information DSI shown in FIG.

35A is a diagram showing parameters of search information (VOB_SI) of the video object (VOB) shown in FIG. 31, and their contents.

35B shows a bit map describing a forward address BWDA of search information VOB_SI of the video object VOB shown in FIG. 31. FIG.

FIG. 35C shows a bit map describing a backward address FWDA of search information VOB_SI of the video object VOB shown in FIG. 31;

FIG. 36 shows parameters of the synchronous reproduction information SYNCI of the video object VOB shown in FIG. 31, and their contents.

37A, 37B, 38, and 39 are flowcharts showing the procedure for reproducing video data in the normal mode in the optical disc having the logical format shown in FIGS.

40 is a flowchart showing a procedure for changing an angle during reproduction of video data in the optical disc having the logical format shown in FIGS.

FIG. 41 is a flowchart showing the procedure of interrupt processing during reproduction of video data in the optical disc having the logical format shown in FIGS.

42A to 42D are flowcharts showing a procedure relating to one example of fast search processing of video data in the optical disc having the logical format shown in FIGS.

43 is a flowchart showing a procedure related to another example of the fast search process of video data in the optical disc having the logical format shown in FIGS.

FIG. 44 is a flowchart showing a procedure of reproducing video data after a predetermined time has elapsed in the optical disc having the logical format shown in FIGS.

45 is a block diagram showing an encoder system for generating video files by encoding video data.

FIG. 46 is a flowchart showing an encoding process shown in FIG. 45. FIG.

FIG. 47 is a flowchart for creating a file of image data by combining main image data, audio data and sub-image data encoded in the sequence shown in FIG. 46;

FIG. 48 is a block diagram showing a system of a disc formatter for recording a formatted image file to an optical disc. FIG.

FIG. 49 is a flowchart for creating logical data for recording on a disc in the disc formatter shown in FIG. 48;

50 is a flowchart for creating physical data for recording from logical data to a disk.

FIG. 51 is a schematic diagram showing a system for transmitting the video title set shown in FIG. 4 through a communication system. FIG.

* Explanation of symbols for main parts of the drawings

4: Key operation display part 6: Monitor part

10: optical disc 30: disc drive inside

50: system CPU unit 52: system ROM / RAM unit

54: system processor unit 56: data RAM unit

58: video decoder 60: audio decoder

62: sub-picture decoder 58A, 60A, 62A: system time clock

The present invention provides a recording medium on which data with navigation data is recorded, a method and apparatus for reproducing data according to navigation data, a method and apparatus for recording data with navigation data on a recording medium, and navigation data. The present invention relates to a system for transmitting data through a communication system.

Although generally known compact discs, so-called CDs, have already been developed, such optical discs are not easy to record and reproduce movie data for a long time in terms of their storage capacity. In view of this, optical discs capable of recording movie data with high density have been researched and developed.

In recent years, the data compression method for moving pictures has been internationalized as MPEG (Moving Picture Image Coding Expert Group) method. This MPEG method is known as a method of variable compression of video data. In addition, the MPEG2 system is currently proposed, and this system is internationalized, and accompanying this, the system format corresponding to the MPEG2 compression system is also defined as the MPEG2 system layer. In this MPEG2 system layer, it is prescribed to set a transmission start time and a reproduction time in which each data is expressed using a reference time so that a moving picture, an audio, and its data can be synchronously transmitted or reproduced.

However, the information on the transmission start time and the playback start time alone is not a problem for normal playback. However, playback processing such as special playback such as fast forwarding or rewinding playback, or interactivity is made difficult for the system.

SUMMARY OF THE INVENTION An object of the present invention is to provide a recording medium on which data including navigation data for navigating data capable of special playback such as fast forward or rewind playback is recorded.

It is also an object of the present invention to provide a method for reproducing information along with navigation data from a recording medium on which data has navigation data for navigating data capable of special playback such as fast forward or rewind playback, and a playback apparatus thereof. Is in.

It is also an object of the present invention to provide a method of recording data having navigation data for navigating data capable of special playback such as fast forward or rewind playback, and a recording apparatus thereof. It is also an object of the present invention to provide a communication system for transmitting navigation data for navigating data capable of special playback such as fast forward or rewind playback, together with playback data, through a communication system.

According to the present invention, a plurality of data units which become reproduction objects in time series and each of which are to be reproduced within a predetermined time range, wherein the data units include at least one of audio, video and sub-pictures. Composed of a plurality of data pack strings compressed and packetized reproduction data, and a navigation pack disposed at the head of the data pack string, and containing navigation information describing the reproduction information of the data pack and the relationship with other data units, A recording medium having navigation data for reproducing data reproduced based on this navigation information is provided.

Further, according to the present invention, a plurality of data units which become objects to be reproduced in time series, each of which is to be reproduced within a predetermined time range, wherein the data units are capable of at least one of audio, video and sub-pictures. Composed of a plurality of data pack strings compressed and packetized to be included, and a navigation pack disposed at the head of the data pack sequence and containing navigation information describing the reproduction information of the data pack and the relationship with other data units. A method of reproducing reproduction data having navigation data comprising receiving reproduction data, converting a data unit into a reproduction signal with reference to the navigation information of the reproduction data, and reproducing the reproduction signal Is provided.

Further, according to the present invention, a plurality of data units which are to be reproduced objects in time series, each of which is to be reproduced within a predetermined time range, wherein the data units contain at least one of audio, video and sub-pictures. Composed of a plurality of data pack strings compressed and packetized to be included, and a navigation pack disposed at the head of the data pack sequence and containing navigation information describing the reproduction information of the data pack and the relationship with other data units. Means for extracting the reproduction data from the recording medium on which the reproduction data is recorded; and means for converting the unit into a reproduction signal by referring to the navigation information of the retrieved reproduction data to reproduce the reproduction signal; An apparatus for reproducing reproduction data is provided.

According to the present invention, there is provided a method of preparing a plurality of data packs, each of which is compressed and packetized playback data including at least one of audio, video, and sub-pictures; A navigation pack that comprises a data unit in units of data packs to be reproduced within a certain time range, and which contains navigation information describing the reproduction information of the data pack and a relationship with other data units at the head of the data unit. Preparing a plurality of data units provided with; There is provided a method of recording reproduction data on a recording medium, comprising recording the data unit on a recording medium so as to be reproducible in time series.

According to the present invention, there is also provided a device, comprising: means for compressing playback data including at least one of audio, video, and sub-picture to generate a plurality of packetized data packs; A navigation pack that comprises a data unit in units of data packs to be reproduced within a certain time range, and which contains navigation information describing the reproduction information of the data pack and a relationship with other data units at the head of the data unit. Means for preparing a plurality of data units provided with; An apparatus is provided for recording reproduction data having navigation data comprising means for recording the data unit on a recording medium so that the data unit can be reproduced in a time series.

In addition, according to the present invention, a plurality of data units which become objects to be reproduced in time series and each of which is to be reproduced within a predetermined time range, wherein the data units contain at least one of audio, video and sub-pictures. Composed of a number of data packs of compressed and packetized data packs, and a head of the data pack strings, which contain navigation information describing the data pack playback information and relationships with other data units. Means for generating regenerated data; There is provided a communication system for transmitting reproduction data with navigation data consisting of means for transmitting a data unit at the head of a navigation pack.

Further, according to the present invention, a plurality of data cells whose order of reproduction can be specified, each data cell of which is to be reproduced in succession in time series, each of which must be reproduced within a certain time range. A plurality of data pack sequences in which the data unit compresses and packetizes reproduction data including at least one of audio, video, and sub-picture, and a first reproduction relating to reproduction of the data unit at the head thereof. A recording medium is provided having a data cell composed of a navigation pack in which information is described and navigation data composed of a table in which second reproduction information relating to reproduction of each data cell is described.

Further, according to the present invention, there is provided a method comprising: acquiring contents of a table in which reproduction information relating to reproduction of data cells is described; A step of acquiring data cells successively and converting them into a reproduction signal by referring to the description of this table, wherein each data cell becomes a reproduction object in successive time series, each of which a plurality of data to be reproduced within a predetermined time range. As a set of units, a plurality of data pack sequences in which the data unit compresses and packetizes reproduction data including at least one of audio, video and sub-pictures, and at the head thereof, first reproduction information relating to reproduction of the data unit A conversion step consisting of a navigation pack described; A method of reproducing reproduction data having navigation data comprising reproducing a reproduction signal is provided.

Further, according to the present invention, as a plurality of data cells capable of designating the reproduction order, each data cell becomes a reproduction object in succession in time series, and each of the plurality of data units to be reproduced within a predetermined time range. As a set, a plurality of data pack sequences obtained by compressing and packetizing reproduction data including at least one of audio, video, and sub-pictures, the data unit of which first reproduction information relating to reproduction of the data unit is described. A data cell comprising a navigation pack; Means for converting a data cell from a recording medium into a reproduction signal comprising a table in which the second reproduction information relating to reproduction of each data cell is described and means for receiving and storing the second reproduction information of the table from the recording medium. and; There is provided an apparatus for reproducing from a recording medium having a navigation pack composed of means for transmitting data cells to said converting means in accordance with stored reproduction information.

According to the present invention, there is provided a method of preparing a plurality of data packs, each of which is compressed and packetized playback data including at least one of audio, video, and sub-pictures; A navigation pack that comprises a data unit in units of data packs to be reproduced within a certain time range, and which contains navigation information describing the reproduction information of the data pack and a relationship with other data units at the head of the data unit. Preparing a plurality of data units provided with; Arranging the plurality of data units so that they can be reproduced in time series, and creating a plurality of data cells capable of designating the reproduction order thereof; Creating a table in which reproduction information relating to reproduction of each data cell is described; There is provided a method of recording reproduction data with navigation data consisting of the step of recording the plurality of data cells on a recording medium following this table.

In addition, according to the present invention, there is provided an apparatus, comprising: means for generating a plurality of data packs by compressing playback data including at least one of audio, video and sub-pictures into a packet; Means for constructing a data unit in units of data packs to be reproduced within a predetermined time range, and preparing a plurality of data units; Means for arranging the plurality of data units so that they can be reproduced in time series, and for creating a plurality of data cells capable of designating the reproduction order thereof; Means for creating a table in which reproduction information relating to reproduction of each data cell is described; Subsequently to this table, there is provided an apparatus for recording reproduction data having navigation data comprising means for recording the plurality of data cells on a recording medium on a recording medium.

Further, according to the present invention, a plurality of data cells whose order of reproduction can be specified, each data cell being consecutively reconstructed in time series, each of which a plurality of data units to be reproduced within a certain time range A plurality of data pack sequences in which the data unit has compressed and packetized the reproduction data including at least one of audio, video, and sub-picture, and navigation at which the first reproduction information relating to reproduction of the data unit is described at the head thereof. Means for generating a table in which data cells constituted of a pack and reproduction information relating to reproduction of each data cell are described; A communication system is provided which transmits this table and refers to this table and transmits reproduction data with navigation data consisting of means for transmitting a data unit headed by the navigation pack.

Hereinafter, an optical disc reproducing apparatus according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a block of an optical disc reproducing apparatus for reproducing data from an optical disc according to an embodiment of the present invention, FIG. 2 shows a block of a disc driver section for driving an optical disc shown in FIG. 1, and FIG. The structure of the optical disc shown in FIG. 1 and FIG. 2 is shown.

As shown in FIG. 1, the optical disc player has a key operation / display section 4, a monitor section 6, and a speaker section 8. As shown in FIG. Here, the recording data is reproduced from the optical disc 10 by the user operating the key operation / display section 4. Recorded data includes video data, sub-picture data and audio data, which are converted into video signals and audio signals. The monitor unit 6 displays an image by a video signal, and the speaker unit 8 generates audio by an audio signal.

As is already known, the optical disc 10 has various structures. As the optical disc 10, for example, as shown in FIG. 3, there is a read only disc in which data is recorded at a high density. As shown in FIG. 3, the optical disk 10 is composed of a pair of composite layers 18 and an adhesive layer 20 interposed between the composite disk layers 18. As shown in FIG. Each composite disk layer 18 is composed of a transparent substrate 14 and a recording layer, that is, a light reflection layer 16. The disk layer 18 is arranged such that the light reflection layer 16 is in contact with the surface of the adhesive layer 20. The optical disk 10 is provided with a center hole 22, and a clamping area 24 for pressing the optical disk 10 at the time of rotation is provided around the central hole 22 on both sides thereof. In the center hole 22, the spindle of the spindle motor 12 shown in FIG. 2 is inserted when the disk 10 is loaded in the optical disk device, and the optical disk 10 has its clamping area 24 while the disk is being rotated. Is clamped.

As shown in FIG. 3, the optical disc 10 has an information area 25 capable of recording information on the optical disc 10 around the clamping area 24 on both sides thereof. Each information area 25 has a lead-out area 26 in which its outer circumferential area is not normally recorded, and a lead-in area 27 in which its inner circumferential area which is in contact with the clamping area 24 is normally not recorded. And the data recording area 28 between the lead-out area 26 and the lead-in area 27.

In the recording layer 16 of the information area 25, tracks are normally formed in a spiral form as a region in which data is recorded, and the continuous tracks are divided into a plurality of physical sectors, and the sectors are given a continuous number. The data is recorded based on this sector. The data recording area 28 of the information recording area 25 is an actual data recording area in which reproduction information, video data, sub-picture data and audio data are equally fit (i.e., changes in physical state) as described later. It is recorded. In the read-only optical disc 10, pit rows are formed in the transparent engine 14 by stampers in advance, and a reflective layer is formed on the surface of the transparent substrate 14 on which the pit rows are formed by vapor deposition, and the reflective layer is a recording layer ( 16). In this read-only optical disc 10, a group as a track is not particularly provided, and a pit row formed on the surface of the transparent engine 14 is defined as a track.

The optical disk device 12 further includes a disk drive unit 30, a system CPU unit 50, a system ROM / RAM unit 52, a system processor unit 54, and a data RAM unit as shown in FIG. 56, a video decoder 58, an audio decoder 60, a sub-picture decoder 62, and a D / A and data reproducing unit 64. The video decoder unit 58 includes: a video decoder unit 58; The system processor 54 includes a system time clock 54A and a register 54B, and the video decoder 58, the audio decoder 60, and the sub-picture decoder 62 are similarly the system time. Clock (STC) 58A, 60A, and 62A are provided.

As shown in FIG. 2, the disc driver 30 includes a motor driver circuit 11, a spindle motor 12, an optical head 32 (i.e., an optical pickup), a feed motor 33, a focus circuit 36 ), A feed motor drive circuit 37, a tracking circuit 38, a head amplifier 40, and a servo processing circuit 44. The optical disc 10 is mounted on the spindle motor 12 driven by the motor drive circuit 11 and rotated by this spindle motor 12. An optical head 32 for irradiating a laser beam to the optical disc 10 is placed under the optical disc 10. In addition, this optical head 32 is mounted on the guide mechanism (not shown). The feed motor drive circuit 37 is provided for supplying a drive signal to the feed motor 33. The motor 33 is driven by the drive signal to move the optical head 32 in the radial direction of the optical disc 10. The optical head 32 has an objective lens 34 facing the optical disk 10. The objective lens 34 is moved along its optical axis in accordance with a drive signal supplied from the focus circuit 36.

In order to reproduce data from the optical disc 10 described above, the optical head 32 irradiates the optical disc 10 with a laser beam through the objective lens 34. The objective lens 34 gradually moves in the radial direction of the optical disc 10 in accordance with a drive signal supplied from the tracking circuit 38. The objective lens 34 is also finely moved along its optical axis direction in accordance with a drive signal supplied from the focusing circuit 35 so that its focus is located on the recording layer 16 of the optical disc 10. As a result, the laser beam forms a minimum beam spot on the spiral track (i.e. pit row), and the track is tracked to the light beam spot. The laser beam is reflected by the recording layer 16 and returned to the optical head 32. The optical head 32 converts the light beam reflected from the optical disc 10 into an electric signal, which is supplied from the optical head 32 to the servo processing circuit 44 by the head amplifier 40. The servo processing circuit 44 generates a focus signal, a tracking signal and a motor control signal from the electric signals, and supplies these signals to the focus circuit 36, the tracking circuit 38, and the motor driving circuit 11, respectively. .

Therefore, the objective lens 34 is moved along the optical axis and the radial direction of the optical disc 10, the focus thereof is located on the recording layer 16 of the optical disc 10, and the laser beam is spiraled to the minimum beam spot. Form on the track. In addition, the spindle motor 12 is rotated at a predetermined rotation speed by the motor drive circuit 11. As a result, the pit rows of the optical disc 10 are tracked constantly, for example, by the light beam.

The control signal as an access signal is supplied to the servo processing circuit 44 from the system CPU unit 50 shown in FIG. In response to this control signal, a head moving signal is supplied from the servo processing circuit 44 to the feed motor driving circuit 37 so that the circuit 37 supplies the driving signal to the feed motor 33. Thus, the feed motor 33 is driven and the optical head 32 is moved along the radial direction of the optical disc 10.

Then, a predetermined sector formed in the recording layer 16 of the optical disc 10 is accessed by the optical head 32. The reproduction data is reproduced from the predetermined sector and supplied from the optical head 32 to the head amplifier 40, amplified by the head amplifier 40, and output from the disk driver unit 30.

The output reproduction data is stored in the data RAM unit 56 by the system processor unit 54 under the control of the system CPU unit 50 controlled by the program recorded in the system ROM and RAM unit 52. The stored reproduction data is processed by the system processor 54 to be classified into video data, audio data and sub-picture data, and the video data, audio data and sub-picture data are respectively a video decoder 58 and an audio decoder. 60 is output to the sub-picture decoder 62 and decoded. Decoded video data, audio data, and sub-picture data are converted into video signals and audio signals as analog signals by the D / A and playback processing circuit 64, while the video signals are supplied to the monitor 6 and the audio signals are speaker. It is supplied to the part 8, respectively. As a result, an image is displayed on the monitor unit 6 by the video signal and the sub-picture signal, and audio is reproduced from the speaker unit 8 by the audio signal.

The detailed operation of the optical disk apparatus shown in FIG. 1 will be described later in detail with reference to the logical format of the optical disk 10 described later.

The data recording area 28 from the lead in area 27 to the lead out area 26 of the optical disc 10 shown in FIG. 1 has a volume and file structure as shown in FIG. Have This structure is determined in accordance with specific standards, for example, micro UDF and ISO9660, as logical formats. As described above, the data recording area 28 is physically divided into a plurality of sectors, and the physical sectors are assigned consecutive numbers. In the following description, the logical address means a logical sector number (LSN) as defined in micro UDF and ISO9660, and the logical sector is 2048 bytes like the size of the physical sector, and the logical sector number (LSN). The sequential numbers are added in ascending order of the physical sector numbers.

As shown in FIG. 4, this volume and file structure has a hierarchical structure and includes a volume and file structure area 70, a video manager 71, at least one video title set 72 and another recording area 73. Have These areas are divided on the boundaries of the logical sectors. Here, as in the conventional CD, one logical sector is defined as 2048 bytes. Similarly, one logical block is also defined by 2048 bytes, and thus, one logical sector is defined by one logical block.

The file structure area 70 corresponds to the management area defined in the micro UDF and ISO9660, and the video manager 71 is stored in the system ROM / RAM unit 52 through the description of this area. In the video manager 71, information for managing a set of video titles is described as described with reference to FIG. It consists of a plurality of files 74 starting from zero. In addition, each video title set 72 stores compressed video data, audio data and sub-picture data, and their reproduction information as described later, and is composed of a plurality of files 74 in the same manner. Here, the plurality of video title sets 72 is limited to a maximum of 99, and the files 74 constituting each video title set 72 (File) File from j The number of j + 9) is set to 10 at maximum. These files are similarly divided by logical sector boundaries.

In the other recording area 73, information available for the above-described video title set 72 is recorded. This other recording area 73 may not necessarily be provided.

As shown in FIG. 5, the video manager 71 includes three items each corresponding to each file 74. FIG. That is, the video manager 71 is composed of a volume manager information (VMGI) 75, a video object set (VMGM_VOBS) 76 in the video manager information menu, and a backup of the video manager information (VMGI_BUP) 77. . Here, the volume manager information (VMGI) 75 and the backup of the video manager information (VMGI_BUP) 77 are required items, and the video object set (VMGM_VOBS) 76 for the video manager information menu is an optional item. have. The VMGM video object set (VMGM_VOBS) 76 stores video data, audio data, and sub-picture data of a menu relating to the volume of the optical disc managed by the video manager 71.

This VMGM video object set (VMGM_VOBS) displays the volume name of the optical disc, the description of the audio and sub-picture accompanying the volume name display, and the selectable items as sub-videos, as shown in video playback described later. For example, the VMGM video object set (VMGM_VOBS) 76 includes video data containing a match until the world champion of the boxer with the optical disc is stored, that is, the volume name such as the history of glory of the boxer X. The fighting pose of the boxer X is reproduced as video data and his theme song is displayed by voice, and his timeline and the like are displayed as sub-pictures. In addition, it is possible to inquire which language, such as English or Japanese, for the narration of the game as the selection item, and to display subtitles of other languages as sub-pictures or to select which language subtitles are selected. . The VMGM video object set (VMGM_VOBS) 76 allows the user to prepare for viewing the video of the boxer X, for example, by adopting Japanese subtitles as audio as a sub-picture in English.

Now, the structure of the video object set (VOBS) 82 will be described with reference to FIG. 6 shows an example of a video object set (VOBS) 82. In this video object set (VOBS) 82, there are three types of video object sets (VOBS) 76, 95, and 96 for two menus and titles.

That is, the video object set (VOBS) 82 is composed of the video object set (VTSM_VOBS) 95 and the at least one video title set of the video title set (VTS) 72 as described later. There is a video object set (VTSTT_VOBS) 96 for a title, and either video object set 82 has the same structure except that its purpose is different.

As shown in FIG. 6, video object set (VOBS) 82 is defined as a collection of one or more video objects (VOB) 83, and video object 83 in video object set (VOBS) 82. Serves the same purpose. Normally, a menu video object set (VOBS) 82 is composed of one video object (VOBS) 83, and data for displaying a plurality of menu screens is stored. In contrast, the title set video object set (VTSTT_VOBS) 82 is usually composed of a plurality of video objects (VOB) 83.

Here, the video object (VOB) 83 corresponds to the video data of each game of the boxer X using the above-mentioned boxing video as an example, and the eleventh war which challenges the world champion, for example, by designating the video object (VOB). Can be reproduced as a video. In addition, the menu video object set (VTSM_VOBS) 95 of the video title set 72 stores menu data of a match of the boxer X, and according to the display of the menu, a game that challenges a specific match, for example, a world champion. 11 can be specified. Further, in a movie of a normal one story, one video object (VOB) 83 corresponds to one video object set (VOBS) 82, and one video stream is completed in one video object set (VOBS) 82. do. In the animation collection or the omnibus format movie, a plurality of video streams corresponding to each story are provided in one video object set (VOBS) 82, and each video stream is stored in a corresponding video object. Accordingly, the audio stream sub-picture stream associated with the video stream is also completed in each video object (VOB) 83.

The video object (VOB) 83 has an identification number (IDN). j) is attached, and the video object (VOB) 83 can be specified by this identification number. The video object (VOB) 83 is composed of one or a plurality of cells 84. A normal video stream is composed of a plurality of cells. However, the menu video stream, that is, the video object (VOB) 83, may be composed of one cell 84. Similarly, the cell has an identification number (CIDN) j) is attached, this cell identification number (CIDN) The cell 84 is specified by j). When the angle to be described later is changed, the angle is changed by specifying this cell number.

Here, the angle means changing the viewing angle in the field of video, and in the boxing example, various angles such as scenes seen from the champion side, scenes seen from the challenger side, and scenes from the referee side are seen from the same knockout scene. Means that you can see. The angle can be selected in accordance with the user's preference, or the same scene may be automatically changed and repeated in the flow of the story. In addition, when selecting an angle, when the angle is changed back to the beginning of the same scene, for example, the angle is changed in the scene at the moment when the boxer puts the counter, and when the counter enters again, the angle is changed in the scene following the scene. In the case of changing, for example, the angle may change at the moment when the boxer enters the punch after the counter is inserted. The navigation pack 86 described later in detail is provided in the video object unit (VOBU) 83 so that any angle change can be realized.

As shown in FIG. 6, each cell 84 is composed of one or a plurality of video object units (VOBUs) 85, typically a plurality of video object units (VOBUs) 85. FIG. Here, the video object unit (VOBU) 85 is defined as a pack sequence having one navigation pack (NV pack) 86 at the head. That is, the video object unit (VOBU) 85 is defined as a set of entire packs recorded from one navigation pack 86 to just before the next navigation pack. The playback time of the video object unit VOBU corresponds to the playback time of video data composed of one or more GOPs included in the video object unit VOBU, as shown in FIG. It is decided not to be larger than 1 second as more than a second. In MPEG, 1 GOP is usually 0.5 seconds, and about 15 pictures are compressed image data for reproduction.

As shown in FIG. 6, when the video object unit includes video data, the video pack (V pack) 88, the sub-picture pack (SP pack) 90, and the audio pack (A pack) specified in the MPEG standard. The video data stream is formed by arranging the GOPs composed of 91, but regardless of the number of GOPs, the video object (VOBU) 83 is determined based on the playback time of the GOP, and the navigation is always at the head. Packs (NV packs) are arranged. Also in the playback data of only the audio and / or sub-picture data, the playback data is configured using this video object unit as one unit. That is, even if the video object unit is composed of only the audio pack, the audio pack to be played back within the playback time of the video object unit to which the audio data belongs, like the video object of the video data, is stored in the video object unit. The playback order of these packs will be described later in detail at the same time as the navigation pack (NV pack) 86.

The video manager 71 will be described again with reference to FIG. The volume manager information 75 disposed at the head of the video manager 71 describes information for managing the video title set (VTS) 72 such as information for searching for titles and information for playing the video manager menu. At least three tables 78, 79 and 80 are recorded in the order shown in FIG. Each of these tables 78, 79, and 80 corresponds to the boundary of logical sectors. The volume management information management table (VMGI_MAT) 78, which is the first table, is an essential table. The size of the video manager 71, the start address of each information in the video manager 71, and a video object set (VMGM_VOBS) for the video manager menu. Attribute information and the like regarding (76) are described.

The title search pointer table (TT_SRPT) 79, which is the second table of the video manager 71, is included in the volume of the corresponding optical disc 10, which can be selected in accordance with the input of the key of the apparatus and the title number from the display unit 4. The entry program chain (EPGC) of the video title to be described is described.

Here, the program chain 87 is a set of programs 89 for reproducing the story of a certain title as shown in FIG. 7 so that the program chain is successively reproduced to complete the movie of any one title. Thus, the user can watch the movie from a particular scene of the movie by designating the program 89 in the program chain 87.

In the video title set attribute table (VTS_ATRT) 80, which is the third table of the video manager 71, attribute information specified in the video title set (VTS) 72 in the volume of the optical disc is described. That is, the number of the video title set (VTS) 72 as the attribute information, the number of the video title set (VTS) 72, the attribute of the video, for example, the compression method of the video data, etc. The attributes of the sub-picture, such as the encoding mode of the sub-picture, for example, the display type of the sub-picture are described in this table.

For details of the contents described in the volume management information management table (VMGI_MAT) 78 and the title search pointer table (TT_SRPT) 79, refer to FIG. 8, FIG. 9, FIG. 10 and FIG. To explain.

As shown in FIG. 8, the volume management information management table (VMGI_MAT) 78 includes a number of identifiers (VMG_ID) of the video manager 71 and a number of logical blocks (2048 bytes as one logical block as already set). The version number (VERN) and the category (VMG_CAT) of the video manager 71 are described, with respect to the size of the information (VMGI_SZ), the corresponding optical disc, the generic digital general purpose disc (hereinafter referred to simply as DVD). have.

In the category (VMG_CAT) of the video manager 71, a flag or the like indicating whether or not this DVD video directory is prohibited from copying is described. The table (VMGI_MAT) 78 also includes an identifier (VLMS_ID) of the volume set, the number of video title sets (VTS_Ns), an identifier (PVR_ID) of the provider of the data recorded on this disk, and a video object set in the Video Manager menu. The start address (VNGM_VOBS_SA) of the (VMGM_VOBS) 76, the end address (VMGI_MAT_EA) of the management table (VMGI_MAT) 78 of the volume manager information, and the start address (TT_SRPT_SA) of the title search pointer table (TT_SRPT) 79 are described. It is. The end address (VMGI_MAT_EA) of the VMGI_MAT 78 and the start address (TT_SRPT_SA) of the TT_SRPT 79 are described in the relative number of logical blocks from the leading logical block.

In this table 78, the start address (VTS_ATRT_SA) of the attribute table (VTS_ATRT) 80 of the video title set (VTS) 72 is relative from the first byte of the VMGI manager table (VMGI_MAT) 71. The video attribute (VMGM_V_ATR) of the video manager menu VMGM is described. This table 78 further includes the number of audio streams (VMGM_AST_Ns) of the video manager menu (VMGM), the attribute of the audio stream (VMGM_AST_ATR) of the video manager menu (VMGM), and the number of sub-picture streams of the video manager menu (VMGM). (VMGM_SPST_Ns) and the attribute (VMGM_SPST_ATR) of the sub picture stream of the video manager menu (VMGM) are described.

In the title search pointer table (TT_SPRT) 79, information TSPTI of the title search pointer table is first described, as shown in FIG. 9. Next, the title search for input number 1 to n (n≤99) is described. The number of pointers TT_SRP is continuously described. If only one title playback data, for example, video data of one title, is stored in the volume of the optical disc, only one title search pointer (TT_SRP) 93 is described in this table (TTSRPT) 79.

The title search pointer table information (TSPTI) 92 describes the number of entry program chains EN_PGC_Ns and the end address (TT_SRPT_EA) of the title search pointer (TT_SRP) 93 as shown in FIG. This address TTSRPTEA is described in the relative number of bytes from the first byte of this title search pointer table (TT_SRPT) 79. In addition, as shown in FIG. 11, each title search pointer TT_SRP describes a video title set number VTSN, a program chain number PGCN, and a start address VTS_SA of the video title set 72. As shown in FIG.

The video title set (VTS) 72 to be reproduced by the contents of the title search pointer (TTSRP) 93, the program chain PGC is specified, and the storage position of the video title set 72 is specified. . The start address VTS_SA of the video title set 72 describes the title set designated by the video title set number VTSN in logical block numbers.

Next, the structure of the logical format of the video title set (VTS) 72 shown in FIG. 4 will be described with reference to FIG. In each video title set (VTS) 72, four items 94, 95, 96, and 97 are described in the order of description, as shown in FIG. In addition, each video title set (VTS) 72 is composed of one or more video titles having a common attribute, and management information about the video title 72, for example, information for an entry search point, video Information for reproducing the object set 96, information for reproducing the title set menu VTSM, and attribute information of the video object set 72 are described in the video title set information VTSI.

A backup of this video title set information (VTSI) 94 is provided in the video title set (VTS) 72. Between the video title set information (VTSI) 94 and the backup of this information (VTSI_BUP) 97, the video object set (VTSM_VOBS) 95 for the video title set menu and the video object set (VTSTT_VOBS) for the video title set title. ) 96 is arranged. Either video object set (VTSM_VOBS and VTSTT_VOBS) 95, 96 also has the structure shown in FIG.

The video title set information (VTSI) 94, the backup of this information (VTSI_BUP) 97, and the video object set (VTSTT_VOBS) 96 for the video title set title take the video title set 72 and become an essential item. The video object set (VTSMVOBS) 95 for the video title set menu is a selection item to be installed as necessary.

The video title set information (VTSI) 94 is composed of four tables 98, 99, 100, and 101, as shown in FIG. 12, and the four tables 98, 99, 100, and 101 correspond to the boundaries between logical sectors. The video title set information management table (VTSI_MAT) 98, which is the first table, is an essential table, the size of the video title set (VTS) 72, the start address of each information in the video title set (VTS) 72, and the video. The attributes of the video object set (VOBS) 82 in the title set (VTS) 72 are described.

The video title set direct access pointer table (VTS_DAPT) 99, which is the second table, is a selection table provided as needed, and the corresponding video title set selectable in accordance with the input of the title number from the key operation / display section 4 of the apparatus. Program chain PGC and / or program PG included in 72 is described.

The video title set program chain information table (VTS_PGCIT) 100, which is the third table, describes the VTS program chain information VTS_PGCI as an essential table. The video title set time search map table (VTS_MAPT) 101, which is the fourth table, is a selection table that is installed as necessary, and each of the title sets 72 to which this map table (VTS_MAPT) 101 belongs for a certain time of display. Information on the recording position of video data in the program chain PGC is described.

Next, the video title information manager table (VTSI_MAT) 98 and the video title set program chain information table (VTS_PGCIT) 100 shown in FIG. 12 will be described with reference to FIGS. 13 to 20.

FIG. 13 shows the description of the video title information manager table (VTSI_MAT) 98. As shown in FIG. This table (VTIS_MAT) 98 includes the video title set identifier (VTS_ID), the size (VTS_SZ) of the video title set 72, the version number (VERN) of this DVD video standard, and the attributes of the title set 72 in the order described. (VTS_CAT) is described. In this table (VTSI_MAT) 98, the start address (VTSM_VOBS_SA) of the video object set (VTSM_VOBS) 95 of the VTS menu (VTSM) is relative to the head logical block of the video title set (VTS) 72. The start address (VTSTT_VOB_SA) of the video object for the title in the video title set (VTS) described in the logical block (RLBN) is the relative logical block (from the head logical block of the video title set (VTS) 72). RLBN).

In this table (VTSI_MAT) 98, the end address (VTI_MAT_EA) of the video title set information management table (VTI_MAT) 94 is described as the relative number of blocks from the first byte of the table (VTI_MAT). The start address (VTS_DAPT_SA) of the direct access pointer table (VTS_DAPT) 99 is described in the relative number of blocks from the first byte of the video title set information (VTSI) 94.

In this table (VTSI_MAT) 98, the start address (VTS_PGCIT_SA) of the video title set program chain information table (PGCIT) 100 is described as the relative number of blocks from the first byte of the video title set information (VTSI) 94. Then, the start address (VTS_MAPT_SA) of the time search map (VTS_MAPT) 101 of the video title set (VTS) is described as the relative logical sector from the head logical sector of this video title set (VTS) 72. This table (VTSI_MAT) 98 includes the video object set (VTSM_VOBS) 95 and the title VTSTT of the video title set (VTS) in the video title set menu (VTSM) of the video title set (VTS) 72. Audio stream of the video attribute (VTS_V_ATR) of the video object set (VTST_VOBS) 96 for the video object set (VTSTT_VOBS) 96 for the title (VTSTT) of the video title set of the video title set (VTS) 72. The number of (VTS_AST_Ns) is described.

Here, the video attribute VTS_V_ATR describes the compression mode of the video, the frame rate of the TV system, and the aspect ratio of the display when displaying on the display device.

The table (VTSI_MAT) 98 includes the audio stream attribute (VTS_AST_ATR) of the video object set (VTST_VOBS) 96 in the title (VTSTT) of the video title set (VTS) 72 in the video title set (VTS) 72. This is described. This attribute (VTS_AST_ATR) describes the matching mode of audio describing how audio is matched, the number of bits of quantization of audio, the number of channels of audio, and the like. In the table (VTSI_MAT) 98, the number of sub-picture streams (VTS_SPST_Ns) of the video object set (VTST_VOBS) 96 of this title (VTSTT) in the video title set (VTS) 72 and each sub-picture stream are also included. The attribute VTS_SPST_ATR is described. The attribute VTS_SPST_ATR of each sub-picture stream describes the matching mode of the sub-picture, the display type of the sub-picture, and the like.

This table (VTSI_MAT) 98 also includes the number of audio streams (VTSM_AST_Ns), audio stream attributes (VTSM_AST_ATR), number of sub-streams (VTSM_SPST_Ns), and sub-streams (VTSM_SPST_ATR) of the video title set menu (VTSM). This is described.

The VTS program chain information table (VTS_PGCIT) 100 has a structure as shown in FIG. Information VTS_PGCI relating to the VTS program chain VTSPGC is described in this information table VTS_PGCIT 100, and information VTS_PGCIT_I of the information table VTS_PGCIT 100 relating to the VTS program chain VTS_PGC as an entry of the start. 102 is installed. Following this information (VTS_PGCIT_I) 102, this information table (VTS_PGCIT) 100 includes the number of VTS program chains (VTS_PGC) in this information table (VTS_PGCIT) 100 ( From 1 The VTS_PGCI search pointer (VTS_PGCIT_SRP) 103 which searches the VTS program chain VTS_PGC by n) is provided, and each VTS program chain (# 1 to #n) corresponding to the VTS program chain VTS_PGC is finally provided. Information (VTS_PGCI) 104 relating to VTS_PGC) is provided.

In the information (VTS_PGCIT_I) 102 of the VTS program chain information table (VTS_PGCIT) 100, as shown in FIG. 15, the number (VTS_PGC_Ns) of the VTS program chain VTS_PGC is described as the content, and this table information ( The end address (VTS_PGCIT_EA) of the VTS_PGCIT_I) 102 is described by the relative number of bytes from the first byte of this information table (VTS_PGCIT) 100.

In addition, the VTS_PGCIT search pointer (VTS_PGCIT_SRP) 103 includes the attributes VTS_PGC_CAT of the program chain VTS_PGC of the video title set (VTS) 72 and the VTS_PGC information table (VTS_PGCIT) 100 as shown in FIG. The start address (VTS_PGCI_SA) of the VTS_PGC information (VTS_PGCI) is described in the relative number of bytes from the first byte of the " Here, the VTS_PGC attribute (VTS_PGC_CAT) describes as an attribute, for example, whether or not the entry program chain (entry PGC) to be reproduced first. Typically, the entry program chain PGC is described before the program chain PGC and not the entry program chain PGC.

PGC information (VTS_PGCI) 104 in the video title set describes four items as shown in FIG. This PGC information (VTS_PGCI) 104 initially describes the program chain general information (PGC_GI) 105 of the required items, and at least three items 106, 107, and 108 that are required only if there is a video object subsequently. ) Is described. That is, the program chain program map (PGC_PGMAP) 106, the cell reproduction information table (C_PBIT) 107, and the cell position information table (C_POSIT) 108 are described in the PGC information (VTS_PGCI) 104 as the three items. It is.

In the program chain general information (PGC_GI) 105, as shown in FIG. 18, the category (PGCI_CAT) of the program chain (PGC), the contents (PGC_CNT) of the program chain (PGC), and the playing time of the program chain (PGC) ( PGC_PB_TIME) is described. The category (PGCI_CAT) of the PGC describes whether the copy of the PGC is possible and whether the reproduction of the program in the PGC is continuous or random. The content (PGC_CNT) of the PGC describes the contents of the program chain, that is, the number of programs, the number of cells, and the number of angles in the program chain. The playback time (PGC_PB_TIME) of the PGC describes the total playback time of the program in the PGC and the like. This reproduction time describes the reproduction time of the program when the programs in the PGC are continuously reproduced regardless of the reproduction order. When there is an angle mode, the reproduction time of the angle cell number 1 indicates the reproduction time of the angle.

The program chain general information (PGC_GI) 105 also describes PGC subpicture stream control (PGC_SPST_CTL), PGC audio stream control (PGC_AST_CTL), and PGC subpicture pellet (PGC_SP_PLT). PGC sub-picture stream control (PGC_SPST_CTL) describes the number of sub-pictures that can be used in PGC, and PGC audio stream control (PGC_AST_CTL) describes the same number of audio streams that can be used in PGC. The PGC subpicture pallet (PGC_SP_PLT) describes a set of a predetermined number of color pallets used in all subpicture streams of this PGC.

In the PGC general information (PGC_GI) 105, the start address (C_PBIT_SA) of the cell reproduction information table (C_PBIT) 107 and the start address (C_POSIT_SA) of the cell position information table (C_POSIT) 108 are described. Both start addresses C_PBIT_SA and C_POSIT_SA are also described in the relative number of logical blocks from the first byte of the VTS_PGC information (VTS_PGCI).

The program chain program map (PGC_PGMAP) 106 is a map showing the configuration of a program in the PGC as shown in FIG. In this map (PGC_PGMAP) 106, as shown in Figs. 19 and 20, the entry cell number ECELLN, which is the start cell number of the program, is described in ascending order of the cell number. In addition, the program numbers are allocated from 1 in the order of description of the entry cell numbers. Therefore, the first entry cell number of this map (PGC_PGMAP) 106 is Must be 1

The cell reproduction information table (C_PBIT) 107 defines the reproduction order of the cells of the PGC. In this cell reproduction information table (C_PBIT) 107, cell reproduction information C_PBIT is continuously described as shown in FIG. Basically, reproduction of cells is reproduced in the order of the cell numbers. The cell category C_CAT is described in the cell reproduction information C_PBIT as shown in FIG. In this cell category (C_CAT), a cell block mode indicating whether a cell is a cell in a cell block or a cell in a cell block, and a cell block indicating that a cell is not part of the block, that is, an angle block. An STC discontinuous flag is described which indicates the type and necessity of resetting the system time clock STC. Here, the cell block is defined as a set of cells of a certain angle. The change of angle is realized by changing the cell block. That is, for example, in baseball, a change in the angle block that photographs a scene from the infield from an angle block that photographs the scene in the outfield corresponds to a change in the angle.

In addition, the cell category C_CAT includes a cell playback mode indicating whether the video is continuously played in the cell or stopped in units of each video object unit (VOBU) in the cell, or a cell navigation indicating whether or not the cell is stopped after playing the cell. Control is described.

In addition, as shown in FIG. 22, the cell reproduction information table (C_PBIT) 107 includes a cell reproduction time (C_PBTM) describing the total reproduction time of the PGC. When the angle cell block is in the PGC, the reproduction time of the angle cell number 1 indicates the reproduction time of the angle block. In the cell reproduction information table (C_PBIT) 107, the head video object unit (VOBU) 85 in the cell is represented by the relative number of logical sectors from the head logical sector of the video object unit (VOBU) 85 in which the cell is recorded. The start video address C_FVOBU_SA is described, and the final video object unit (VOBU) 85 in the cell is expressed by the relative number of logical sectors from the head logical sector of the video object unit (VOBU) 85 in which the cell is recorded. Is a start address (C_LVOBU_SA).

The cell position information table (C_POSI) 108 specifies the identification number (VOB_ID) and the cell identification number (C_ID) of the video object (VOB) of the cell used in the PGC. In the cell position information table C_POSI, as shown in FIG. 23, the cell position information C_POSI corresponding to the cell number described in the cell reproduction information table C_PBIT 107 is the same as the cell reproduction information table C_PBIT. It is described in order. In this cell position information C_POSI, an identification number C_VOB_IDN and a cell identification number C_IDN of the video object unit (VOBU) 85 of the cell are described as shown in FIG.

As described with reference to FIG. 6, the cell 84 is a collection of video object units (VOBUs) 85, and the video object units (VOBUs) 85 are packed sequences starting from the navigation (NV) pack 86. Is defined as Therefore, the start address C_FVOBU_SA of the first video object unit (VOBU) 85 in the cell 84 indicates the start address of the NV pack 86. This NVpack (86) has two packets as pack header (110), system header (111) and navigation data as shown in FIG. That is, it has a structure consisting of a reproduction control information (PCI) packet 116 and a data search information (DSI) packet 117, the number of bytes as shown in FIG. 25 is attached to each part, and one pack is one logical sector. It is set to 2048 bytes corresponding to. This NV pack is placed immediately before the video pack containing the first data in the Group of Pictures (GOP). Even if the object unit 85 does not include a video pack, the NV pack is placed at the head of the object unit including the audio pack and / or the sub-picture pack. As described above, even when the object unit does not include the video pack, the playback time of the object unit is determined based on the unit in which the video is played, as in the case where the object unit includes the video pack.

The GOP is defined by the MPEG standard and is defined as a data string constituting a plurality of screens as described above. In other words, a GOP corresponds to compressed data. When the compressed data is expanded, image data of a plurality of frames capable of reproducing a moving image is reproduced. The pack header 100 and the system header 111 are defined by a system layer of MPEG2. The pack header 110 stores information about a pack start code, a system clock reference (SCR), and a multiplexing rate. The system header 11 The bit rate and stream ID are described. In the packet headers 112 and 114 of the PCI packet 116 and the DSI packet 117, a packet start code, a packet length, and a stream ID are stored as defined in the system layer of MPEG2.

The other video, audio and sub-picture packs 88, 89, 90 and 91 are identically pack header 120 such that they are defined as the system layer of MPEG2 as shown in FIG. It consists of a packet header 121 and a packet 122 storing corresponding data, and its pack length is set to 2048 bytes. Each pack of these corresponds to the boundary of the logical block.

The PCI data (PCI) 113 of the PCI packet 116 is navigation data for changing the presentation, that is, the content of the display, in synchronization with the playback state of the video data in the VOB unit (VOBU) 85. That is, the PCI data (PCI) 113 describes PCI general information (PCI_GI) as information of the entire PCI and angle information (NSLS_ANGLI) as interlaced angle information when the angle is changed as shown in FIG. . In the PCI general information (PCI_GI), as shown in FIG. 28, the NV pack (NV_PCK) in which the PCI 113 is recorded as the relative number of logical blocks from the logical sector of the VOBU 85 in which the PCI 113 is recorded. The address (NV_PCK_LBN) of (86) is described. In addition, the PCI general information PCI_GI describes the category (VOBU_CAT) of the VOBU 85, the start PTS (VOBU_SPTS) and the end PTS (VOBU_EPTS) of the VOBU 85. Here, the start PTS (VOBU_SPTS) of the VOBU 85 indicates the playback start time (start presentation time stamp SPTS) of the video data in the VOBU 85 in which the PCI 113 is included. This playback start time is the first playback start time in the VOBU 85. Normally, the first picture corresponds to the playback start time of an I picture (Intra-Picture) in the MPEG standard. The end PTS (VOBU_EPTS) of the VOBU 85 indicates the playback end time (end presentation time stamp: EPTS) of the VOBU 85 in which the PCI 113 is included.

In the angle information NSLS_ANGLI, as shown in FIG. 29, the start address NSLS_ANGC_DSTA of the interlacing angle cell is described by the number of angles, and the start address is a logical sector of the NV pack 86 in which the PCI 113 is recorded. Relative logic sectors from. In the case of an angle change based on this angle information NSLS_ANGLI, as shown in FIG. 30, the start of the VOBU 85 in another angle block such as the playback time of the VOBU 85 in which the corresponding PCI 113 is recorded. The start address (NSLS_ANGC_DSTA) of the VOBU 85 in another angle block whose address or playback time has the closest playback time before is described in this angle information NSLS_ANGLI.

According to the description of the start address NSLS_ANGC_DSTA of the angle cell, the following angle change is specifically realized. Here, a change in angle is assumed assuming a scene in which a series of time runs from a pitcher to a batter after a pitcher hits and the batter hits a home run. Here, the angle cell (ANG_C) controlled by the PCI 113 j) may be changed in units of the video object unit (VOBU) 85 as shown in FIG. In Fig. 30, the video object unit (VOBU) 85 is assigned a number according to the playback order in accordance with the playback order. Video object unit (VOBU) corresponding to playback number n of j) n) (85) is another angle cell (ANG_C) 1) (84) or angle cell (ANG_C) 9) Video object unit (VOBU) with playback number n corresponding to 84 n) 85 stores video data relating to another closest scene at the same time or earlier. Any angle cell (ANG_C) j) 84 has a pitcher and a batter's foreground on the screen, the VOBU 85 is continuously arranged as video data in which a series of motions are illuminated, and the angle cell ANG_C j) 84, the VOBU 85 is continuously arranged as video data in which only the batter is projected on the screen for viewing the batting form of the batter, and the angle cell ANG_C. In 9), it is assumed that only the pitcher's expression is the video data projected on the screen, and the VOBU 85 is continuously arranged. The angle cell #j (AGL_C # j) is first viewed by the user, so the angle cell at the moment When it is changed to 1, that is, when the angle is changed to an angle where only the batter is lit, the screen is not changed to the screen of the batter after hitting, and the screen is changed to the screen from when the batter before batting swings the bat. do. Also, angle cell at first j (AGL_C j) the angle cell at the moment If it is changed to 9, that is, when the angle is changed to the angle at which the pitcher only shines, the expression of the pitcher at the moment of hitting is displayed on the screen and the psychological change of the pitcher can be observed.

The DSI data (DSI) 115 of the DSI packet 117 shown in FIG. 25 is navigation data for executing the search of the VOB unit (VOBU) 85. DSI data (DSI) 115 describes DSI general information (DSI_GI), angle information (SML_AGLI), search information (VOBU_SI) of VOBU, and synchronous reproduction information (SYNCI) as shown in FIG.

The DSI general information (DSI_GI) describes the information of the entire DSI 115. That is, as shown in FIG. 32, the system time reference value NV_PCK_SCR of the NV pack 86 is described in the DSI general information DSI_GI. This system time reference reference value (NV_PCK_SCR) is stored in a system time clock (STC) embedded in each part shown in FIG. 1, and video, audio, and sub-picture packs are stored based on this STC. The video decoder unit 58, 60, 62 is decoded, and the video and audio are reproduced by the monitor unit 6 and the speaker unit 8. FIG. In the DSI general information (DSI_GI), the NV pack (NVPCK) in which the DSI 115 is recorded as the relative number of logical sectors (RLSN) from the head logical sector of the VOB set (VOBS) 82 in which the DSI 115 is recorded. The start address (NV_PCK_LBN) of 86 is described and the last in the VOB unit (VOBU) 85 in which the DSI 115 is recorded in the relative number of logical sectors RLSN from the head logical sector of the VOB unit VOBU. The pack address (VOBU_EA) is described.

In the DSI general information DSI_GI, the relative logical sector number R LSN from the head logical sector of the VOB unit VOBU in which the DSI 115 is recorded is recorded the last address of the first I picture in this VOBU. A cell in which the end address (VOBU_IP_EA) of the V pack (V_PCK) 88 is written and the identification number (VOBU_IP_IDN) of the VOBU 83 in which the DSI 115 is recorded and the DSI 115 are recorded. The identification number (VOBU_C_IDN) is described.

In the angle information SML_AGLI, as shown in FIG. 33, the start address (SML_ANGLI_DSTA) of the interlaced angle cells is described in the same manner as the angle information NSLS_ANGLI of the PCI 113, and the start address is the corresponding DSI. 115 is described as the relative logical sector from the logical sector of the recorded NV pack 86. In the case of changing the angle based on the angle information SML_AGLI, as shown in FIG. 34, the start of the cell 84 in another angle block after the reproduction time of the VOBU 85 in which the corresponding DSI 115 is recorded. The address is described in this angle information (SML_ANGLI).

When the angle information SML_ANGLI of the DSI is used, the angle is changed in units of cells while the PCI can be changed to the video object unit VOBU, and the scene is continuously changed in time. That is, the change in the angle in which the angle information SML_ANGLI of the PSI is discontinuous in time is described, and the change in the angle successively in the angle information SML_ANGLI of the DSI is described. When the specific example of the angle is demonstrated using the example of baseball mentioned above, the following angle change is implement | achieved. Angle cell j (AGL_C j) 84 is a stream of image data in which the batter hits the ball thrown by the pitcher, and the batting hits the home run, and the stream of image data photographed from the infield side. Set to a data stream. Angle cell # 9 is an image data stream obtained by photographing a team belonging to a hitter in the same scene. Angle cell j (AGL_C j) angle cell at the moment of hitting If it is changed to 1, that is, if the field is changed from the outfield side in an instant, the screen can be changed to the screen in which the batter flies to the outfield in time after the batter hits. Also, angle cell at first j (AGL_C i) watching the angle cell If you change it to 9, that is, the angle of the team that the batter belongs to, you can see the appearance of the team and the director's expression that are disturbed by the home run. In this case, when the PCI angle information (NSLS_ANGLI) and the DSI angle information (SML_ANGLI) are used, different scenes are clearly reproduced.

In the search information VOBU_SI of the VOBU 85, information for specifying the head address in the cell is described as shown in FIG. 35A. That is, in the search information (VOBU_SI) of the VOBU 85, as shown in FIG. 35A, the forward address [data] is based on the reproduction order of the VOB unit (VOBU) 85 including the corresponding DSI 115. The starting address (A_FWDn) of the VOB unit (VOBU) 85 from +1 to +20, +60, +120 and +240 as (FWDANn) is the leading logical sector of the VOB unit. The relative number of logical sectors from.

This forward address FWDANn is represented by 32 bits as shown in FIG. 35B, and from bit number 29 (b29) to bit number 0 (b0), the address, for example, the address of forward address 10 (FWDA10) is described. At the head of the forward address FWDANn, a flag V_FWD_Existl indicating whether video data exists in the video object unit VOBU corresponding to the forward address FWDANn, and the video object unit preceding the video object and the forward; A flag V_FWD_Exist2 indicating whether video data exists between is described. That is, V_FWD_Exist1 corresponds to bit number b31, and if this flag is 0, video data is sent to video object unit (VOBU) 85, which is designated from bit number 29 to forward address FWDANn described in bit number 0. If this flag is 1, it means that there is video data in the video object unit (VOBU) 85 specified by the forward address (FWDANn) described in bit number 29 to bit number 0. have. For example, when there is video data at forward address 10 (FWDA10), a flag of 1 is written in V_FWD_Exist1 at bit 31, and 0 is written in V_FWD_Exist1 at bit 31 when there is no video data at the address. In addition, V_FWD_Exist2 corresponds to bit number b30, and if this flag is 0, the video object unit VOBU designated from bit number 29 to forward address FWDANn described in bit number 0 and this forward address are described. It means that there is no video data in any of the video object units with the video object unit in which the DSI 115 is included. If this flag is 1, the video object unit (VOBU) 85 It means that the video data is any one video object unit in between. For example, forward 1 to forward 9 correspond to a video object unit of forward address 10 (FWDA10) and a video object unit 85 including a DSI 115 describing forward address 10 corresponding to forward address 0. If there is video data in a plurality of video object units, 1 flag is written in V_FWD_Exist2 at bit 30, and 0 is written in V_FWD_Exist2 at bit 30 when there is no video data at the address.

Similarly, the search information VOBU_SI of the VOBU is based on the VOB unit VOBU including the corresponding DSI, as shown in FIG. 35A, from -1 as the backward data BWDA in the reverse order of the reproduction order. The start addresses ABWDn of the VOB units VOBU up to -20, -60, -120 and -240 are described as the relative number of logical sectors from the head logical sector of the corresponding VOB unit.

This backward address BWDANn is represented by 32 bits as shown in FIG. 35C. From bit number 29 (b29) to bit number 0 (b0), the address, for example, the address of the backward address 10 (BWDA10), is represented. A flag (V_BWD_Exist1) indicating whether video data exists in the video object unit VOBU corresponding to the backward address BWDANn at the head of the backward address BWDANn, and the front of the video object and the backward word. A flag V_BWD_Exist2 indicating whether video data exists between the video object unit and the video object unit is described. That is, V_BWD_Exist1 corresponds to bit number b31, and if this flag is 0, video is sent to the video object unit (VOBU) 85 designated from the bit number 29 to the backward address (BWDANn) described in bit number 0. It means that there is no data, and if this flag is 1, it means that there is video data in the video object unit (VOBU) 85 designated from the bit number 29 to the backward address (BWDANn) described in the bit number 0. It means. For example, when there is video data in the backward address 10 (BWDA10), a flag of 1 is written in V_BWD_Exist1 of bit 31, and 0 is written in V_BWD_Exist1 of bit 31 when there is video data in the address. In addition, V_BWD_Exist2 corresponds to the bit number b30, and when this flag is 0, the video object unit VOBU specified by the bit address 29 to the bit address 0 described by the bit number 0 and this backward address are specified. Means that there is no video data in any of the video object units with the video object unit in which the DSI 115 is described. If this flag is 1, the video object unit (VOBU) 85 is used. Indicates that there is video data. For example, when there is video data in any one of the video object unit between the video object unit of the backward address 10 (BWDA10) and the backward address 10 corresponding to the backward address 0, a flag of 1 is assigned to V_BWD_Exist2 of bit 30. If there is no video data at the address, 0 is written in V_BWD_Exist2 of bit 30.

In the synchronization information SYNCI, address information of sub-picture and audio data to be reproduced in synchronization with the reproduction start time of the video data of the VOB unit VOBU including the DSI 115 is described. That is, as shown in FIG. 36, the start address of the target audio pack (APCK) 91 as the relative number of logical sectors (RLSN) from the NV pack (NV_PCK) 86 in which the DSI 115 is recorded. (ASYNCA) is described. When there are a plurality of audio streams (maximum 8), the synchronization information (SYNCI) is written for that number. In addition, the synchronization information (SYNCI) includes the address (SPSYNCA) of the NV pack (NV_PCK) 86 of the VOB unit (VOBU) 85 including the target audio pack (SP_PCK) 91. The relative logical sector number RLSN from the recorded NV pack (NV_PCK) 86 is described. If there are a plurality of sub-picture streams (maximum 32), synchronization information (SYNCI) is written for that number.

Next, with reference to FIG. 1 again, the operation of reproducing movie data from the optical disc 10 having the logical format shown in FIGS. 4 to 36 will be described. In Fig. 1, the solid arrows between blocks indicate data buses, and the broken arrows indicate control buses.

In the optical disk apparatus shown in FIG. 1, when the power is turned on and the optical disk 10 is loaded, the system CPU unit 50 reads out an initial operation program from the system ROM and RAM unit 52, and the disk driver unit. Activate (30). Therefore, the disk driver unit 30 starts a read operation from the lead-in area 27, and continues to the lead-in area 27 and defines a volume and file structure area that defines the volume and file structure in accordance with ISO-9660 or the like. 70) is read out. That is, the system CPU unit 50 issues a read command to the disk driver unit 30 to read the volume and file structure area 70 recorded at a predetermined position of the disk 10 set in the disk driver unit 30. And the contents of the volume and file structure area 70 are read out and stored in the data RAM unit 56 via the system processor unit 54 once. The system CPU unit 50 extracts management information as information necessary for management or other information such as a recording position or a recording size of each file through the path table and directory records stored in the data RAM unit 56, and for system use. It is transferred to and stored in a predetermined place of the ROM RAM unit 52.

Next, the system CPU unit 50 obtains a video manager 71 composed of a plurality of files starting from file number 0 with reference to the information on the recording position and recording capacity of each file from the system ROM RAM unit 52. do. That is, the system CPU unit 50 gives a read command to the disk driver unit 30 by referring to the information on the recording position and the recording capacity of each file obtained from the system ROM and RAM unit 52, and on the root directory. The position and size of a plurality of files constituting the video manager 71 present in the system are obtained, the video manager 71 is read out, and stored in the data RAM unit 56 via the system processor unit 54. The volume manager information management table (VMGI_MAT) 78 which is the first table of the video manager 71 is searched. This search obtains the start address (VMGM_VOBS_SA) of the video object set (VMGM_VOBS) 76 for the video manager menu VMGM, and the video object set (VMGM_VOBS) 76 is reproduced. Reproduction of this menu video object set (VMGM_VOBS) 76 is the same as the video object set (VTSM_VOBS) in the title in the video title set VTS. If the language is set using this video object set (VMGM_VOBS) 76 or if there is no video manager menu (VMGM), the volume manager information management table (VMGI_MAT) is searched and the title set search pointer table (TT_SRPT) 79 is set. Start address TT_SRPT_SA is searched for.

By this search, the title set search pointer table (TT_SRPT) 79 is transferred to a predetermined place in the system ROM RAM unit 52 and stored. Next, the system CPU unit 50 obtains the final address of the title search pointer table (TT_SRPT) 79 from the title search pointer table information (TSPTI) 92, and simultaneously inputs the number from the key operation / display unit 4; The video title set number VTSN, the program chain number PGCN and the start address VTS_SA of the video title set corresponding to the input number are obtained from the title search pointer (TT_SRP) 93 according to the above. If there is only one title set, one title search pointer (TT_SRP) 93 is searched to obtain the start address (VTS_SA) of the title set despite the presence or absence of an input number from the key operation / display section 4. do. From the start address VTSSA of this title set, the system CPU unit 50 obtains the target title set.

In addition, the system CPU unit 50 acquires the number of streams of the video, audio, and sub-video for the volume menu and the respective attribute information described in the information management table (VMGI_MAT) 78 of the volume manager (VMGI) 75. On the basis of the information, parameters for reproducing the video manager menu are set in each of the video decoder 58, the audio decoder 60, and the sub-picture decoder 62.

Next, from the start address VTS_SA of the video title set 72 shown in FIG. 11, video title set information (VTSI) 94 of the title set is obtained as shown in FIG. End address (VTI_MAT_EA) of the video title set information management table (VTSI_MAT) 98 shown in FIG. 13 from the video table set information management table (VTSI_MAT) 98 of this video title set information (VTSI) 94. Is obtained, and each part of the playback apparatus shown in FIG. Set according to the property.

If the menu VTSM for the video title set VTS has a simple configuration, the video object set VTSM_VOB for the menu of the video title set from the video title set information management table VTSI_MAT 98 shown in FIG. The start address (VTSM_VOB_SA) of the " 95 " is obtained and the menu of the video title set is displayed by the video object set (VTSM_VOB) 95. Referring to this menu, when playing the video object set (VTT_VOBS) 96 for the title VTST in the title set VTS without specifically selecting the program chain PGC, it is shown in FIG. The video object set 96 is reproduced from the start address VTSTT_VOB_SA.

When the program chain PGC is designated by the key operation / display section 4, the target program chain is searched in the following order. The search of the program chain is not limited to the program chain for the title in the video title set, and the same procedure is adopted for the search of the program chain for the menu even in a relatively complicated menu whose menu is composed of the program chain. The start address of the program chain information table (VTS_PGCIT) 100 in the video title set VTS shown in FIG. 13 described in the management table (VTSI_MAT) 98 of the video title set information (VTSI) 94 is obtained. The information VTS_PGCIT_I 102 of the VTS program chain information table shown in FIG. 14 is read. From this information (VTS_PGCIT_I) 102, the number of program chains VTS_PGC_Ns shown in FIG. 15 and the end address VTS_PGCIT_EA of the table 100 are obtained.

If the number of the program chain is designated in the key operation / display section 4, the category of the program chain shown in FIG. 16 from the VTS_PGCIT search pointer (VTS_PGCIT_SRP) 103 shown in FIG. 14 corresponding to the number, and its The start address of the VTS_PGC information 104 corresponding to the search pointer (VTS_PGCIT_SRP) 103 is obtained. The program chain general information PGC_GI shown in FIG. 17 is read out by this start address VTS_PGCI_SA. By this general information (PGC_GI), the category of the program chain (PGC) and the reproduction time (PGC_CAT, PGC_PB_TIME) are obtained, and the cell reproduction information table (C_PBIT) and the cell position information table (described in the general information (PGC_GI)) are obtained. The start addresses C_PBIT_SA and C_POSIT_SA of C_POSIT 108 are obtained. From the starting address C_PBIT_SA, as the cell position information C_POSI shown in FIG. 23, the identifier C_VOB_IDN of the video object and the cell identification number C_IDN as shown in FIG. 24 are obtained.

Further, the cell reproduction information C_PBI shown in FIG. 21 is obtained from the start address C_POSIT_SA, and the start address of the first VOBU 85 in the cell shown in FIG. 22 described in the reproduction information C_PBI. (C_LVOBU_SA) and the start address (C_LVOBU_SA) of the last VOBU are obtained and the target cell is searched for. The reproduction order of the cells is determined in turn with reference to the map of the program shown in FIG. 19 of the PGC program map (PGC_PGMAP) 106 shown in FIG. The data cells 84 of the program chain thus determined are sequentially read from the video object 144 and input to the data RAM unit 56 through the system processor unit 54. The data cell 84 is provided to the video decoder unit 58, the audio decoder unit 60 and the sub-picture decoder unit 62 based on the reproduction time information, and decoded to the D / A and reproduction processing unit 64. The signal is converted and the image is reproduced on the monitor unit 6, and audio is reproduced from the speaker units 8 and 9 at the same time.

The normal reproduction and fast search of video data using the navigation pack 86 will be described in more detail with reference to a flowchart.

In normal reproduction of video data, when normal reproduction is started as shown in FIGS. 37A and 37B, as described above after the start shown in step S11, the video manager information (VMGI) 75 is stored in the system CPU unit 50. As shown in FIG. ) Is stored in the system ROM / RAM unit 52. Similarly, based on this video manager information (VMGI) 75, the video title set information (VTSI) 94 of the video title set (VTS) 72 is read out and the video title set menu is displayed in the video object set (VTSM_VOBS). (95) is displayed on the monitor unit (6). Based on this display, as shown in step S13, the user determines the title set 72 to be reproduced, the reproduction conditions, and the like. If the determined title set 72 is selected using the key operation / display section 4, as shown in step S14, the program chain information table (VTS_PGCIT) 100 shown in FIG. 12 in the selected title set 72 is displayed. Data of the cell reproduction information table (C_PBIT) 107 shown in Figs. 17, 21 and 22 are read by the system CPU unit 50, which is stored in the system ROM / RAM unit 52. do.

The system CPU unit 50 determines the program chain number (VTS_PGC_Ns), the angle number (ANGNs), the audio stream number, and the sub-picture stream number to start playback in accordance with the playback conditions input from the key operation / display section 4. For example, the World Champion 11th Game of Boxing is selected as a title as a program chain, and it is decided to illuminate Japanese subtitles as sub-pictures based on English narration. In addition, the user selects, as an angle, a decision to always be able to enjoy the game on both sides, and the like. This determined sub-picture number and audio stream number are set in the register 54B of the system processor unit 54 as shown in step S16. Similarly, the playback start times are the system time clocks (STC) 54A, 58A, 60A, 62A of the system processor 54, the video decoder 58, the audio decoder 60 and the sub-picture decoder 62. Is set to). In addition, the start address and PGC number of the first VOBU in the cell as the start address, that is, the cell number, are stored in the system ROM / RAM unit 52.

As shown in step S17, when the video title set is ready to be read, a read command is given from the system CPU unit 50 to the disc driver unit 30, and the optical disc 10 is based on the above-described start address. It seeks by the disk driver part 30. FIG. This read command sequentially reads the cells related to the designated program chain PGC from the optical disc 10 and transfers them to the data RAM unit 56 through the system CPU unit 50 and the system processing unit 54. The transferred cell data is stored in the data RAM unit 56 from the navigation pack 86, which is the head pack of the video object unit (VOBU) 85, as shown in FIG. Thereafter, the video pack 88, the audio pack 91, and the sub-picture pack 90 of the video object unit VOBU are composed of the video decoder 58, the audio decoder 60, and the sub-picture decoder 62, respectively. ) Is decoded by each decoder and sent to the D / A and data reproducing unit 64. As a result, the video signal is sent to the monitor unit 6, the audio signal is sent to the speaker unit 8, and the display of the video with the sub-picture is started and the reproduction of the audio is started.

During the reproduction of such video and audio, if there is an interrupt processing from the key operation / display section 4, the obtained key data is stored in the system RAM / ROM section 52. If there is no key data, as shown in step S19, it is checked whether or not there is an interruption of the end of reproduction in the driver unit. If there is no interruption of the end of playback, the transmission of the navigation pack is awaited. When the transfer of the navigation pack 86 is completed, the system RAM / ROM unit 52 uses the logical sector number NV_PCK_LSN in the navigation pack 86 as the current logical block number NOWLBN as shown in step S20. To be stored in.

When the transfer of the NV pack 86 ends, it is checked whether or not it is the last NV pack in the cell. That is, it is checked whether or not it is the final navigation pack 86 in the cell 84 as shown in step S22. This check is checked by comparing the start address C_LVOBU_SA of C_LVOBU in the cell reproduction information table (C_PBI) 107 shown in FIG. 22 with the address V_PCK_LBN of the navigation pack 86. If the NV pack is not final in the cell, the process returns to step S18 again. If the NV pack is final in the cell 84, it is checked whether or not there is an angle change as shown in step S23. The change of the angle is determined based on whether there is an angle change input from the key operation / display section 4 to the system CPU section 50. FIG. If there is no change in angle, as shown in step S24, it is checked whether the cell 84 is the last cell of the program chain PGC to which it belongs. This check is determined by whether the cell 84 shown in Figs. 17 and 21 is the last cell of the cell reproduction information table (C_PBIT) 107. In other words, the number of cells constituting the program chain and the identification number of the reproduced cell are checked. If the cell does not correspond to the last cell of the program chain PGC, the process returns to step S18 again.

When the cell 84 is the last cell of the program chain PGC, it is assumed that the program chain is terminated, and the next program chain PGC is designated. Except in special cases, the program chains are reproduced in the order of their numbers, so that by adding 1 to the number of program chains for which playback has finished, the program chain number to be played next is set. It is checked in step S26 whether there is a program chain of this set program chain number. If there is no program chain to be reproduced next, the flow proceeds to the flow of the reproduction end procedure shown in FIG. 38 described later. If there is a set program chain, as shown in step S27, the address of the cell of the reset program chain, that is, the start address of the C_FVOBU 85 in the cell reproduction information (C_PBI) 107 shown in FIG. C_FVOBU_SA) is obtained as the current logical block number. As shown in step S28, it is checked whether or not this start address C_FVOBU_SA is equal to an address obtained by adding 1 to the last address ENDLBN of the cell 84 of the previous program chain that has already been reproduced. If it is the same, since the reproduction of the cells in successive addresses, the process returns to step S18 again. If the addresses are not the same, the cell addresses are not contiguous as shown in step S29. Thus, the system CPU unit 50 issues a read end address command indicating the end address of the current video object unit, and then to the designated address. The disk driver unit 30 temporarily stops the read operation. Thereafter, as shown in step S30, a read command is again given to the disk driver section 30 from the system CPU section 50, and a start address is given to the disk driver section 30, and returns to step S18 again. Seeking of the navigation pack 86 is started.

When there is a key input from the key operation / display section 4 in step 18, it is checked in step S31 shown in FIG. 39, for example, whether or not the key input is fast forward (FF), for example. In the case of the fast forward (FF) process, the fast search process described later is executed as shown in step S32. If it is not the fast forwarding process, as shown in step S9, other processing, for example, a process relating to a series of video reproduction such as playback pause, switching of the audio stream, and the like is executed, and the process proceeds to step S19.

In the case where playback is terminated in step S19 or there is no program chain to be reproduced next in step S26, as shown in step S51 in FIG. 38, the end PTS (described in the general information (PCI_GI) of the PCI 113) ( If VOBU_EPTS is referenced and this end PTS (VOBU_EPTS) matches the system time clock (STC), the display of the screen of the monitor 6 is stopped as shown in step S52, and the system CPU as shown in step S53. From the disk driver unit 30, a data transfer stop command is given, the data transfer is stopped, and the playback operation ends.

If there is an angle change input from the key operation / display section 4 in step S23, it is checked whether there is angle data as shown in step S40 of FIG.

The presence or absence of this angle is described as angle information (NSULS_ANGLI, SML_AGLI) in both the PCI data 113 and the DSI data 115 of the navigation pack 86. Here, any information is irradiated by the system CPU unit in accordance with the input from the key operation / display unit 4. In the case where there is no angle to be changed in this step S40, as shown in step S41, the fact that there is no angle data is displayed on the key operation / display section 4 or the monitor section 6. After the indication that there is no angle data, the process proceeds to step S24. If there is angle data, the angle number to be changed from the key operation / display section 4 is designated as shown in step S42. Here, as already described, it is specified whether the angle of the angle information (NSULS-ANGLI, SML_AGLI) of the PCI data and the DSI data is changed. However, when there is only one angle information, the selection is limited to one side. If the angle number is specified, the target addresses NSLS_ANGC_DSTA, SML_ANG_DSTA of the angle cell corresponding to the designated angle number as shown in Figs. 29 and 30 are obtained in step S43. The cell is searched for this address, and the address is set as the logical block number NOWLBN to seek. Here, in particular, when the angle is changed using PCI, the system CPU unit 50 mutes the reproduction of the video and audio data and pauses the reproduction of the sub-images according to the angle changing operation. With this processing, the system time clock (STC) of each part of the playback apparatus is stopped, and the buffer in the video, audio, and sub-picture decoder sections 58, 60, 62 has already been cleared to accommodate the changed angle data. It becomes At the same time, as shown in step S45, the system CPU unit 50 issues a read end address command and temporarily stops the read operation to the disk driver unit 30. As shown in FIG. Thereafter, as shown in step S46, a read command is given from the CPU unit 50 to the disk driver unit 30, and the cell is searched with the set logical block number to be sought, that is, the start address of the selected angle cell. Transmission of the selected angle cell data is started.

With the start of the transmission, it waits for transmission of the navigation pack of the first cell before the change angle again. As shown in step S48, it is checked whether or not the transmission of the navigation pack in accordance with the data transmission is completed, and when there is no transmission of the navigation pack, the flow returns to step S47 again. If there is a transmission of the navigation pack 86, each system time clock STC is set by referring to the SCR (NV_PCK_SCR) of the NV pack 86 described in the DSI general information DSIG of the navigation pack 86. Thereafter, the mute state of the video and audio and the pause state of the sub-image set in step S44 are released, and the operation of the system time clock STC is started. Thereafter, step S21 shown in FIG. 37A is performed as in normal playback.

When the interrupt processing is started as shown in step S33, the interrupt factor is stored in the system ROM / RAM unit 52 as shown in step S34. Next, as shown in step S35, it is checked whether or not this interrupt status is a timer interrupt. If it is not a timer interrupt, the process proceeds to step S37. In the case of a timer interrupt, the contents of the current system clock STC are read from one of the MPEG decoder units, i.e., the video, audio and sub-picture decoder units 58, 60 and 62, and the value is displayed in the display unit, for example, It is displayed on the monitor part 6 or the key operation / display part 4. Then, it is checked whether or not it is a key interrupt in step S37. In the case of a key interrupt, the data of the key input is stored in the system RAM / ROM. If the key is not interrupted and if the storing of the key input data ends, the interrupt processing ends as shown in step S39.

Next, with reference to FIGS. 42A, 42B, 42C, and 42D, the operation of the fast search of the image to be reproduced will be described. In the high-speed search of the reproduced image, it is assumed that image data is skipped every 10 video object units (VOBUs) 85. When the operation flow of the high-speed search is started in step S55, in step S56, the system CPU unit 50 instructs each decoder unit 58, 60, 62 of the playback apparatus for high-speed search. By this instruction, only I pictures in the video pack are reproduced from the video data, and audio and sub-picture data are forcibly muted and not reproduced. In addition, the display processing of the counter to the monitor unit 6 or the key operation / display unit 4 is prohibited, and the operation of the system time clock is stopped.

When the search is started, it is checked whether or not the navigation pack 86 of the video object unit (VOBU) 85 has been transmitted as shown in step S59. If there is no transmission of the navigation pack, the process returns to step S57 again and waits for the transmission of the navigation pack 86 to return to step S58. When the transfer of the navigation pack is completed in step S59, as shown in step S60, the logical block number NV_PCK_LBN of the navigation pack 86 shown in FIG. 32 and the forward address FWDA1 to FIG. 35 shown in FIG. FWDAn) is obtained and stored in the system ROM / RAM unit 52.

Next, as shown in step S62, the value of the SCR (NV_PCK_SCR) of the NV pack 86 is displayed on the monitor unit 6 or the key operation / display unit 4. By this display, the user can know the playback time of the currently searched video. After this display, it is checked in step S63 whether the I picture of the video data of the video object unit (VOBU) 85 to which the NV pack belongs is reproduced. In other words, the system CPU unit 50 waits for information indicating that the I picture is reproduced as the space information from the video decoder unit 58. When reproduction of the picture ends, as shown in step S64, it is checked whether or not the forward address FWDA10 [b29: b0] is described in bit 0 from bit 29 shown in FIG. 35B. If there is no description of the forward address (FW0A10 [b29: b0] = 0), the process proceeds to step S80 described later with reference to FIG. 42C. If there is a description of the forward address (FWDA10 [b29: b0] ≠ 0), then in step S65, the video object unit (VOBU) 85 of this forward 10 is checked whether there is video data. If there is no video data ((FWDA10 [b31] = 0), the flow proceeds to step S90 described later with reference to FIG. 42d. If there is video data ((FWDA10 [b31] ≠ 0), the forward address FWDA10 [b29: b0]) as the current relative logical block number, the video object unit 85 at the start address is searched.

Next, in step S67, it is checked whether the high-speed search is finished. If the high-speed search has not been completed, the data transfer stop command is given to the driver unit 30 in step S68, and the flow returns to step S57 again. When the high-speed search is completed in step S67, as shown in step S69 in FIG. 42B, a read command is given to the driver unit 30. In step S71, it is checked whether or not the NV pack 86 has been transmitted. Waits for the transfer of the NV pack 86. When the transfer of the NV pack 86 is completed, the address of the NV pack 86 is stored in the system ROM / RAM unit 52 as shown in step S72. If this address coincides with the relative logical block NOWLBN under search, an instruction of normal reproduction processing is given to the decoder units 58, 60, 62 in step S74, and each decoder unit 58, 60, 62 is normally provided. The playback mode is set, and the process proceeds to step S21 shown in FIG. 37A.

In step S64, if there is no description of the forward address in forward address 10 (FWDA10 [b29: b0] = 0), as shown in step S80 of FIG. 42C, there is no description of the forward address in forward address 9 (FWDA10 [b29]. : b0] = 0) is checked. If there is no description of the address, then in step S81 it is checked whether there is a description in forward address 8. As to the description of the forward address, as shown in steps S82 to S88, if there is no description, the number of the forward address is sequentially subtracted and checked to forward address 1. If the forward address S88 does not have a description as shown in step S88, the process proceeds to step S121 shown in FIG. 42E described later. In the case where the forward address 9 has a forward address description (FWDA10 [b29: b0] = 1) in step S80, the process proceeds to step S91 shown in FIG. 42D. In steps S82 to 88, when the forward address 8 to 1 has a description of the forward address (FWDA8 to 1 [b29: b0] = 1), the corresponding steps S93, S95, S97, and S99 shown in FIG. 42D are shown. The process proceeds to S103.

In step S65 shown in FIG. 42A, if there is no video data in the forward address FWDA10 (FWDA10 [b31] = 0), the process proceeds to step S90 shown in FIG. 42D. In this step S90, it is checked whether there is video data between the forward address FWDA9 and the forward address FWDA1 (FWDA10 [b30] = 1). If there is no video data, the process proceeds to step S124 shown in FIG. 42F.

If there is video data in step S90 (FWDA10 [b30] = 1), as shown in step S91, there is no video data in forward address 9 subtracted by forward address 10 by 1 (FWDA9 [b31] = 0). It is checked. If there is video data (FWDA10 [b31] = 1), in step S110, the forward address FWDA9 [b29 = b0] is set to the relative logical block NOWLBN to be searched, and the process returns to step S67. If there is no video data in FWDA9 in step S91 (FWDA9 [b31] = 0), there is video data between forward address FWDA8 to forward address FWDA1 as shown in step S92 (FWDA9 [b30] = 1). ) Is checked. When there is video data (FWDA [b30] = 1], steps S93 to S108 are similarly repeated, and when there is no video, the process proceeds to step S124. When there is video data in steps S93 to S108, the same as in step S110. The process proceeds to any one of steps S111 to S119.

If it is found in step S90 to step S106 that there is no video data in the video unit in the range up to the address, in step S124 shown in FIG. 42F, the address FWDx in which the video object unit does not have video data is found. It is searched in step S124, and it returns to step S67.

In step S109 it is checked whether the cell to which the video object unit VOBU including the corresponding DSI 115 belongs is the last cell of the program chain. That is, it is checked whether the cell 84 is the last cell from the cell reproduction information table C_PBIT shown in FIG. 21 belonging to the program chain information VTS_PGCI shown in FIG. If the last cell 84 is found, 1 is added to the program chain number to which the cell to be searched belongs, as shown in step S121, and the next program chain is set. It is checked in step S122 whether there is a program chain corresponding to this set number. The presence or absence of this program chain is found by referring to the PGCCI table search pointer (VTS_PGCIT_SRP) described in the PGC information (VTS_PGCI) shown in FIG. If there is no corresponding program chain in step S122, execution proceeds to step S51 in FIG. If there is a corresponding program chain in step S121, the entry cell 84 of the program chain is specified, and as shown in step S123, the address C_FVOBUSA of the cell becomes a logical block number to be searched, and the process proceeds to step S57. do.

If the cell 84 to which the video object unit VOBU including the corresponding DSI 115 belongs in step S109 is not the last cell of the program chain, the cell reproduction information table C_PBIT is searched for in the next step and played back. The cell to be specified is specified, and the address of the cell becomes the logical block number to be searched, and the process proceeds to step S57.

The above-described high speed search operation has been described with reference to a flowchart regarding an example of first forward. Regarding the backward, since the same operation refers to the addresses and flags shown in FIGS. 35A and 35C, description thereof is omitted. Incidentally, in the above-described first forward search, steps S90 to S108 shown in FIG. 42D are adopted to decrease the address, but a method of increasing the address may be employed.

Next, another example of the high-speed search will be described with reference to FIG. In Fig. 43, the same reference numerals as those shown in Figs. 42A to 42E denote the same steps and the description thereof will be omitted. In step S62 shown in FIG. 43, the value of the SCR (NV_PCK_SCR) of the NV pack 86 is displayed on the monitor unit 6 or the key operation / display unit 4, and the playback time of the video currently searched by the user. After that, as shown in step S161, the address (VOBU_IP_EA) of the video pack 88 in which the final data of the first I picture in the corresponding DSI shown in FIG. 32 is recorded is sent to the system ROM / RAM unit 52. It is stored and becomes the search target address (ENDLBL). Video data is searched to this address, and video data of an I picture is obtained. When the address is searched, an end command is given to the driver unit 30 to end at that address as shown in step S162, and the reading by the driver 30 is temporarily stopped. In step S164, it is checked whether the transmission of data relating to the I picture is finished. If the data transfer has not been completed, the data transfer is awaited. While the data transfer is completed and the I picture is displayed, it is checked whether there is video data at address FWDA10 at address 10, and whether there is video data therebetween. (FWDA10 [b31, B30] = 00) If there is no video data, the process proceeds to step S80 shown in FIG. 42C. If there is video data, the forward address FWDA10 [b29 = 0] is changed to the search target address NOWLBN in step S66. Thereafter, it is checked whether the high-speed search has ended, for example, whether to stop pressing the FF button of the key operation / display section 4, and if not, step S57 starts with the updated search address, and steps S58 to S66. Is repeated. When the high-speed search ends in step S67 shown in FIG. 42B, step S69 is executed.

The operation of reproducing from a scene 30 minutes after the start of reproducing will be described with reference to FIG. In Fig. 44, flows given the same reference numerals as those in Figs. 37A and 37B show the same operation, and the description thereof is omitted. In the operation flow shown in FIG. 44, after step S11 to step S15 are executed, after a predetermined time, for example, after 30 minutes using the program chain reproduction time PG_PB_TIME shown in FIG. 18 in step S171. The program chain to be determined is determined, and the cell of the program chain is determined to be closest to the time of the purpose and the cell whose value is earlier than the time of the purpose using the cell reproduction time C_PBI shown in FIG. . As shown in step S172, the sub-picture stream number and the audio stream number are sent to the system processor 54 based on the determination of this cell 84, and the start address and program chain number are sent to the system ROM / RAM unit 52. And temporarily stops the system time clock (STC). Next, as shown in step S173, the system CPU unit 50 issues a read command to the driver unit 30 to search the cells to be searched.

In step S174, it is checked whether the NV pack of the head VOBU of the cell has been transmitted. If the NV Pack 86 has not been transmitted, it waits for transmission. When the transfer of the NV pack 86 is completed, the SCR (NV_PCK_SCR) is stored in the system ROM / RAM unit 52. In step S176, the system CPU unit 50 stores the SCR (NV_PCK_SCR) of the NV pack 86 at the address before the address of the transferred NV pack 86 in the system ROM / RAM unit 52. Check. If the SCR (NV_PCK_SCR) of the NV pack 86 of this one previous address is not stored in the system ROM / RAM section 52, there is no comparison target, and as shown in step S177, as shown in step S177, The address is determined and waits for the transfer of the NVpack 86 at the next address. If there is a transmission of the next NV pack 86, it is checked in step S176 whether the SCR (NV_PCK_SCR) of the NV pack 86 has exceeded the desired time. If the target time has not been exceeded, the address of the next NV pack 86 is determined again as shown in step S177, and the transfer of the NV pack 86 of the next address is awaited. If the SCR (NV_PCK_SCR) of the NV pack 86 exceeds the target time in step S176, the SCR (NV_PCK_SCR) already stored in the system ROM / RAM section 52 does not exceed the target time. The SCR (NV_PCK_SCR) closest to the target time is determined. The address of the NV pack 86 having this determined SCR (NV_PCK_SCR) is stored in the system ROM / RAM unit 52. Thereafter, as shown in step S178, a read command is again given to the driver unit 30 to this determined address, and again waiting for the transfer of the NV pack 86 as shown in step S179. When the NV pack is transmitted, the SCR (NV_PCK_SCR) therein is set in the STC as shown in step S180, and the time count of the STC is started. Thereafter, the flow advances to step S21 shown in FIG. 37A, and playback is started from the search cell.

Next, with reference to FIGS. 45 to 50, the image data and the recording method to the optical disc 10 for reproducing the image data in the logical format shown in FIGS. The system will be described.

45 shows an encoder system for generating an image file 88 of a title set 84 encoding image data. In the system shown in FIG. 45, for example, a video tape recorder (VTR) 201, an audio tape recorder (ATR) 202, and a sub-picture player as a source of main image data, audio data, and sub-picture data. source 203 is employed. They generate main image data, audio data and sub-picture data under the control of a system controller (Sys con) 205, which are the video encoder (VENC) 206, the audio encoder (AENC) 207 and the sub-picture encoder, respectively. (SPENC) 208, A / D-converted to these encoders 206, 207, and 208 under the control of the system controller Sys con 205, and encoded in the respective compression schemes, The audio data and the sub picture data (Comp Video, Comp Audio, Comp Sub-pict) are stored in the memory 210, 211, 212.

This main video data, audio data and sub-picture data (Comp Video, Comp Audio, Comp Sub_pict) are outputted to the file formatter (FFMT) 214 by the system controller (Sys con) 205, as described above. In addition to being converted into a file structure of the video data of the system, management information such as setting conditions and attributes of each data is stored in the memory 216 by the system controller Sys con 205 as a file.

The standard flow of the encoding process in the system controller (Sys con) 205 for creating a file from the video data will be described below.

According to the flow shown in FIG. 46, the main video data and audio data are encoded to generate data of the encoded main video and audio data (Comp Video, Comp Auido). That is, when the encoding process starts, as shown in step S70 of FIG. 46, parameters necessary for encoding the main video data and the audio data are set. Some of these set parameters are stored in the system controller Sys con 205 and used in the file formatter FFMT 214. As shown in step S271, the main video data is pre-encoded using the parameter, and a distribution of the most suitable code amount is calculated. As shown in step S272, the main video is encoded based on the code amount distribution obtained by the pre-encoding. At this time, the encoding of the audio data is also performed at the same time. If necessary, as shown in step S273, partial re-encoding of the main image data is executed, and the main image data of the re-encoded portion is replaced. In this series of steps, main video data and audio data are encoded. Further, as shown in steps S274 and S275, the sub-picture data is coded to produce encoded sub-picture data (Comp Sub-pict). That is, the parameters required for encoding the sub-picture data are set identically. A part of the parameter set as shown in step S274 is stored in the system controller Sys con 205 and used as a file formatter (FFMT) 214. Sub-picture data is encoded based on this parameter. This processing encodes sub-picture data.

According to the flow shown in FIG. 47, the encoded main video data, audio data, and sub-picture data (Comp Video, Comp Audio, Comp Sub-pict) are combined and described with reference to FIGS. 4 and 12. The title set structure of the video data is converted. That is, as shown in step S276, the cell as the minimum unit of the video data is set, and the cell reproduction information C_PBI for the cell is created.

Next, as shown in step S277, the configuration of the cells constituting the program chain, the main video, the sub video, and the audio properties are set (a part of these property information is used for the information obtained at the time of encoding each data). ). As shown in FIG. 12, video title set information management table information (VTSI_MAT) and video title set time search map table (VTS_MAPT) 142 including information on a program chain are created. At this time, a video title set direct access pointer table VTS_DAPT is also created as necessary. Encoded main video data, audio data, and sub-picture data (Comp Video, Comp Audio, Comp Sub-pict) are subdivided into a fixed pack, and the NV pack at the head of each VOBU unit so that the data can be reproduced in time code order. Each data cell is arranged while arranging the video object VOB, which is composed of a plurality of cells as shown in FIG. 6, and is formatted into the structure of the title set as a set of video objects.

In the flow shown in FIG. 47, the program chain information is executed using the database of the system controller (Sys con) 205 or re-entering the data as necessary in the process of step S277. It is described as program chain information (PGI).

48 shows a system of a disc formatter for recording a title set formatted as described above on an optical disc. As shown in FIG. 48, in the disc formatter system, these file data are supplied to the volume formatter (VFMT) 226 from memories 220 and 222 in which the created title set is stored. In the volume formatter (VFMT) 266, the management information is extracted from the title sets 84 and 86, the video manager 71 is created, and the logic of the state recorded on the disc 10 in the arrangement order shown in FIG. The data is written. Error correction data is added to the logical data created by the volume formatter (VFMT) 226 and added to the disk formatter ((DFMT) 228) and reconverted into physical data to be recorded on the disk. The physical data created by the disk formatter (DFMT) 228 is converted into recording data actually recorded on the disk, and the modulated record data is recorded on the disk 10 by a recorder 232. A standard flow for creating a disc will be described with reference to Figs. 49 and 50. Fig. 49 shows a flow in which logical data for writing on the disc 10 is created, i.e., in step S280. As shown in the figure, parameter data such as the number of video data files, the arrangement order, the size of each video data file, etc. are initially set, and then the set parameter and each video title as shown in step S281. The video manager 71 is created from the video title set information 281 of the set 72. Thereafter, as shown in step S282, the data corresponds to the video manager 71 and the video title set 72 in order. Arranged according to the logical block numbers, logical data for recording on the disk 10 is created.

Thereafter, a flow of creating physical data for recording on the disk as shown in FIG. 50 is executed. In other words, the logical data as shown in step S283 is divided into a certain number of bytes, and error correction data is generated. Next, as shown in step S284, the logical sector divided into a certain number of bytes and the generated error correction data are combined to create a physical sector. Thereafter, as shown in step S285, the physical sectors are combined to create physical data. In this manner, modulation processing based on a predetermined rule is performed on the physical data generated in the flow shown in FIG. 50 to create recording data. Thereafter, this recording data is recorded on the disc 10.

The above-described data structure is not limited to the case of recording on a recording medium such as an optical disc and distributing it to a user for reproduction. The data structure can also be applied to a communication system as shown in FIG. That is, the optical disc 10 in which the video manager 71, the video title set 72, and the like as shown in FIG. 4 are stored in the playback apparatus 300 in the order shown in FIG. 45 to FIG. The loaded data may be digitally taken out from the system CPU unit 50 of the playback apparatus, and may be sent to the user or the cable subscriber by radio or cable by the modulator / transmitter 310. In addition, data encoded at a provider side such as a broadcasting station is created by the codes shown in FIGS. 45 and 48 and the system 320, and the encoded data are similarly propagated or transmitted by the modulator / transmitter 310. May be sent to the user or the cable subscriber. In such a communication system, the information of the video manager 71 is first modulated by the modulator / transmitter 310 or directly distributed to the user free of charge, and a request from the user or subscriber when the user is interested in the title. In response, the title set 72 is sent by the modulator / transmitter 310 to the user side via radio waves or cables. The transfer of a title is first performed under the management of the video manager 71, and then the video object 95 for the title in the video title set which is reproduced by the title set information 94 is then sent. Is sent. If necessary at this time, a video object 95 for a video title set menu is also sent. The sent data is received by the receiver / demodulator 400 on the user side and processed as the playback process described above by the system CPU unit 50 of the playback apparatus on the user or subscriber side shown in FIG. Is played.

In the transmission of the video title set 72, the video object sets 95 and 96 are transmitted in units of the video object unit 85 shown in FIG. In this video object unit 85, an NV pack 86 in which video reproduction and search information is stored is arranged at the head thereof. In addition, since the address of the video object unit 85 to be played back and forth on the basis of the video object unit 85 to which the NV pack 86 belongs is described in this NV pack 86, Even if the video object unit 85 is missing for some reason during the transmission, video data can be reliably reproduced on the user side by requesting the retransmission of the missing video object unit 85. In addition, even if the transfer is not performed in the playback order of the video object unit, the system ROM / RAM unit 52 on the user side holds the correct program chain playback information, and the playback order is referred to by referring to the address data of the NVpack 86. The system CPU unit 50 can instruct.

In the above description, the video object unit has been described as a data sequence including video, audio, and sub-pictures, but any one of video, audio, and sub-pictures may be included, and may be composed of only audio packs or sub-picture packs.

As described above, the navigation pack stores information for controlling the reproduction and search of data packets to be reproduced, such as compressed video and audio, which are defined in the MPEG system layer 2 and stored in the navigation pack. It is arranged at the head and data is transmitted based on the navigation pack, so that reliable playback is possible. In addition, since the address of another navigation pack is described in this navigation pack, special playback such as an angle change, video skipping, fast forward playback, and fast forward reverse playback is possible. In addition, since data is transmitted based on the navigation pack in the communication system, reliable data transmission is possible.

Claims (58)

A method of reproducing reproduction data with navigation data, comprising: a plurality of data units which are to be reproduced in time series, each of which is to be reproduced within a predetermined time range, the data unit being in audio, video and sub-pictures; A plurality of data pack strings compressed and packetized with at least one of the reproduction data including at least one of them, and located at the head of the data pack string, and containing navigation information describing the reproduction information of the data pack and a relationship with other data units. Receiving playback data consisting of a navigation pack; Converting the data unit into a reproduction signal by referring to the navigation information of the reproduction data; Reproducing the reproduction signal. The method of claim 1, wherein the navigation pack includes time information at which a data unit including the navigation pack is reproduced, and a reproduction signal is reproduced according to the time information. 2. The method of claim 1, wherein the navigation pack includes address information describing its own address. The method of claim 1, wherein the navigation pack includes a final address of a data unit to which it belongs. 2. The navigation pack of claim 1, wherein the navigation pack includes angle information about an address of a data unit before a change of an angle for switching a scene to be played back, and when the angle is changed, the address is referred to and the angle is changed. Way. The method according to claim 5, wherein the angle information has a predetermined description that there is no data unit before the angle change. 6. The method of claim 5, wherein the angle information includes information about an address of a data unit to be reproduced later in time than the data unit to which the navigation pack belongs. 6. The method of claim 5, wherein the angle information includes information about an address of a data unit to be reproduced in time before the data unit to which the navigation pack belongs. 2. The method of claim 1, wherein the navigation pack includes end address information about an end address of a data unit that includes the navigation pack, wherein a next data unit is obtained with reference to this end address. The end of claim 1, wherein the navigation pack describes an address in which the minimum data that can constitute an image of an I picture in the data unit is stored when the data unit includes video data specified in MPEG. And at least data for reproducing an I picture with reference to this address is obtained. 2. The navigation pack as claimed in claim 1, wherein the navigation pack is configured to synchronize at least one of audio and sub-pictures reproduced in synchronization with the video data when the data unit includes video data and also includes at least one of audio and sub-pictures. Including information. The reproduction unit according to claim 1, wherein when the data unit to which the navigation pack belongs is set to the reproduction order number 0, the navigation pack reproduces the data unit (s) which is reproduced at least 15 times before and after the reproduction unit in the reproduction order. And a reproduction information describing the addresses of the data units of the 20th, 30th, 60th, 120th, and 240th steps. 13. The navigation pack of claim 12, wherein the navigation pack includes search information for continuously describing addresses of data units to be searched a predetermined number of times to be continuously played back and forth based on the address of the navigation unit. A data unit is searched for by referring to. The method according to claim 1, wherein the search information is given a predetermined description at the address when there is no data unit to be searched. 15. The method of claim 14, wherein the search information includes a flag indicating whether a data unit to be searched for includes video data. The method of claim 15, wherein the search information includes a flag indicating whether video data is included in a data unit between an address of a data unit to be searched and an address of a corresponding navigation pack. The method as claimed in claim 1, wherein the reproduction data includes a plurality of cell data in which data units to be reproduced in time series are stored, respectively, and a program referring to the cell data is reproduced. 2. The method of claim 1, wherein the reproduction data includes a table in which a reproduction program that defines the reproduction order of the cells is described. The program data according to claim 1, wherein the reproduction data includes a table in which a plurality of reproduction programs in which the reproduction order of the cells is determined is described, and which describes reproduction in various aspects in association with the plurality of reproduction programs. Method comprising a. A device for reproducing playback data with navigation data, comprising: a plurality of data units which are to be reproduced in time series, each of which is to be reproduced within a predetermined time range, the data unit being an audio, video, and sub-picture. A plurality of data pack strings compressed and packetized with at least one of the reproduction data including at least one of them, and located at the head of the data pack string, and containing navigation information describing the reproduction information of the data pack and a relationship with other data units. Means for taking out the reproduction data from the recording medium on which the reproduction data constituted of the navigation pack is recorded; And means for reproducing a reproduction signal by converting a data unit into a reproduction signal with reference to the navigation information of the retrieved reproduction data. 21. The apparatus according to claim 20, wherein the navigation pack includes time information at which a data unit containing the navigation pack is reproduced, and a reproduction signal is reproduced by the reproduction means in accordance with the time information. 21. The apparatus of claim 20, wherein the navigation pack includes address information describing its own address. 21. The apparatus of claim 20, wherein the navigation pack includes a final address of a data unit to which it belongs. 21. The apparatus of claim 20, wherein the navigation pack includes angle information about an address of a data unit before a change of an angle for switching a scene to be reproduced, and when the angle is changed, the address is referred to and the angle is changed. Device. 25. The apparatus of claim 24, wherein the angle information includes a predetermined description of the absence of a data unit prior to angle change. An apparatus according to claim 24, wherein the angle information includes information about an address of a data unit to be reproduced later in time than the data unit to which the navigation pack belongs. 27. The apparatus of claim 25, wherein the angle information includes information about an address of a data unit to be reproduced in time before the data unit to which the navigation pack belongs. 21. The apparatus of claim 20, wherein the navigation pack includes end address information about an end address of a data unit that contains the navigation pack, wherein a next data unit is obtained with reference to this end address. 21. The end according to claim 20, wherein the navigation pack describes an address in which the minimum data capable of constituting an image of an I picture is stored in the data unit when the data unit includes video data specified in MPEG. And at least data for reproducing an I picture with reference to this address is obtained. 21. The navigation pack as claimed in claim 20, wherein the navigation pack includes at least one of audio and sub-pictures reproduced in synchronization with the video data when the data unit includes video data and at least one of audio and sub-pictures. And at least one of audio and sub-pictures simultaneously with the video with reference to the synchronization information. 21. The navigation pack as claimed in claim 20, wherein the navigation pack includes search information continuously describing addresses of data units to be searched a predetermined number of times to be reproduced continuously before and after based on the address of the navigation unit. Wherein the data unit is searched for. 21. The reproduction unit according to claim 20, wherein, when the data unit to which the navigation pack belongs is set to the reproduction order number 0, the navigation pack reproduces the data unit (s) which is reproduced at least fifteen times back and forth in the reproduction order based on the data unit. And playback information describing the addresses of the 20th, 30th, 60th, 120th, and 240th data units. 32. The apparatus according to claim 31, wherein the search information includes a predetermined description at the address when there is no data unit to be searched for. 34. The apparatus of claim 33, wherein the search information includes a flag indicating whether a data unit to be searched for includes video data. 34. The apparatus of claim 33, wherein the search information includes a flag indicating whether video data is included in a data unit between an address of a data unit to be searched and an address of a corresponding navigation pack. 21. The apparatus according to claim 20, wherein the reproduction data includes a plurality of cell data in which data units to be reproduced in time series are stored, respectively, and a program referring to the cell data is reproduced. 21. The apparatus according to claim 20, wherein the reproduction data includes a table in which a reproduction program that defines the reproduction order of the cells is described. 38. The program data according to claim 37, wherein the reproduction data includes a table in which a plurality of reproduction programs in which reproduction order of the cells is determined is described, and which is reproduced in various aspects in association with the plurality of reproduction programs. Apparatus comprising a. A method of reproducing reproduction data with navigation data, comprising the steps of: acquiring the contents of a table in which second reproduction information relating to reproduction of a data cell is described; A method of sequentially acquiring data cells and converting them into reproduction signals by referring to the description of the table, wherein each data cell is subjected to reproduction in succession in time series, and each of the plurality of data cells is to be reproduced within a predetermined time range. A collection of data units, comprising: a plurality of data pack sequences in which the data unit compresses and packetizes playback data including at least one of audio, video, and sub-picture, and first reproduction information relating to reproduction of the data unit at the head thereof A conversion step consisting of a navigation pack described therein; Reproducing a reproduction signal. 40. The method of claim 39, wherein the second reproduction information includes the address of the head data unit in each data cell. 40. The method of claim 39, wherein the second reproduction information includes the address of the last data unit in each data cell. 40. The method of claim 39, wherein the second reproduction information includes a reproduction time of the cell. 40. The method of claim 39, wherein the acquiring step includes transmitting a data cell to be reproduced after a predetermined time with reference to the reproduction time. 40. The method of claim 39, wherein the table describes second reproduction information of the cells in the order of reproduction of the cells. 40. The method of claim 39, wherein said cell is attached with an identification number identifying itself. 40. The method according to claim 39, wherein the navigation pack in which the first reproduction information is described describes the reproduction information of the data pack and the relationship with other data units. 40. The apparatus of claim 39, wherein the navigation pack includes time information at which a data unit including the navigation pack is reproduced, and the acquiring step is to be reproduced after a predetermined time with reference to the reproduction time of the cell and the time information of the data unit. Transmitting a data cell to be made. 48. The method of claim 47, wherein the obtaining step further includes specifying a time to specify an address of a data unit to be reproduced at that time. 1. An apparatus for reproducing from a recording medium provided with a navigation pack, comprising: a plurality of data cells in which the reproduction order can be specified, each data cell being subjected to reproduction in succession in time series, each of which is within a predetermined time range A collection of a plurality of data units to be reproduced, the plurality of data pack sequences in which the data unit compresses and reproduces the reproduction data including at least one of audio, video, and sub-pictures, and at the beginning of the reproduction of the data unit. A data cell composed of a navigation pack in which first reproduction information is described, a table in which second reproduction information relating to reproduction of each data cell is described, and second reproduction information of the table is received from the recording medium and stored therein; Means for converting the data cells from the recording medium into means of a reproduction signal; Means for transmitting a data cell to said converting means according to the stored second reproduction information. 50. The apparatus of claim 49, wherein the second reproduction information includes the address of the head data unit in each data cell. 50. The apparatus of claim 49, wherein the second reproduction information includes the address of the last data unit in each data cell. 50. The apparatus of claim 49, wherein the second reproduction information includes a reproduction time of the cell. 50. The apparatus according to claim 49, wherein said transmission means transmits data cells to be reproduced after a predetermined time with reference to the reproduction time to conversion means. 50. The apparatus of claim 49, wherein the table describes second reproduction information of the cells in the order of reproduction of the cells. 50. The apparatus of claim 49, wherein the cell is attached with an identification number identifying itself. The apparatus according to claim 49, wherein the navigation pack in which the first reproduction information is described describes the relationship between the reproduction information of the data pack and other data units. 50. The apparatus according to claim 49, wherein the second reproduction information includes a reproduction time of the cell, the navigation pack includes time information at which a data unit including the navigation pack is reproduced, and the transmitting means reproduces the cell. And a data cell to be reproduced after a predetermined time with reference to the time and time information of the data unit to the converting means. 50. The apparatus of claim 49, further comprising means for specifying a time to specify an address of a data unit to be reproduced at that time.