JP2001352528A - Data broadcast transmission / reception system and transmission / reception method, and data broadcast transmission device - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To provide a data broadcast transmission / reception system in which a transmission device can precisely control a point in time at which a reception device presents data broadcast content to be viewed by a viewer. SOLUTION: At time t (7: 13: 0), a video / audio AV01 related to a data broadcast content C01 is set to C0.
In accordance with the schedule for switching to AV02 related to AV2, the transmitting device starts transmitting data broadcast content C02 related to video / audio AV02 before the program switching time t, and transmits message 02 when time t arrives. . The receiving device transmits the data broadcast content C
02 is received, an image forming process based on C02 is performed, but not in a visible state. The data broadcast content is presented in an invisible state.
When receiving the message 02 thereafter, the receiving device sets the data broadcast content C02 in the invisible state to the visible state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data broadcast transmitting / receiving system comprising a transmitting device for transmitting data broadcast contents and a receiving device for receiving the transmitted data broadcast contents and presenting the data broadcast contents to a viewer.

[0002]

2. Description of the Related Art Digital satellite broadcasting that has been put into practical use in recent years has been developed according to ISO / IEC13818.
PEG2 (Moving Picture Expert)
sGroup2) Video and audio are broadcast in a transmission format conforming to the transport stream.

In the MPEG2 transport stream, not only video and audio but also other data can be multiplexed. By utilizing this, characters, graphics, and the like mainly used for superimposed display on video are used. 2. Description of the Related Art Data broadcasting, which includes a button and the like and multiplexes data broadcasting content having contents related to video and audio into video and audio and broadcasts the same, has been put to practical use.
In a data broadcasting transmission / reception system for transmitting and receiving data broadcasting, a transmitting device repeatedly broadcasts a group of data broadcasting contents, and a receiving device for data broadcasting selectively receives and presents data broadcasting contents according to a selection operation of a viewer. Simulates interactivity.

[0004] The contents of data broadcasting include, for example, news programs as video and audio, commentary information related to news as data broadcasting contents, and commercials (CM) as video and audio, and CM products as data broadcasting contents. Information and the like for allowing the user to make purchases are broadcast. The data broadcast receiving device receives the data broadcast content and temporarily stores the data broadcast content in an internal memory before receiving and presenting the data broadcast content, and accesses each data in the data broadcast content such as characters, graphics, and the like. Calculate two-dimensional coordinates on the screen of characters, figures, etc., expand the data of characters, figures, etc. into the frame memory for storing images, and then display the image signal based on the data in the frame memory. A series of processing of outputting to a device or the like is performed.

[0005]

Conventionally, it usually takes several seconds or more for a receiving apparatus to receive a data broadcast content and store it in a memory. Further, even after storing the data broadcast content in the memory, it takes several seconds to complete each process until the two-dimensional coordinates of the characters, graphics, etc. on the screen are calculated. , Figures and the like.

For this reason, it becomes difficult for the transmitting device to accurately control the presentation start timing of the data broadcast content on the receiving device side. For example, assuming that video and audio to be broadcast are switched from a news program to a CM, when the transmitting apparatus starts broadcasting the video and audio of the CM following the news program, it starts broadcasting data broadcasting content related to the CM. In such a case, the receiving apparatus starts presenting the data broadcast content related to the CM with a delay after the presentation of the video and audio of the CM. In order to improve this, even if the transmitting device starts broadcasting data broadcasting content related to the CM a little earlier than the start of the CM broadcasting, if the broadcasting device starts broadcasting, the receiving device will not be able to connect the video and audio of the CM and the CM. It is very difficult to determine whether presentation with the data broadcasting content that has been started can be started at the same time.

Accordingly, the present invention has been made in view of such a problem, and a transmitting apparatus can accurately control a point in time at which a receiving apparatus presents a data broadcast content to a viewer. It is an object of the present invention to provide a simple data broadcasting transmission / reception system. It is another object of the present invention to provide a data transmission / reception method used in the data broadcast transmission / reception system and a transmission device configuring the data broadcast transmission / reception system.

[0008]

In order to achieve the above object, a data broadcast transmitting / receiving system according to the present invention comprises a transmitting apparatus for transmitting data broadcast contents, and a receiving apparatus for receiving and presenting the transmitted data broadcast contents. A data broadcast transmission / reception system, comprising: a transmitting apparatus, wherein the transmitting apparatus obtains a presentation scheduled time at which the data broadcasting content is to be presented; Data broadcast content transmitting means for starting transmission, and message transmitting means for transmitting a presentation start instruction message when the scheduled presentation time has arrived, wherein the receiving device receives the transmitted data broadcast content and A data broadcast content receiving / presenting means for presenting broadcast content in an invisible state; Upon receiving the start instruction message, characterized in that it comprises a data broadcast content visualizing unit that the data broadcast content that is invisible to visible.

[0009] The "presenting the data broadcast content in an invisible state" means that the process related to the presentation of the data broadcast content is performed until it is not possible to present the data broadcast content in a visible state. It means to keep it in a state. According to the above configuration, the processing related to the presentation of the data broadcast content is performed to some extent in the receiving device before the scheduled presentation time, so that the data broadcast content is immediately visible to the viewer at the scheduled presentation time. Therefore, the program creator or the like can specify the time at which the data broadcasting content is presented in the receiving device with high accuracy by giving the scheduled presentation time to the transmitting device.

[0010] Further, a data broadcast transmitting / receiving method according to the present invention is a data broadcast transmitting / receiving method used in a system comprising a transmitting apparatus for transmitting data broadcast contents and a receiving apparatus for receiving and presenting the transmitted data broadcast contents. A scheduled presentation time obtaining step of obtaining a scheduled presentation time at which the data broadcasting content is to be presented, and a data broadcasting content transmitting step of starting to transmit the data broadcasting content before the scheduled presentation time arrives at the transmitting device. A message transmitting step of transmitting a presentation start instruction message when the scheduled presentation time has arrived at the transmitting device; and a receiving device for receiving the transmitted data broadcast content and displaying the data broadcast content in an invisible state. Data broadcasting content reception presentation stage And flop, in the receiving apparatus, when receiving the transmitted presentation start instruction message, characterized in that it comprises a data broadcast content visualizing step of the data broadcast content that is invisible to visible.

According to the above configuration, since the processing related to the presentation of the data broadcast content is performed to some extent in the receiving device before the scheduled presentation time, the data broadcast content can be immediately viewed by the viewer when the scheduled presentation time arrives. become. Further, a transmission device according to the present invention is a transmission device that transmits a data broadcast content to a reception device that receives and presents the data broadcast content, and acquires a presentation scheduled time at which the data broadcast content is to be presented. First control including an instruction to the presentation-scheduled-time acquiring means and an instruction to the receiving device to start receiving the data broadcast content and to present the data broadcast content as an object to be presented when the invisible presentation instruction message is received. Image forming information for forming an image to be displayed from the start of transmission of the preceding data broadcast content including information, from the start of the transmission of the preceding data broadcast content, and from before the scheduled presentation time, and That the image should be formed and invisible based on the image formation information when it is presented Data broadcast content transmitting means for starting to transmit data broadcast content including an instruction and second control information including an instruction to make the invisible image visible when receiving the presentation start instruction message Message transmission means for transmitting an invisible presentation instruction message when the data broadcast content transmission means starts transmitting data broadcast content, and transmitting a presentation start instruction message when the scheduled presentation time has arrived. And

According to the above configuration, when the receiving device has a so-called browser including a script processing system, the receiving device is controlled to present the data broadcast content to the viewer immediately at the scheduled presentation time. Will be able to

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A data broadcast transmitting / receiving system according to an embodiment of the present invention will be described below with reference to the drawings. << Embodiment 1 >> FIG. 1 is a diagram showing a schematic configuration of a data broadcast transmission / reception system according to Embodiment 1 of the present invention.

As shown in FIG. 1, the data broadcast transmission / reception system basically includes a broadcasting station 90 for transmitting a digital broadcast and a receiving device 200 for receiving the broadcast. The broadcast station 90 includes a transmission device 100 that transmits video / audio and data broadcast content. The transmitting device 100
U, a computer having a memory, etc., a hard disk device, an encoder, a modulation device, and the like.

Thus, for example, a news program is broadcast as video and audio, and commentary information related to news is broadcast as data broadcast content. The broadcasted video / audio and data broadcast contents are transmitted to the receiving device 200 via the relay station 91 which is a satellite. The receiving device 200 is a device that receives a broadcast wave, and combines and presents video / audio and data broadcast content. The receiving device is usually installed in each house or the like, and it is assumed that a large number of receiving devices exist.

Here, the data broadcast content includes an image composed of characters, figures, and the like for presentation to a viewer of the broadcast, a sound such as a sound effect, and the like. And a control document which is information defining an operation to be performed when an operation by the user is received.
The presentation means displaying a video and an image on a display device and reproducing sound from a speaker or the like, or outputting a signal for displaying the video and the image and a signal for reproducing the audio. The presentation of the data broadcasting content is to display images such as characters and graphics in the data broadcasting content, and to reproduce the sound if the data broadcasting content includes sound such as sound effect, or Outputting a signal for displaying the image or reproducing the sound.

Accordingly, the viewer can view the broadcast through a display device with speakers connected to the receiving device. << Configuration of Transmitting Apparatus >> FIG. 2 is a functional block diagram of the transmitting apparatus 100. As shown in the figure, the transmitting apparatus 100 functionally includes a schedule information storage unit 101, a scheduling unit 102, a video / audio storage unit 103, a video / audio transmission unit 104, a data broadcast content storage unit 105, and a data broadcast content transmission unit 106. , The message sending unit 107,
A multiplexing unit 108 and a transmitting unit 109 are provided.

Here, the schedule information storage unit 101
Is an area of a storage medium such as a memory, a hard disk, or the like that stores schedule information indicating a time to be presented on the receiving device side with respect to each content of each program unit of video / audio and data broadcast content. Here, the program refers to a group of units intended by the program creator for video / audio or data broadcast content. Programs are generally unitary in content.
For example, each video / audio such as news and CM is one unit of a program, and each data broadcast content such as news-related information and CM-related information is one unit of a program.

The scheduling section 102 determines the transmission schedule of each of the video / audio, the message and the data broadcast content based on the schedule information stored in the schedule information storage section 101, and respectively determines the video / audio transmission section 104 and the message transmission. The unit 107 has a function of transmitting data to the data broadcast content transmission unit 106. Each schedule will be described later in detail.

A video / audio storage unit 103 stores a video / audio of each program produced in advance,
This is an area of a video tape or the like. Video / audio transmission unit 104
Reads the video / audio stored in the video / audio storage unit 103 in accordance with the schedule transmitted to the scheduling unit 102, compresses and encodes the video / audio as video stream data and audio stream data, and divides the video PES ( Packetized
Elementary Stream) and audio PE
It has a function of shaping it into S and sending it to the multiplexing unit 108.

The data broadcast content storage unit 105 is an area such as a hard disk that stores data broadcast content of each program produced in advance. The data broadcasting content transmission unit 106
The data broadcast content stored in the data broadcast content storage unit 105 is read out in accordance with the schedule transmitted to the mobile terminal, that is, various material data such as characters and graphics constituting the data broadcast content and control documents are read out and transmitted. It has a function of shaping it into a module format and repeatedly sending it to the multiplexing unit 108.

Message sending section 107 has a function of sending a message to multiplexing section 108 according to the schedule transmitted to scheduling section 102. The message includes a message ID for identifying the message. Since the data amount of the message is considerably smaller than the data broadcast content of one program, the reception device can complete the reception of the message immediately after the message is broadcast.

The multiplexing unit 108 includes the video / audio transmitting unit 10
4. MPEG2 configured by time-division multiplexing each data transmitted from the data broadcasting content transmitting unit 106 and the message transmitting unit 107 to be composed of 188-byte packets
The data is converted into a transport stream format,
9 has the function of telling it. Note that a packet ID (PID) corresponding to the stored content is added to each packet. For the MPEG2 transport stream,
It is described in detail in the ISO / IEC13818 (MPEG2 system) standard.

The transmitting section 109 has a function of applying a modulation suitable for broadcasting to the MPEG-2 transport stream transmitted from the multiplexing section 108 to generate a broadcasting signal, and outputting the broadcasting signal to a broadcasting antenna. << Transmission Schedule >> FIG. 3 is a diagram showing a configuration and an example of contents of schedule information stored in the schedule information storage unit 101.

The schedule information 150 is information serving as a reference for determining the broadcast timing of the video / audio and data broadcast contents and messages corresponding to each program. As shown in FIG.
51, information correlating the video / audio management code 152 and the data broadcast content management code 153. Here, the start time 151 indicates a time at which presentation of one program of the video / audio and data broadcast content should be started so that the viewer can recognize the program on the receiving device side.

The video / audio management code 152 is a code for identifying video / audio of a program unit to be presented at the corresponding start time, and the data broadcast content management code 153 is presented at the corresponding start time. This is a code for identifying the data broadcast content for each program to be performed. In the example shown in the figure, the video / audio AV01 and the data broadcast content C01 are set at 7: 00: 00: 00.
, The video / audio AV02 and the data broadcast content C02 are presented at 7: 13: 0, and the video / audio AV03 and the data broadcast content C03 are presented at 7: 15: 0.

For example, the video / audio AV01 is a news program, the data broadcast content C01 is an image or the like indicating commentary information related to news, the video / audio AV02 is a commercial for commercials, and the data broadcast content C02 is a commercial. An image or the like including a user interface that enables the viewer to purchase the indicated product. FIG. 4 is a diagram showing a configuration and a content example of a data broadcast content transmission schedule determined by the scheduling unit 102.

Data broadcast content transmission schedule 1
Reference numeral 70 denotes information indicating the broadcast timing of the data broadcast content corresponding to each program, which is determined by the scheduling unit 102 based on the schedule information. The data broadcast content transmission schedule 170 is information in which a transmission time 171 and a data broadcast content management code 172 are associated with each other as shown in FIG.

Here, the transmission time 171 is information indicating a period during which a group of data broadcast contents are repeatedly transmitted, with a start time and an end time of the period, and the data broadcast content management code 172 corresponds to the period. This is a code for identifying the data broadcast content of the program unit to be transmitted at the transmission time. The example shown in the figure is an example of a data broadcast content transmission schedule determined based on the schedule information illustrated in FIG. 3, and data broadcast is performed in a period from 7:00:00 to 7:12:45. The content C01 is repeatedly broadcast, and 7
Data broadcast content C01 and data broadcast content C in the period from 12:45 to 7: 13: 0
02 and 7: 13: 0 after 7:14
Data broadcasting content C02 in the period up to minute 45
Is repeated and after 7:14:45, 7: 15: 0
The data broadcast content C02 and the data broadcast content C03 are repeatedly broadcast during the period up to
This shows that the data broadcast content C03 is repeatedly broadcast in a period from 5 minutes 0 seconds to 7:27:45.

It should be noted that the band used for repeatedly broadcasting the data broadcast content is constant, and the data broadcast content transmitting unit 106 is adapted to broadcast two data broadcast contents in a certain period based on the data broadcast content transmission schedule. Allocates the fixed band for broadcasting of each data broadcast content. FIG. 5 is a diagram illustrating a configuration and an example of the content of a message transmission schedule determined by the scheduling unit 102.

The message sending schedule 160 includes a sending time 161 and a message ID 162 as shown in FIG.
Is information associated with. Here, the sending time 161
Is information indicating a message sending time, and the message ID 162 is a message ID for identifying a message to be sent at the corresponding sending time.

The example shown in FIG. 3 is an example of a message transmission schedule determined based on the schedule information shown in FIG.
Broadcasts a message whose message ID is 01, and broadcasts a message whose message ID is 02 at 7: 13: 0.
This indicates that a message having a message ID of 01 is broadcasted at 4:45, and a message having a message ID of 02 is broadcasted at 7: 15: 0.

<< Control Document in Data Broadcast Content >> FIG. 6 is a diagram showing an example of the content of a control document in the data broadcast content C01. FIG. 7 is a diagram showing an example of the content of the control document in the data broadcast content C02 corresponding to the program following the data broadcast content C01.

The control documents 301 and 302 are data described using the Markup language in order to determine the contents of presentation of data broadcast contents and operations corresponding to viewer operations, and so on. It is interpreted by the browser. In the figure, portions of the contents of the control documents 301 and 302 that are not important for describing the present invention are omitted.

In the control documents 301 and 302, "<scri"
The portion from “pt>” to “</ script>” is a command description, that is, a script to be interpreted and executed by a script processing mechanism such as an interpreter included in the browser on the receiving device side. “LaunchDoc” in the control document 301 is a command description that specifies the data broadcast content specified as a parameter as an interpretation target of the browser and presents the data broadcast content in accordance with the result of the interpretation. If it has not been received yet, it is a command description meaning that it is first received, interpreted, and presented according to the interpretation result. Therefore, "LaunchDoc (" C02 ")"
Indicates that the data broadcast content C02 is interpreted and presented according to the result of the interpretation. Also, "func1"
Is a function name of a function having the content of the LaunchDoc instruction. Note that interpreting the data broadcast content means interpreting a control document in the data broadcast content.

In the control documents 301 and 302, "<e
part> to “</ event>”
This is a description for specifying an event type, a function to be activated when an event occurs, and the like for an event that triggers a function to be driven on the receiving device side. “<Item” in the control document 301
type = “EventMessageFired”
message_id = "01" onOccur
= "Func1 ()">>"indicates that the message ID is 0
This indicates that an instruction constituting a function having a function name of func1 is to be executed when an event whose content is to receive the message 1 is generated.

In the control documents 301 and 302, "<b
The part from “body>” to “</ body>” is a description indicating the presentation content and presentation format of the data broadcast content, and is information for specifying an image such as a character or a figure. “<Initial_stat” in the control document 301
e "Visible">>"indicates that the initial state regarding display of an image in the data broadcast content is a visible state.

In the control document 302, "SetVis"
“ibility (“ Visible ”);” is a command description for changing an image such as a character or a graphic in the data broadcast content displayed in an invisible state to a visible state. “Func2” is the SetVisibi
This is a function name of a function having a content of a lite instruction. “<Item type =” EventM ”in the control document 302
messageFired ”message_id =”
02 "onOccur =" func2 () ">>"
Indicates that an instruction constituting a function having a function name of func2 is executed when an event having a content of receiving a message with a message ID of 02 occurs.

In the control document 302, "<form>
<Input type = “submit” value
= “Purchase” >></form> ”is a description indicating a“ Purchase ”button for accepting input from a viewer who wants to purchase a product advertised in a CM, for example, and“ <ini ”.
tial_state "InVisible" / >>"
Indicates that the initial state of the display of the “buy” button and the like is invisible. Note that the "buy" button and the like have a color that can be recognized by the viewer if it is visible.

It should be noted that data broadcast contents including images such as characters and figures are displayed with a limited description of "invisible state" such as "display in invisible state" or "present in invisible state". The expression "" or "present" is a state in which a series of processing required to display an image is executed only halfway, and the image is displayed so that the viewer can visually recognize it. It means that it is not reached. Therefore, the image presented in the invisible state is in a state where it is suppressed from being displayed so as to be seen by the viewer.

<< Operation of Transmitting Apparatus >> FIG.
11 is a flowchart showing the operation of the "0". Hereinafter, the operation of the transmitting apparatus 100 will be described with reference to FIG. 8 on the assumption that the schedule information storage unit 101 stores the schedule information 150 illustrated in FIG.

First, the scheduling section 102 of the transmitting apparatus 100 acquires the schedule information stored in the schedule information storage section 101 (step S1).
1). After acquiring the schedule information, the scheduling unit 102 determines a data broadcast content transmission schedule based on the schedule information (step S12). Specifically, the scheduling unit 102
A little before, for example, 15 seconds before, the time set as the start time of the data broadcast content of a program unit in the schedule information is defined as the transmission start time of the data broadcast content, and the transmission end time is set as the transmission end time. Is determined as the start time of the data broadcast content corresponding to the next program. As a result, a data broadcast content transmission schedule 170 as illustrated in FIG. 4 is determined.

After determining the data broadcast content transmission schedule, the scheduling section 102 determines a message transmission schedule based on the schedule information (step S13). Specifically, the scheduling unit 102 sets the transmission start time of the data broadcast content in step S12 to a time immediately before the time set as the start time of the data broadcast content for a certain program in the schedule information. The time is defined as the transmission time of the message with the message ID 01, and the time defined as the start time of the data broadcast content for a certain program in the schedule information is defined as the transmission time of the message with the message ID 02. As a result, the message transmission schedule 16 as illustrated in FIG.
0 is defined.

After determining the message sending schedule, the scheduling section 102 sets the schedule information 1
At each start time indicated by 50, a schedule for transmitting the corresponding video / audio is transmitted to the video / audio transmitting unit 104, a data broadcasting content transmitting schedule 170 is transmitted to the data broadcasting content transmitting unit 106, and a message transmitting schedule 160 is transmitted to the message. Each of the units 104, 106, and 107, which have been notified to the unit 107 and notified of the schedule, respectively perform the video PES according to the schedule.
The PES, the audio PES, the data broadcasting contents in the form of a module, and the message are sent to the multiplexing unit 108, and the multiplexing unit 108 multiplexes the received data to form an MPEG.
The transmission unit 109 converts the transmitted MPEG2 transport stream into digital data and outputs the digitally modulated MPEG2 transport stream to the broadcast antenna (step S14).

The broadcast signal output from the transmitting section 109 is broadcast through the broadcast antenna of the broadcast station 90. << Configuration of Receiving Apparatus >> FIG. 9 is a configuration diagram of the receiving apparatus 200. In the figure, components that are not important in the present invention are omitted.

The receiving apparatus 200 is a so-called set-top box, and includes a tuner 201, a demodulation circuit 202, a transport (TS) decoder 203, and an AV decoder 2.
04, a ROM 205, a RAM 206, a CPU 207, a display processing circuit 208, and a sound processing circuit 209. Here, the tuner 201 is a device that receives a broadcast signal broadcast from the broadcast station 90 or the like under the control of the CPU 207.

The demodulation circuit 202 is a circuit for demodulating the digitally modulated MPEG2 transport stream received by the tuner 201 and transmitting the demodulated MPEG2 transport stream to the TS decoder 203. The TS decoder 203 includes a demodulation circuit 202
This is to separate and extract data that matches the filter conditions specified by the CPU 207 from the MPEG2 transport stream received from. Note that the filter condition is specified by a PID or the like.

[0048] Specifically, the TS decoder 203
The video stream data and the audio stream data are separated and extracted from the EG2 transport stream, input to the AV decoder 204, and the PID specified by the CPU 207.
If the data broadcast content specified by the above can be separated and extracted by receiving the data broadcast content, the content is stored in the RAM 206, the completion of storage is notified to the CPU 207 by an interrupt, and the message specified by the PID, the message ID, and the like designated to the CPU 207 is received. If the data can be separated and extracted as a result, the fact is notified to the CPU 207 by interruption.

The AV decoder 204 is a so-called MPEG
The decoder is a decoder that decompresses the input video stream data and audio stream data while referring to the time stamp attached to each frame, and outputs a video signal and an audio signal. ROM205
Is a memory that stores a control program for controlling each unit of the receiving device 200. The CPU 207 executes the control program so that the receiving device 20
0 is controlled.

The RAM 206 is a memory used to store data required when the CPU 207 executes the control program.
Is a memory in which the data broadcast contents separated and extracted are stored. Upon receiving an instruction from the CPU 207, the display processing circuit 208 assembles the on-screen display graphics (OSD) of the data broadcast content, that is, an image composed of characters, graphics, and the like to be displayed on the screen of the display device. Circuit.

The sound processing circuit 209 includes a CPU 207
Is a circuit for outputting, for example, data conversion and the like, such as sound effects to be output in the data broadcasting content, in response to the instruction. Note that the receiving device 200
Audio output signal from V decoder 204 and sound processing circuit 2
The output signal of the display processing circuit 208 is synthesized with the output signal of the AV decoder 204 and output.

The receiving apparatus 200 having the above configuration will be described below.
The mechanism for processing data broadcast content in the above will be described in detail focusing on the functional aspect. Here, description of sounds such as sound effects in data broadcasting contents will be omitted, and description will be made focusing on images such as characters and figures. FIG.
0 is a functional block diagram showing a data broadcast content processing mechanism of the receiving device 200.

The data broadcast content processing mechanism 220
As shown in the figure, it mainly comprises a TS decoder 203, a display processing circuit 208, a data broadcast content storage section 230, and a data broadcast content interpretation section 240. The TS decoder 203 and the display processing circuit 208 are as described above. Note that the display processing circuit 208 has a frame memory 250 for storing an image assembled based on the control document of the data broadcast content. An image composed of characters, figures, buttons, and the like as elements can be developed in the frame memory 250, the developed image can be made visible or invisible, and the developed image can be cleared. Displaying an image in an invisible state is realized by the display processing circuit 208 by developing the image only in the frame memory 250 and not outputting the image signal to the outside.

The process of developing an image composed of figures and the like in the frame memory usually requires access to various data such as figures and the processing of two-dimensional coordinate calculation on the screen of the figures and the like. Take it. On the other hand, it takes almost no time to change the already developed image from the visible state to the invisible state or to change the already developed image from the invisible state to the visible state.

The data broadcast content storage section 230 stores
This is an area in the RAM 206 for storing the data broadcast contents separated and extracted by the S decoder 203. When the data broadcast contents are separated and extracted by the TS decoder 203, the data broadcast contents storage unit 23
0 is stored. Data broadcast content interpreter 240
Are ROM 205 and RAM 20 as hardware.
6, the CPU 207 and the like. The data broadcast content interpreting unit 240 performs control such as reception, interpretation, and presentation of data broadcast content in terms of functions, that is, a so-called browser that operates based on an operating system and includes a script processing system. An event processing unit 241, an initial presentation unit 242, a script execution unit 243, and an interpretation target pointer 244. The event processing unit 241, the initial presentation unit 242, and the script execution unit 243 are functional units realized by the CPU 207 executing a control program stored in the ROM 205.

The interpretation target pointer 244 is a memory area for storing address information of a control document to be interpreted by the data broadcasting content interpretation unit 240 among the data broadcasting contents stored in the data broadcasting content storage unit 230. . Event processing unit 241, initial presentation unit 24
2 and the script execution unit 243
4, the processing is performed based on the control document to be interpreted.
In other words, it can be said that the data broadcast content processing mechanism 220 performs control related to the user interface based on a control document that mainly specifies control contents related to the user interface.

The event processing unit 241 stores the event type and the function in association with each other based on the event type indicated by the <event> tag in the control document to be interpreted and the description of the function to be activated when the event occurs. Has a function of controlling each unit so that the function can be activated when an event occurs. For example, if the event type is “EventMes
"sageFired", the message_
Using the message ID indicated by the description of the id, the TS decoder 20 interrupts the CPU 207 when the message of the message ID is received and separated and extracted.
3 when the interrupt occurs.
Is set so that execution of the function can be started by the script execution unit 243, and when an event actually occurs, that is, when the message is received and separated and extracted, the script execution unit 243 executes the function.
Note that the event processing unit 241 also performs control to execute a function indicated in the control document according to an operation performed by a viewer through a so-called remote controller or the like.

The initial presentation unit 242 determines whether the initial state specified by the description of initial_state is visible or invisible, based on information on the display contents of characters, graphics, and the like indicated by the <body> tag in the control document to be interpreted. The display processing circuit 208 displays the display content according to the attribute.
It has a function to tell to. As a result, display contents such as characters and figures specified based on the description in the control document are transmitted to the display processing circuit 208, and the display contents are displayed in a two-dimensional coordinate space so that the display processing circuit 208 can display the contents on the screen. Are given, and are developed in the frame memory 250.

The script execution unit 243 is, for example, an interpreter, and executes <script in the control document to be interpreted.
The description of the function indicated by the tag, ie, one or more instruction strings,
Has the ability to interpret and execute. For example, "Launch
When the command “Doc” is interpreted, the address information of the control document of the data broadcast content indicated by the parameter of the command such as “C02” is interpreted as the pointer to be interpreted 244.
To set the interpretation target. If the data broadcast content is not already stored in the data broadcast content storage unit 230, the data broadcast content is received by the TS decoder 203 by specifying a PID or the like based on the parameter “C02” or the like. Filter conditions and the like for separation and extraction are set, and when the data broadcast content is received and stored in the data broadcast content storage unit 230 by the TS decoder 203, the interpretation target is changed immediately.

For example, “SetVisibilit”
y ("Visible") "
An instruction is given to the display processing circuit 208 so that the image in the data broadcast content currently developed by the display processing circuit 208 is made visible. In addition, "S
etVisibility ("InVisible
When interpreting the instruction e ”)”, an instruction is given to the display processing circuit 208 to make the image in the data broadcast content currently developed by the display processing circuit 208 invisible.

When the visible state is instructed, the display processing circuit 208 outputs a signal based on the data broadcast content currently loaded in the frame memory 250, and when the invisible state is instructed, the display processing circuit 208 The output of the signal based on the data broadcast content is suppressed. << Operation of Receiving Apparatus >> Receiving Apparatus 200 Having the Above Configuration
CPU 207 controls the tuner 201, the demodulation circuit 202, and the TS decoder 203 using an electronic program guide (EPG) or the like in response to an operation of a viewer.
The video / audio and the data broadcast content that constitute the program that the viewer wants to view are received and separated and extracted.
Decompression processing is performed by the decoder 204, and data broadcasting contents are processed by the data broadcasting contents processing mechanism 220.
And synthesizes and outputs the video and audio stream data and the image and sound in the data broadcast content.

Hereinafter, the data broadcast content processing mechanism 22
0 about the interpretation processing of data broadcasting contents
1 will be described. FIG. 11 is a flowchart showing a data broadcast content interpretation process by the data broadcast content processing mechanism 220. First, the data broadcast content interpreting unit 240 focuses on the control document of the data broadcast content to be interpreted (step S21). That is, the control document of the data broadcast content indicated by the interpretation target pointer 244 is accessed. At first, the data broadcast content desired by the viewer is separated and extracted by the TS decoder 203 and stored in the data broadcast content storage unit 230 by referring to the EPG according to the operation of the viewer. Is set to the interpretation target pointer 244.

The event processing unit 241 of the data broadcast content interpreting unit 240 refers to the description indicated by the <event> tag of the control document in the data broadcast content to be interpreted, and associates the event type with the function. A process for storing and registering in advance so that the function is executed when an event occurs is performed. Event type is "EventM
If it is "messageFired", the script indicated by the description of onOccur, that is, the function is registered, and m
The TS decoder 203 is set to interrupt the CPU 207 when the message of the message ID indicated by the description of the message_id is received and separated and extracted (step S22). If an event type and a function are specified in the description indicated by the <event> tag, the event processing unit 241 sets the function to be executed when an event of the event type occurs. Keep it.

After the setting related to the event is performed, the initial presentation unit 242 refers to the description indicated by the <body> tag of the control document in the data broadcast content to be interpreted and focuses on the data such as characters and figures. The display content of the broadcast content is set to initial_state.
The display processing circuit 208 is controlled so as to display according to the attribute of whether the initial state specified in the description is visible or invisible (step S23).

Subsequently, the event processing section 241 determines in step S22 whether or not an event for which a function is registered has occurred. The script execution unit 243 is instructed to execute the registered function, and in response thereto, the script execution unit 243 interprets and executes the instruction sequence of the function (step S25). The occurrence of an event is detected by, for example, an interrupt to the CPU 207.

If no event has occurred in step S24 or after execution of step S25, the data broadcast content processing mechanism 220 determines whether or not the control document to be interpreted has been changed (step S26), and the data document has been changed. If so, the process proceeds to step S21, and if not changed, the event processing unit 241 performs step S24.
Is determined.

Hereinafter, a specific operation of receiving apparatus 200 when receiving data broadcast content broadcast based on the schedule illustrated in FIG. 3 will be described, focusing on data broadcast content processing mechanism 220. FIG.
FIG. 4 is a diagram illustrating an operation of the receiving apparatus 200 when receiving video / audio and data broadcast content broadcast based on the schedule illustrated in FIG. 3, mainly focusing on presentation of data broadcast content.

Here, the receiving apparatus 200 receives the data broadcast content C01 and stores it in the data broadcast content storage unit 230. The description is made on the assumption that the information is shown. First, the data broadcast content interpreting unit 240 of the data broadcast content processing mechanism 220 focuses on the control document 301 of the data broadcast content C01 (step S3).
1) When the event processing unit 241 generates a message event indicating that a message with a message ID of 01 is received, the function func1 is executed so that the TS
The decoder 203 and an interrupt processing mechanism in the operating system are set (step S32).

Subsequently, the data broadcasting content interpreting section 24
0 is the data broadcast content C by the initial presentation unit 242.
01 is presented (step S33). At this time, the initial presentation unit 242 instructs the display processing circuit 208 to display characters, graphics, and the like in a visible state based on the description indicated by the <body> tag of the control document. This allows the characters,
The graphics and the like are developed in the frame memory 250 so as to be positioned in one or a plurality of image planes in a visible state, and finally the AV decoder 204 based on the video stream data.
Are combined with the image plane composed of the video output from, and displayed on the screen.

While presenting the data broadcast content C01, the broadcast station 90 sends the data broadcast content C02.
Is started (see FIG. 4), and a message with a message ID of 01 is broadcast at the start of the broadcast (see FIG. 5). C by interrupt
The PU 207 is notified (step S34), and as a result, the event processing unit 241 causes the script execution unit 243 to execute the function func1.

Therefore, the script execution unit 243 sets the function fu
"LaunchDoc (" C02 ")" in nc1 is executed (step S35). That is, the script execution unit 2
43 is the data broadcast content C currently being interpreted
01 is excluded from the interpretation target and the data broadcast content C0
2 is set as a filter target in the TS decoder 203 to start reception and separation / extraction, and when the separated / extracted data broadcast content C02 is stored in the data broadcast content storage unit 230, the interpretation target pointer The address information of the control document 302 (see FIG. 7) of the data broadcast content C02 is set in 244, and the control document 302 is set as an interpretation target. When the script execution unit 243 removes the data broadcast content from the interpretation target, the script execution unit 243 issues a display stop instruction to the display processing circuit 208.
Clear the display contents expanded to

On the basis of the control document 302 to be interpreted, the event processing unit 241 causes the TS decoder 203 to execute the function func2 so that the function func2 is executed when a message event indicating that a message with a message ID of 02 is received occurs. Set the processing mechanism etc. (Step S3
6). Subsequently, the initial presentation unit 242 performs a process related to the presentation of the data broadcast content C02 (Step S3).
7). At this time, the initial presentation unit 242 transmits the <bo> of the control document.
The display processing circuit 208 is instructed to display an image including a “purchase” button or the like in an invisible state based on the description indicated by the dy> tag. Thus, the image including the “buy” button and the like is expanded in the frame memory 250 so as to be positioned in an invisible state on one or a plurality of image planes. The invisible state corresponds to colorless and transparent if temporarily represented by a color attribute, and as a result, the display processing circuit 208 does not output an image signal that makes the image visible to the viewer. You cannot see the contents of C02.

While displaying the data broadcast content C02 in an invisible state, the broadcast station 90 sends a message ID.
Is broadcasted (see FIG. 5), the TS decoder 203 of the receiving device 200
Received a message of 02 and interrupted by the CPU 20
7 (step S38), and as a result, the event processing unit 241 instructs the script execution unit 243 to execute the function fun.
Execute c2.

Therefore, the script execution unit 243 sets the function fu
"SetVisibility (" Visi
ble ")" (step S39). That is, the script execution unit 243 instructs the display processing circuit 208 to make the data broadcast content C02 displayed in an invisible state visible. As a result, the image composed of the "purchase" button and the like is displayed in the original color so that the viewer can recognize it. The processing executed by the display processing circuit 208 when switching between invisible and visible attributes includes processing required for calculating two-dimensional coordinates of an image such as a character or a figure to be displayed, for example, data of a character or a figure or the like. Does not include the access processing.

FIG. 13 is a diagram showing transition of a screen displayed on a display device connected to receiving device 200 as a result of the operation shown in FIG. The screen 271 is a state of the screen at a certain moment during a period from when the step S33 is executed to when the data broadcast content C01 is excluded from the interpretation target in the step S35. The image 272 of characters, graphics, and the like indicating commentary information related to news in the data broadcast content C01 is displayed in front of the video.

The screen 273 is displayed after the data broadcast content C01 is excluded from the interpretation target in step S35 and the data broadcast content C02 is determined as the interpretation target in step S35.
This is the state of the screen at a certain moment during the period before the execution of step 39, in which a news video relating to migratory birds is being played by the video / audio AV01, and the data broadcast content is not displayed on the screen.

The screen 274 is a state of the screen at a certain moment after the execution of the step S39, in which a commercial image of a PC as a product is played by the video / audio AV02 as a CM, and the data broadcast content C02 is displayed in front of the screen. "Purchase" to enable viewers to purchase products
An image 275 including buttons and the like is displayed. If the viewer selects the “Purchase” button through a remote controller or the like while this screen is displayed, the receiving device 20
0 performs an operation such as sending data indicating the purchase to the broadcast station 90 or another device through a telephone line or the like connected in advance.

<< Transmission / Reception Sequence >> Hereinafter, the above will be summarized and the temporal relationship between the operation of the transmitting apparatus 100 and the operation of the receiving apparatus 200 will be described. FIG. 14 shows the transmission device 1
00 broadcast contents, operation of receiving apparatus 200 and receiving apparatus 20
It is a figure which shows the time change with the state of the screen displayed by 0.

It is assumed that a broadcast is performed based on the schedule information 150 illustrated in FIG. In addition,
The schedule information 150 is a schedule that is scheduled to start presenting the data broadcast content C02 when the video and audio to be received and presented are switched from the video and audio AV01 to the video and audio AV02 on the receiving device side.

As for the video / audio broadcasting, the transmitting device 10
0 is the data broadcast content C0 until 7: 13: 0
Broadcasts audio-visual AV01 related to 1;
At the second, the video and audio are switched, and the video and audio AV02 related to the data broadcast content C02 is broadcast. Also,
Regarding the broadcasting of the data broadcasting content, the transmitting device 10
0 repeats the data broadcast content C01 until 7:12:45, which is slightly before 7: 13: 0,
At 7:12:45, the data broadcast content C02
Is repeated and the broadcast of the data broadcast content C01 ends at 7: 13: 0, and only the data broadcast content C02 is repeatedly broadcast.

Further, with respect to the broadcast of the message, the transmitting apparatus 100 broadcasts the message with the message ID 01 at 7:12:45, which is the time when the broadcasting of the data broadcast content C02 is started, and at 7:13. At 0 seconds, a message with a message ID of 02 is broadcast. Before 7:12:45, the receiving apparatus superimposes the video / audio AV01 and the data broadcast content C01 and displays them so that they can be seen by the viewer.

Based on the description of the function drive designation by the occurrence of an event, such as the description indicated by the <event> tag in the control document of the data broadcast content C01, the receiving apparatus receives the message with the message ID 01 as an opportunity. The reception of the next data broadcast content C02 is started, and when the reception is completed, the data broadcast content C02 is received.
02 to start interpretation of the original data broadcast content C0
No. 1 presents the data broadcast content C02 in an invisible state, so that the data broadcast content C02 is not interpreted and not presented. Therefore, only the video / audio AV01 is displayed so as to be seen by the viewer.

On the basis of the description of the function drive designation by the occurrence of an event in the control document of the data broadcast content C02, the receiving apparatus changes the presentation state of the data broadcast content to the visible state upon receiving the message with the message ID of 02. Change to Because the message has a small data volume and can be received basically in a very short time when it is broadcast, and because the display processing circuit can change the invisible data broadcast content to the visible state in a very short time. Immediately after the message with the message ID 02 is broadcast, that is, at 7: 13: 0, the video / audio AV02 and the data broadcast content C02 are superimposed and displayed so as to be seen by the viewer. .

That is, according to the transmission and reception procedures described above, the data broadcast content corresponding to the next program is displayed so as to be seen by the viewer, precisely in accordance with the timing at which the video / audio program is switched to the next program. It becomes possible. << Embodiment 2 >> Hereinafter, a data broadcast transmission / reception system according to Embodiment 2 of the present invention will be described. Embodiment 2
Is basically the same as the data broadcast transmission / reception system according to Embodiment 1 described above, except that the content of the control document of the data broadcast content transmitted by the transmission device is different. The operation of the receiving device is different.

Here, among the components of the transmitting device and the receiving device, those that are basically the same as those in the first embodiment will be described using the reference numerals shown in the first embodiment. << Control Document in Data Broadcast Content >> FIG.
FIG. 13 is a diagram illustrating an example of the content of a control document 1301 of the data broadcast content C01 transmitted to the transmission device 100 according to the second embodiment instead of the control document 301 of the data broadcast content C01 illustrated in the first embodiment.

In the control document 1301, "LockCont"
“entOnMemory” is a command description for receiving the data broadcast content designated as a parameter, separating and extracting the data broadcast content, and storing the extracted data broadcast content in the data broadcast content storage unit 230. Therefore, "LockContentOnMemory"
y ("C02") "is the data broadcast content storage unit 23 which receives and separately extracts the data broadcast content C02.
0 is stored.

[0087] The "func3" is the LockCon.
The function name of the function having the tentOnMemory instruction is the function name, and “func4” is the function name of the function having the LaunchDoc instruction. “<Item type =” EventMessage in control document 1301
eFired ”message_id =“ 01 ”o
nOccur = "func3 ()">>"indicates that an instruction constituting a function having a function name of func3 is executed when an event having the content of receiving the message whose message ID is 01 occurs.

In the control document 1301, "<item
type = “ContentLocked” con
tent_id = "C02" onOccur = "fu"
nc4 () ">>" indicates the data broadcast content C02.
When an event indicating that the storage of the data broadcast in the data broadcast content storage unit 230 has been completed occurs, the func4
Indicates that an instruction constituting a function having a function name of "" is executed.

Note that among the descriptions in the control document 1301, the same descriptions as those in the control document 301 of the first embodiment are described below.
The meaning is the same as that described in the first embodiment. << Receiving Apparatus >> The interpretation processing of the data broadcasting content by the data broadcasting content processing mechanism 220 of the receiving apparatus 200 is as shown in FIG.

However, the event processing unit 241 of the data broadcasting content interpreting unit 240 of the receiving device 200 refers to the description indicated by the <event> tag in the control document and, for example, if the event type is “ContentLocked”, When the data broadcast content specified by the description of the content_id is stored in the data broadcast content storage unit 230 by the TS decoder 203, more specifically, when the storage is completed, the function specified by the description of onOccur is executed by the script execution unit 243. Have the function of executing

When interpreting, for example, the command “LockContentOnMemory”, the script execution unit 243 interprets the parameter “C0
TS decoder 203 by specifying PID or the like based on
Has a function of setting a filter condition and the like for receiving and separately extracting the data broadcast content specified by the parameter.

FIG. 16 shows a receiving apparatus 2 according to the second embodiment in the case where the video / audio and the data broadcasting content broadcast based on the schedule illustrated in FIG. 3 are received.
FIG. 11 is a diagram showing the operation of the P.00 mainly focusing on the presentation of the data broadcast content. Here, the receiving device 200
Receives the data broadcast content C01 and stores it in the data broadcast content storage unit 230. The interpretation target pointer 244 indicates the control document 1 of the data broadcast content C01.
Description will be made assuming that address information 301 (see FIG. 15) is shown.

First, the data broadcast content processing mechanism 22
The data broadcast content interpreting unit 240 of 0 pays attention to the control document 1301 of the data broadcast content C01 (step S1031). The TS decoder 203, the interrupt processing mechanism in the operating system, and the like are set so as to be executed.
Necessary information is set so that the function func4 is executed when the storage into 0 is completed (step S103).
2).

Subsequently, the data broadcasting content interpreting section 24
0 is the data broadcast content C by the initial presentation unit 242.
01 is presented (step S1033). At this time, the initial presentation unit 242 instructs the display processing circuit 208 to display characters, graphics, and the like in a visible state based on the description indicated by the <body> tag of the control document. As a result, the characters, graphics, and the like are developed in the frame memory 250 so as to be positioned in one or a plurality of image planes in a visible state.
The image is combined with the image plane composed of the video output from the image display unit 04 and displayed on the screen.

While presenting the data broadcast content C01, the broadcast station 90 transmits the data broadcast content C02.
Is started (see FIG. 4), and a message with a message ID of 01 is broadcast at the start of the broadcast (see FIG. 5). C by interrupt
The PU 207 is notified (step S1034), and as a result, the event processing unit 241 causes the script execution unit 243
Execute the function func3.

Therefore, the script execution unit 243 sets the function fu
"LockContentOnMemory" in nc3
(“C02”) ”(step S1035).
That is, the script execution unit 243 starts reception and separation / extraction by setting a filter condition in the TS decoder 203 to obtain the data broadcast content C02.
However, even after execution of step S1035, the control document of the data broadcast content C01 remains to be interpreted, and the data broadcast content C01 is presented on the screen.

When the reception and the separation and extraction of the data broadcast content C02 are completed, when the data broadcast content C02 is stored in the data broadcast content storage section 230, the event processing section 241 starts to execute the script execution section 243.
The function func4 is executed. Accordingly, the script execution unit 243 sets “LaunchD” in the function “func4”.
oc ("C02") ", that is, the pointer to be interpreted 2
44 shows the control document 30 of the data broadcast content C02.
2 (see FIG. 7) is set, and the control document 302 is interpreted (step S1036).

On the basis of the control document 302 to be interpreted, the event processing unit 241 causes the TS decoder 203 and the interruption Set the processing mechanism etc. (Step S10
37). Subsequently, the initial presentation unit 242 performs a process related to the presentation of the data broadcast content C02 (Step S1).
038). At this time, the initial presentation unit 242 transmits the <
The display processing circuit 208 is instructed to display an image including a “purchase” button or the like in an invisible state based on the description indicated by the body> tag. Thus, the image including the “buy” button and the like is expanded in the frame memory 250 so as to be positioned in an invisible state on one or a plurality of image planes. However, the viewer cannot see the contents of the data broadcast content C02 in the invisible state.

While displaying the data broadcast content C02 in an invisible state, the broadcast station 90 sends a message ID.
Is broadcasted (see FIG. 5), the TS decoder 203 of the receiving device 200
Received a message of 02 and interrupted by the CPU 20
7 (step S1039), and as a result, the event processing unit 241 causes the script execution unit 243 to send the function f
unc2 is executed.

Therefore, the script execution unit 243 sets the function fu
"SetVisibility (" Visi
ble ")" (step S1040). That is, the script execution unit 243 instructs the display processing circuit 208 to make the data broadcast content C02 displayed in an invisible state visible. As a result, the image composed of the "purchase" button and the like is displayed in the original color so that the viewer can recognize it.

<< Transmission / Reception Sequence >> FIG. 17 shows the broadcast contents of the transmitting apparatus 100, the operation of the receiving apparatus 200, and the receiving apparatus 2.
It is a figure which shows the time change with the state of the screen displayed by 00. The difference from the event shown in FIG. 14 in the first embodiment is that the data broadcast content C01 is displayed in a visible state overlapping with the video / audio AV01 until the reception of the data broadcast content C02 is completed. .
Therefore, in the second embodiment, the time during which there is no visible data broadcast content is shorter than that in the first embodiment by the time required for receiving the data broadcast content C02. << Supplement >> As described above, the data broadcast transmission / reception system according to the present invention has been described based on the first and second embodiments. However, it is needless to say that the present invention is not limited to these embodiments.
(1) In both embodiments, the example in which the schedule information 150 (see FIG. 3) indicates the start time of a plurality of programs to be broadcasted in the future has been described. May be dynamically determined by a program creator or the like, and the dynamically determined schedule information may be input to the schedule information storage unit 101 of the transmission device 100. Accordingly, it is possible to cope with a case where the program switching timing is determined immediately before, such as a case where the program maker designates the timing of switching to the CM immediately before the broadcasting of a so-called live program. (2) In the first embodiment, the control document 301 (see FIG. 6)
In the above example, only the LaunchDoc instruction is included in the function func1.
"SetVisibility (" InVi) "for making the data broadcast content C01 invisible before the command.
Sible ")" may be added. FIG. 18 shows a control document 23 having such a description.
01 is shown. Control document 2 instead of control document 301
When the message 301 is broadcast, the receiving apparatus 200 receives the message with the message ID of 01, and the function func
1; that is, the reception of the data broadcast content C02 after the data broadcast content C01 is made invisible,
The interpretation will begin. In this way, even when the data broadcast content C02 cannot be received due to a broadcast accident or the like, the data broadcast content C01 is continuously displayed in a visible state endlessly, so that the video / audio AV02 can be continuously displayed.
It is possible to prevent the occurrence of a mismatched state of the program such that the program is superimposed.

Similarly, control document 1 shown in the second embodiment
LockCo of function func3 of 301 (see FIG. 15)
"SetVis" before the nentOnMemory instruction.
ibility ("InVisible") ". (3) In both embodiments, the data broadcast content interpreting section 240 performs processing related to presentation of data broadcast content (step S22) after storing a function to be executed when an event occurs, that is, registering an event (step S22). S23), but this order may be reversed.
Note that even after registration of an event, for an event generated based on an operation of a viewer, a function associated with the event is not until after the data broadcast content is displayed in a visible state. May not be performed. (4) In both embodiments, the display processing circuit 208 displays the display content in the data broadcast content based on a certain control document.
Although it is determined that the image data is expanded so as to be positioned in one or more image planes of the frame memory 250 in the middle, an area including one or more image planes for expanding the display contents based on a certain control document is stored in the frame memory 250.
May be two sets.

FIG. 19 is a functional block diagram of a modification of the display processing circuit 208 in which the frame memory has two sets of image plane areas. The frame memory has two sets of image plane areas corresponding to the same screen coordinate space, that is, a first plane area 251 and a second plane area 252. The modified display processing circuit 208 has a memory for storing display target plane designation information 255 for designating any one of the image plane regions.
And outputs an image signal based only on the image plane area specified by.

A modified display processing circuit 208 shown in FIG.
When an instruction is given to display the data broadcast content in a visible or invisible state, a figure or the like, which is the display content of the data broadcast content, is displayed in the image plane area not specified by the display target plane designation information 255. Is displayed as an image, and the display target plane designation information 255 is instructed to be displayed in an invisible state.
Does not update, and has a function of updating the display target plane specification information 255 so as to specify an image plane area in which the figure or the like is developed if the display is instructed to be displayed in a visible state. Further, when an instruction to switch from the invisible state to the visible state is issued, the display target plane specification information 255 is updated so as to specify an image plane area opposite to the current one, and the output image plane area is switched. Shall be provided.

When using the modified display processing circuit 208, the script execution unit 243
In response to the oc command, there is no need to issue a display stop instruction to the display processing circuit 208 when the data broadcast content that has been interpreted up to now is excluded from interpretation. According to this, for example, at the moment when the data broadcast content C02 is switched to the visible state and displayed so that the viewer can see it, the data broadcast content C01 can be set to the invisible state, and the data broadcast content can be switched with high accuracy. It can be displayed. That is, the data broadcast content corresponding to the original program is not shown to the viewer, and the data broadcast content corresponding to the next program is displayed to the viewer precisely in accordance with the timing at which the video / audio program switches to the next program. It is possible to show to. (5) One unit of data broadcast content shown as corresponding to one program in both embodiments includes at least one control document, and includes material data whose presentation format is specified by the control document. Any number may be provided, and a plurality of units of data broadcasting content may be broadcast at the same time.

The data broadcast content may be composed of a plurality of material data such as characters and figures and a plurality of control documents. Here, each of the plurality of control documents basically specifies a display format of material data for forming one screen, and the screens are linked to each other. The plurality of material data and the plurality of control documents may be divided into a plurality of groups, and the material data and the control documents belonging to the same group may be regarded as one module, and the data broadcast content may be constituted by a plurality of modules.

As a presentation schedule of a program, when it is desired to display data broadcast content by a control document of a certain module A at a certain time t, the transmission apparatus side transmits the data broadcast content to a module group of the already broadcast data broadcast content. In addition, shortly before the time t arrives, the module A
And the message with the message ID 01 is broadcast, and when the time t arrives, the message ID becomes 0.
The second message may be broadcast. However, in the control document of the data broadcast content that has been broadcasted earlier, the module A is received and stored in the memory upon reception of the message with the message ID of 01, and the control document of the module A is interpreted as the data. An <event> tag and an <scri> tag for instructing that the display content of the broadcast content be expanded in a frame memory in an invisible state
pt> tag and the like, and in the control document of the module A, the display content developed in the frame memory is changed to a visible state upon receiving the message with the message ID of 02. It is assumed that a description corresponding to an <event> tag, a <script> tag, or the like for instructing that the information is to be included. Note that the receiving device may be configured to perform an operation corresponding to the description in the control document. (6) In both embodiments, the case where the data broadcast content to be displayed is switched in synchronization with the timing of switching between the video and audio programs has been described as an example (see FIG. 3). It is not necessary to change the data broadcast content displayed on the receiving device side at a timing determined by the broadcast program creator or the like in relation to the progress of the program during the video / audio program.

It is generally assumed that the timing at which the display of the data broadcast content should be switched, more specifically, the timing at which the next data broadcast content should be displayed so as to be viewed by the viewer, is determined in relation to video and audio. However, it need not be determined in relation to video and audio. It is generally assumed that the video / audio and the data broadcast content presented at the same time are related in content, but may be unrelated to each other in content.

When broadcasting data broadcasting contents, it is not necessary to multiplex video and audio, and broadcasting may be performed together with data broadcasting contents. Neither the sound nor the sound may be broadcast. In other words, the data broadcasting transmission / reception system allows the transmitting device to broadcast a message at a specific timing so as to meet the intention of the creator or the like who determines the temporal programming of the data broadcasting content, so that the data broadcasting is performed by the receiving device. What is necessary is just to control the timing to start displaying the content so that the content can be seen by the viewer.

Furthermore, the data broadcast content C01
Is switched to the data broadcast content C02, and the time immediately before the time t0 to be presented can be specified in advance, the transmitting apparatus does not broadcast the message with the message ID 01 shortly before the time t0, and the data broadcast is omitted. The content C01 may be broadcast including the control document 3301 shown in FIG. It should be noted that “<item type =” in the control document 3301
TimerFired "timevalue =" 0
7:12:45 "onOccur =" func
1 () ">>" indicates that an instruction constituting a function having a function name of func1 is executed when a timer event indicating that 7:12:45 has arrived. However,
It is necessary to configure the receiving device to execute the function in response to the occurrence of the timer event.

Similarly, when the time t0 can be designated in advance, the data broadcast content C02 uses a timer event triggered by the arrival of the time t0 instead of the message event triggered by the reception of the message with the message ID of 02. May be rewritten. Assuming that the receiving apparatus has a mechanism for detecting that the designated data broadcast content has started broadcasting, the broadcast of the message having the message ID 01 is omitted, and the data broadcast content C01 is omitted.
In the control document 301 or the like, the description that the function is to be executed when the message with the message ID 01 is received is executed, and the function is executed when the start of the broadcast of the data broadcast content C02 is detected. It may be rewritten as a statement to the effect. (7) In both embodiments, the transmitting device side has different message IDs a little before the time t0 and a time t0 when the user wants to display a certain unit of data broadcasting content so that the viewer can see it. Is broadcast, but the broadcast of a message including a certain message ID is not limited to one time, and may be continuously broadcasted a plurality of times. However, in this case, even if a message having the same message ID is successively sent, the receiving apparatus treats the message event as having occurred once, and stores the message only once in association with the event. Function must be executed. (8) In both embodiments, the time is shown in hours, minutes, and seconds in the example of the content of the schedule information (FIGS. 3 to 5). However, the expression format of the time is arbitrary, and the time can be expressed by adding the date. Often,
Also, the time unit may be expressed to a time unit smaller than the second.

The description of tags, instructions, and the like shown as examples of the contents of the control document is merely an example, and other descriptions may be used as long as they represent the same contents. Further, the values of the message ID, the video / audio management code, the data broadcast content management code, and the like shown in both embodiments are merely examples. In the embodiment, the example in which the data broadcast content management code is described in the parameter of each command in the control document has been described. However, the parameter of each command includes the data broadcast content, one module thereof, or the control module. Any identification information that can specify a document may be described. However, it is necessary for the receiving device to be able to control the reception, interpretation and presentation of the data broadcast content based on the described identification information. (9) In both embodiments, the data broadcasting transmission / reception system is a system for transmitting and receiving satellite digital broadcasting. However, the present invention is not limited to satellite broadcasting or digital broadcasting. In the case of broadcasting on a TV, or in the case of data broadcasting contents, VBI (Vertical Blanking Int) in analog broadcasting
(Eval.) can also be applied. (10) In both embodiments, at the scheduled presentation start time of a certain unit of data broadcasting content, that is, at the time when the data broadcasting content is to be displayed so as to be viewed by a viewer, the transmitting apparatus transmits the message with the message ID 02 The message is scheduled to start presenting the data broadcast content in consideration of the time required for the receiving device to change the data broadcast content presented in the invisible state from the reception of the message to the visible state. It may be broadcast earlier by that time. (11) In both embodiments, the description has been made focusing on the aspect of accurately controlling the presentation timing of images such as characters and graphics in data broadcasting contents. However, similarly, sound effects and other sounds in data broadcasting contents are similarly described. Can be accurately controlled. That is, when the receiving device receives the message with the message ID of 01, the data for audio reproduction in the data broadcast content is immediately reproduced by, for example, decompression or format conversion. The control document in the data broadcast content can be described so that the reproduction is started when the message is received.

[0113]

As is apparent from the above description, the data broadcast transmission / reception system according to the present invention comprises a transmitting device for transmitting data broadcast contents and a receiving device for receiving and presenting the transmitted data broadcast contents. In the data broadcast transmission / reception system, the transmission device is configured to obtain a scheduled presentation time at which the data broadcast content is to be presented, and to start transmitting the data broadcast content before the scheduled presentation time arrives. Data broadcasting content transmitting means, and a message transmitting means for transmitting a presentation start instruction message when the scheduled presentation time has arrived, wherein the receiving device receives the transmitted data broadcasting content and transmits the data broadcasting content. Data broadcast content reception / presentation means for presenting in an invisible state, and a transmitted presentation start instruction Upon receiving the message, characterized in that it comprises a data broadcast content visualizing unit that the data broadcast content that is invisible to visible.

As a result, since the processing related to the presentation of the data broadcast content is performed to some extent in the receiving apparatus before the scheduled presentation time, the data broadcast content is immediately visible to the viewer at the scheduled presentation time.
Therefore, the program creator or the like can specify the time at which the data broadcasting content is presented in the receiving device with high accuracy by giving the scheduled presentation time to the transmitting device.

The message transmitting means transmits an invisible presentation instruction message when the data broadcasting content transmitting means starts transmitting data broadcasting content,
The data broadcast content reception / presentation means may start receiving the transmitted data broadcast content when receiving the transmitted invisible presentation instruction message, and present the data broadcast content in an invisible state when the reception is completed. .

As a result, the transmitting apparatus can inform the receiving apparatus when reception should be started in order to make preparations for presenting the data broadcast content so that the viewer can see it. Further, the data broadcasting content transmitting means starts transmitting the preceding data broadcasting content prior to the data broadcasting content, and the preceding data broadcasting content is triggered by receiving an invisible presentation instruction message to a receiving device. The first data broadcast content includes first control information including an instruction to start receiving the data broadcast content and the data broadcast content should be presented, and the data broadcast content includes image forming information for forming an image to be displayed. The receiving device is invisible when receiving an instruction to form an image based on the image forming information and keep it invisible when receiving a presentation target, and receiving a presentation start instruction message. And second control information including an instruction to make the image visible. The presenting unit receives the preceding data broadcast content, waits for reception of an invisible presentation instruction message based on the first control information, and starts receiving the transmitted data broadcast content when the invisible presentation instruction message is received. When the reception of the data broadcast content is completed, the data broadcast content is set as a target to be presented, an image is formed based on the second control information of the data broadcast content set as the target to be rendered invisible, and a presentation start instruction message Waiting for reception, the data broadcast content visualization means may make the invisible image visible when the presentation start instruction message is received.

[0117] Thus, the script processing system can be instructed by the transmitting device to present the data broadcast content to the receiving device in an invisible state first, and then to change the invisible state to the visible state when a message is received. Controlling a receiving device having a so-called browser including
Following the preceding data broadcast content, the data broadcast content can be presented to the viewer immediately at the scheduled presentation time.

The data broadcast content reception / presentation means performs the presentation of the data broadcast content in an invisible state until the image is stored in a frame memory based on the image formation information. Output of the data broadcast content to a display device connected to a receiving device, and the data broadcast content visualization means causes the data broadcast content to be in a visible state by displaying an image in the frame memory. May be realized by outputting a signal based on the information to a display device connected to the receiving device.

As a result, the time required to change the state from the invisible state to the visible state can be made very short, and the data broadcast content is immediately sent to the viewer when the scheduled presentation time comes. You will be able to present it so that you can see it. Further, the preceding data broadcast content further includes preceding image formation information for forming an image to be displayed, and the instruction in the first control information is set to be currently visible when an invisible presentation instruction message is received. An instruction to start receiving the data broadcast content after the image being displayed in the invisible state has been started and to present the data broadcast content as an object to be presented. After receiving the image based on the preceding image forming information is displayed in a visible state,
When the invisible presentation instruction message is received, the image displayed on the basis of the preceding image formation information may be made invisible before receiving the data broadcast content.

Thus, even when the receiving device cannot receive the data broadcasting content that should be transmitted from the transmitting device following the preceding data broadcasting content due to a broadcast accident or the like, the image in the preceding data broadcasting content can be seen by the viewer. Can be prevented from remaining as displayed. The preceding data broadcast content further includes preceding image formation information for forming an image to be displayed, and the data broadcast content reception / presentation means can store both the data broadcast content and the preceding data broadcast content. Having a memory, displaying the image based on the preceding image formation information in a visible state after receiving and storing the preceding data broadcasting content in the memory, and receiving the data broadcasting content when receiving the invisible presentation instruction message Then, the image displayed on the memory may be deleted based on the preceding image formation information when the data broadcast content is completely stored in the memory.

As a result, it is not necessary to erase the preceding data broadcast content to release the memory so that it can be used for processing the data broadcast content immediately before the data broadcast content starts to be received and stored in the memory. Since the preceding data broadcast content is deleted only after the broadcast content is stored in the memory, the preceding data broadcast content can be presented for a longer time.

Further, the data broadcast content transmitting means may further include a video constituting a first program having a content related to the preceding data broadcast content and a video constituting a second program having a content related to the data broadcast content. Continuous video stream data is multiplexed and transmitted with the preceding data broadcast content and the data broadcast content, and the scheduled presentation time is set when the video constituting the second program in the video stream data starts to be presented in the receiving device. It is predetermined so as to coincide with the scheduled time, and the data broadcasting content reception / presentation means is:
Further, the transmitted video stream data may be received to present a program constituted by the video stream data.

Thus, in the receiving apparatus, the presentation of the data broadcast content having the content related to the second program can be started in accordance with the switching timing of the first program and the second program composed of the video stream data and the like accurately. Will be able to The data broadcast content transmitting means may repeatedly transmit each of the preceding data broadcast content and the data broadcast content.

As a result, even if the receiving device cannot receive the transmitted data broadcast content for the first time, the data can be received next time. Therefore, the data broadcast content can be immediately received at the scheduled presentation time. Can be presented to the viewer. Further, the data broadcasting content reception / presentation means may start receiving the transmitted data broadcasting content when a predetermined time has come, and present the data broadcasting content in an invisible state when the reception is completed. It may be.

Thus, when the time at which the data broadcast content is transmitted can be specified in advance, the data broadcast content can be presented to the viewer immediately at the scheduled presentation time. Further, the data broadcast content reception / presentation means starts receiving the transmitted data broadcast content in response to detecting that the transmission of the data broadcast content has started, and when the reception is completed, the data broadcast content is displayed. It may be presented in an invisible state.

Thus, the receiving apparatus detects the start of the data broadcast transmission by referring to, for example, predetermined identification information extracted from the received signal, and when the transmission of the data broadcast content is started, the receiving apparatus detects the start of the data broadcast content. Since the reception can be started, the data broadcast content can be presented to the viewer immediately after the scheduled presentation time has arrived.

Further, the data broadcast transmitting / receiving method according to the present invention is directed to a data broadcast transmitting / receiving method used in a system comprising a transmitting device for transmitting data broadcast content and a receiving device for receiving and presenting the transmitted data broadcast content. A scheduled presentation time obtaining step of obtaining a scheduled presentation time at which the data broadcasting content is to be presented, and a data broadcasting content transmitting step of starting to transmit the data broadcasting content before the scheduled presentation time arrives at the transmitting device. A message transmitting step of transmitting a presentation start instruction message when the scheduled presentation time has arrived at the transmitting device; and a receiving device for receiving the transmitted data broadcast content and displaying the data broadcast content in an invisible state. Data broadcasting content reception presentation stage And flop, in the receiving apparatus, when receiving the transmitted presentation start instruction message, characterized in that it comprises a data broadcast content visualizing step of the data broadcast content that is invisible to visible.

[0128] Thus, since the processing related to the presentation of the data broadcast content is performed to some extent in the receiving device before the scheduled presentation time, the data broadcast content is immediately visible to the viewer when the scheduled presentation time arrives. Become. Further, a transmission device according to the present invention is a transmission device that transmits a data broadcast content to a reception device that receives and presents the data broadcast content, and acquires a presentation scheduled time at which the data broadcast content is to be presented. First control including an instruction to the presentation-scheduled-time acquiring means and an instruction to the receiving device to start receiving the data broadcast content and to present the data broadcast content as an object to be presented when the invisible presentation instruction message is received. Image forming information for forming an image to be displayed from the start of transmission of the preceding data broadcast content including information, from the start of the transmission of the preceding data broadcast content, and from before the scheduled presentation time, and That the image should be formed and invisible based on the image formation information when it is presented Data broadcast content transmitting means for starting to transmit data broadcast content including an instruction and second control information including an instruction to make the invisible image visible when receiving the presentation start instruction message Message transmission means for transmitting an invisible presentation instruction message when the data broadcast content transmission means starts transmitting data broadcast content, and transmitting a presentation start instruction message when the scheduled presentation time has arrived. And

Thus, when the receiving device has a so-called browser including a script processing system, the receiving device is controlled so that the data broadcast content can be presented to the viewer immediately at the scheduled presentation time. Will be able to do it.

[Brief description of the drawings]

FIG. 1 is a diagram showing a schematic configuration of a data broadcast transmission / reception system according to Embodiment 1 of the present invention.

FIG. 2 is a functional block diagram of a transmission device 100.

FIG. 3 is a diagram illustrating a configuration and an example of contents of schedule information stored in a schedule information storage unit 101;

FIG. 4 is a diagram showing a configuration and an example of contents of a data broadcast content transmission schedule determined by a scheduling unit 102.

FIG. 5 is a diagram showing a configuration and an example of contents of a message transmission schedule determined by a scheduling unit 102.

FIG. 6 is a diagram showing an example of the content of a control document in data broadcast content C01.

FIG. 7 is a diagram showing an example of the content of a control document in a data broadcast content C02 corresponding to a program following the data broadcast content C01.

FIG. 8 is a flowchart showing an operation of the transmitting apparatus 100.

FIG. 9 is a configuration diagram of a receiving device 200.

FIG. 10 is a functional block diagram illustrating a data broadcast content processing mechanism of the receiving device 200.

FIG. 11 is a flowchart showing a data broadcast content interpretation process by a data broadcast content processing mechanism 220;

12 is a diagram illustrating an operation of the receiving apparatus 200 when receiving a video / audio and a data broadcast content broadcast based on the schedule illustrated in FIG. 3, mainly focusing on the presentation of the data broadcast content. .

FIG. 13 shows the result of the operation shown in FIG.
It is a figure showing transition of the screen displayed on the display connected to 00.

FIG. 14 shows broadcast contents of transmitting apparatus 100 and receiving apparatus 200.
FIG. 7 is a diagram showing a temporal change between the operation of FIG. 1 and the state of the screen displayed by the receiving device 200.

FIG. 15 shows a data broadcast content C transmitted to transmitting apparatus 100 in the second embodiment instead of control document 301 of data broadcast content C01 shown in the first embodiment.
13 is a diagram illustrating an example of the content of a control document 1301 of FIG.

16 is a diagram illustrating an operation of receiving apparatus 200 according to Embodiment 2 when video and audio and data broadcast content broadcast based on the schedule illustrated in FIG. 3 are received, mainly focusing on the presentation of data broadcast content. FIG.

FIG. 17 shows broadcast contents of transmitting apparatus 100 and receiving apparatus 200.
FIG. 7 is a diagram showing a temporal change between the operation of FIG. 1 and the state of the screen displayed by the receiving device 200.

FIG. 18 is a diagram showing an example of the content of a control document in data broadcast content C01.

FIG. 19 is a functional block diagram of a modification of the display processing circuit 208 in which the frame memory has two sets of image plane areas.

FIG. 20 is a diagram illustrating an example of the content of a control document in data broadcast content C01.

[Explanation of symbols]

 Reference Signs List 90 broadcast station 91 relay station 100 transmitting apparatus 101 schedule information storage section 102 scheduling section 103 video / audio storage section 104 video / audio transmission section 105 data broadcast content storage section 106 data broadcast content transmission section 107 message transmission section 108 multiplexing section 109 transmission section Reference Signs List 200 receiving device 201 tuner 202 demodulation circuit 203 TS decoder 204 AV decoder 205 ROM 206 RAM 207 CPU 208 display processing circuit 209 sound processing circuit 220 data broadcast content processing mechanism 230 data broadcast content storage section 240 data broadcast content interpretation section 241 event processing section 242 Initial presentation unit 243 Script execution unit 244 Interpreted pointer 250 Frame memory

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 7/081 (72) Inventor Ryo Ishikawa 1006 Oaza Kadoma, Kadoma City, Osaka Matsushita Electric Industrial Co., Ltd. (72 ) Inventor Masaya Yamamoto 1006 Kazuma Kadoma, Kadoma-shi, Osaka Matsushita Electric Industrial Co., Ltd. F term (reference) 5C063 AB03 AB07 AB11 CA16 DA03 DA05 DA07 DA13

Claims (17)

[Claims] 1. A data broadcast transmission / reception system comprising: a transmission device that transmits data broadcast content; and a reception device that receives and presents the transmitted data broadcast content, wherein the transmission device displays the data broadcast content. Scheduled presentation time obtaining means for acquiring a scheduled presentation time to be performed; data broadcasting content transmitting means for starting to transmit data broadcasting content before the scheduled presentation time has arrived; and a presentation start instruction message when the scheduled presentation time has arrived Message receiving means for receiving the transmitted data broadcast content, and presenting the data broadcast content in an invisible state; and a transmitted presentation start instruction. When a message is received, the data broadcast content that is invisible Data broadcasting transmission and reception system comprising: a data broadcast content visualizing unit for visible state. 2. The message transmitting means transmits an invisible presentation instruction message when the data broadcasting content transmitting means starts transmitting data broadcasting content, and the data broadcasting content receiving / presenting means transmits the transmitted invisible presentation instruction. 2. The data broadcast transmission / reception system according to claim 1, wherein when the message is received, the transmitted data broadcast content starts to be received, and when the reception is completed, the data broadcast content is presented in an invisible state. 3. The data broadcasting content transmitting means,
Prior to the data broadcast content, start transmitting the preceding data broadcast content, wherein the preceding data broadcast content is
The data broadcast content includes first control information including an instruction to start receiving the data broadcast content in response to receiving the invisible presentation instruction message and to present the data broadcast content as an object to be presented. Image forming information for forming an image, an instruction to the receiving device that an image should be formed based on the image forming information when the image is to be presented, and a presentation start instruction message And the second control information including an instruction that the image in the invisible state should be made visible upon receipt of the data broadcast content, and the data broadcast content reception / presentation unit receives the preceding data broadcast content. Waiting for the reception of an invisible presentation instruction message based on the first control information. Starts receiving the data broadcast content, and when the data broadcast content is completely received, the data broadcast content is presented, and an image is formed based on the second control information of the presented data broadcast content to form an invisible image. 3. The data broadcast content visualizing means, when receiving the presentation start instruction message, renders the invisible image visible when receiving the presentation start instruction message. Data transmission and reception system according to the description. 4. The data broadcast content reception / presentation means performs the presentation of the data broadcast content in an invisible state until the image is stored in a frame memory based on the image formation information. The data broadcast content visualizing means is configured to suppress the output of a signal based on the image to a display device connected to a receiving device, and the data broadcast content visualizing unit renders the data broadcast content in a visible state by using an image in the frame memory. 4. The data broadcast transmission / reception system according to claim 3, wherein the data broadcast transmission / reception system is realized by outputting a signal based on the data to a display device connected to the reception device. 5. The preceding data broadcast content further includes preceding image formation information for forming an image to be displayed, and the instruction in the first control information is triggered by receiving an invisible presentation instruction message. An instruction that the image being displayed in the current visible state is invisible and the data broadcast content is to be received and the data broadcast content is to be presented. After receiving the data broadcast content, display the image based on the preceding image formation information in a visible state, and when receiving the invisible presentation instruction message, set the image displayed based on the preceding image formation information to the invisible state. 5. The data broadcast transmission / reception according to claim 4, wherein the data broadcast content starts to be received. Stem. 6. The preceding data broadcasting content further includes preceding image forming information for forming an image to be displayed, wherein the data broadcasting content receiving / presenting means includes a step of combining the data broadcasting content and the preceding data broadcasting content. Having a memory capable of storing, displaying the image based on the preceding image formation information in a visible state after receiving the preceding data broadcasting content and storing it in the memory, and receiving the invisible presentation instruction message, Receiving the content and starting to store it in the memory,
5. The data broadcast transmission / reception system according to claim 4, wherein when the storage of the data broadcast content in the memory is completed, the displayed image is deleted based on the preceding image formation information. 7. The data broadcasting content transmitting means,
Further, the video data comprising the video constituting the first program having the content related to the preceding data broadcasting content and the video constituting the second program having the content relating to the data broadcasting content are continuously transmitted to the preceding data broadcasting. Multiplexed with the content and the data broadcast content and transmitted, and the scheduled presentation time is the second in the video stream data.
It is predetermined so as to coincide with the time when the video constituting the program is scheduled to be presented and started at the receiving device, and the data broadcast content reception / presentation means further receives the transmitted video stream data. 4. The data broadcast transmission / reception system according to claim 3, wherein a program constituted by the video stream data is presented. 8. The data broadcasting content transmitting means,
4. The data broadcast transmission / reception system according to claim 3, wherein each of the preceding data broadcast content and the data broadcast content is repeatedly transmitted. 9. The data broadcasting content transmitting means,
Further, video stream data including a video constituting a program having a content related to the data broadcast content is multiplexed with the data broadcast content and transmitted, and the scheduled presentation time is based on the video constituting the program in the video stream data. The data broadcast content reception / presentation means receives the transmitted video stream data and further receives the transmitted video stream data, so that the data broadcast content reception / presentation unit receives the video stream data. 3. The data broadcast transmission / reception system according to claim 2, wherein the configured program is presented. 10. The data broadcast content includes image formation information for forming an image to be displayed, and the data broadcast content reception / presentation unit displays the data broadcast content in an invisible state by the image formation. The step of storing the image in the frame memory based on the information is performed, and the output of the signal based on the image in the frame memory to the display device connected to the receiving device is suppressed. 2. The device according to claim 1, wherein the means for making the data broadcast content visible is realized by outputting a signal based on an image in the frame memory to a display device connected to a receiving device. Data broadcasting transmission / reception system. 11. The data broadcast content reception / presentation means starts receiving the transmitted data broadcast content when a predetermined time has arrived, and when the reception is completed, the data broadcast content is displayed in an invisible state. The data broadcast transmission / reception system according to claim 1, wherein the data broadcast is presented. 12. The data broadcast content reception / presentation means starts receiving the transmitted data broadcast content in response to detecting that the transmission of the data broadcast content has started, and when the reception is completed, the data broadcast content receives and transmits the data broadcast content. 2. The data broadcast transmission / reception system according to claim 1, wherein the broadcast content is presented in an invisible state. 13. A data broadcast transmission / reception method used in a system including a transmitting device for transmitting data broadcast content and a receiving device for receiving and presenting the transmitted data broadcast content, wherein the data broadcast content is presented. A scheduled presentation time obtaining step of acquiring a scheduled presentation time to be sent; a data broadcasting content transmitting step of starting to transmit data broadcasting content before the arrival of the scheduled presentation time in the transmission device; and the presentation schedule in the transmission device. A message transmitting step of transmitting a presentation start instruction message when the time has arrived, and a data broadcasting content receiving and presenting step of receiving the transmitted data broadcasting content and presenting the data broadcasting content in an invisible state in the receiving device. In the receiving device, transmitting Upon receiving the presentation start instruction message, data broadcast transmission and reception method characterized by comprising a data broadcast content visualizing step of the data broadcast content that is invisible to visible. 14. A transmitting apparatus for transmitting data broadcasting content to a receiving apparatus for receiving and presenting data broadcasting content, wherein a scheduled presentation time acquiring means for acquiring a scheduled presentation time at which the data broadcasting content is to be presented. And preceding data including first control information including an instruction to start receiving the data broadcast content and to present the data broadcast content in response to the reception of the invisible presentation instruction message to the receiving device. Starting the transmission of the broadcast content, delaying from the start of the transmission of the preceding data broadcast content, and before the arrival of the scheduled presentation time, the image forming information for forming the image to be displayed, and the presentation to the receiving device. An instruction that an image should be formed based on the image forming information and kept in an invisible state when the image is targeted; Data broadcast content transmitting means for starting to transmit data broadcast content including second control information including an instruction to make an invisible image visible when the start instruction message is received, and the data A transmitting unit that transmits an invisible presentation instruction message when the broadcast content transmission unit starts transmitting data broadcast content, and transmits a presentation start instruction message when the scheduled presentation time comes. . 15. The data broadcast content transmitting means further comprises: a video constituting a first program having a content related to the preceding data broadcast content and a video constituting a second program having a content related to the data broadcast content. The continuous video stream data is multiplexed with the preceding data broadcast content and the data broadcast content and transmitted, and the scheduled presentation time is the second in the video stream data.
15. The transmission device according to claim 14, wherein the video constituting the program is predetermined so as to coincide with the time when the video is scheduled to be presented and started at the reception device. 16. The transmitting apparatus according to claim 15, wherein said data broadcast content transmitting means repeatedly transmits each of said preceding data broadcast content and said data broadcast content. 17. A control program for causing a transmission device that transmits data broadcast content to a reception device that receives and presents data broadcast content to perform a content transmission process, wherein the content transmission process includes: A scheduled presentation time acquisition step of acquiring a scheduled presentation time at which the broadcast content is to be presented, and receiving the invisible presentation instruction message to the receiving device as a trigger to start receiving the data broadcast content and to display the data broadcast content. The transmission of the preceding data broadcast content including the first control information including the instruction to indicate the presentation target is started, and the transmission of the preceding data broadcast content is delayed from the start of the preceding data broadcast content and before the scheduled presentation time arrives. Image forming information for forming an image, and An instruction to form an image based on the image forming information and keep it in an invisible state, and an instruction to make an invisible image visible when a presentation start instruction message is received. A data broadcast content transmitting step for starting to transmit data broadcast content including second control information including: and an invisible presentation instruction message when the data broadcast content starts to be transmitted by the data broadcast content transmitting step, and the presenting schedule is provided. A message transmitting step of transmitting a presentation start instruction message when the time has arrived.