JPH09298469A - Image communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a system in which a monitored image is moved as desired by the operator by providing a moving image data transmission section provided with a position control section, a compression unit and a communication control section and a monitor section provided with a position change means. SOLUTION: A moving image data transmission section 1 is provided with a video signal decoder 12 converting a signal sent from a general TV camera 11 installed toward an image pickup object into a video signal and with a compression unit 13 coding and compressing the digital signal from the video signal decoder 12, and also with a segmentation position control section 14 designating only segmentation data corresponding to an image area to e sent among the data from the decoder 12 and sending the segmentation data to the unit 13. Moreover, the moving image data transmission section 1 is provided with a communication control section 15 to conduct transmission reception of various data to/from a network 2 and a CPU 16 to control each section.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image communication system for transmitting moving images via a predetermined network.

[0002]

BACKGROUND OF THE INVENTION In general, interest in multimedia is rapidly increasing across boundaries such as computers, communications, or broadcasting. In particular, in order to accurately transmit detailed information, it is desirable to transmit a large amount of information by finally performing visual recognition. Moving image communication, for which various technologies are being developed for such purposes, generally includes moving images captured by a television camera (hereinafter abbreviated as “captured image”),
It is used for data communication of moving images such as animations through a predetermined network and monitoring at a remote location. For the purpose of, for example, broadcasting of video conferencing systems, electronic television systems, etc., or the discovery of abnormal situations in the space of the imaging target. There is a monitoring device.

[0003]

Generally, the image data has a very large amount of data to be processed. For example, when a normal NTSC television monitor is used for monitor reception, the image of a moment is 768 × 525 dots. Therefore, when transmitting such data to obtain a moving image, the data transmission speed may be increased as much as possible. However, in actuality, for example, when image data communication is performed using a public telephone line, the modem used (MODEM) has a data transfer rate (baud rate) of 28,800 even if the data transfer rate is usually high.
Since it is bps, there is a limitation in speeding up data transmission. In particular, in the case of moving image communication as described above, if the data transmission speed is slow, it becomes impossible to transfer an image compressed in real time, or image loss (dropped frames) occurs. In order to avoid these problems, conventionally, the problem has been solved by reducing the number of compressed frames of a moving image or connecting with a high-speed network with little traffic.

However, when the number of frames is reduced, the moving images are discontinuous, that is, the frames are cut off, resulting in only extremely awkward and unnatural moving images. Further, the connection is made by a high-speed network with little traffic. In order to do so, there was a problem such as an increase in equipment cost.

Therefore, an object of the present invention is to provide a high-speed and economical image communication system without reducing the number of frames and requiring a high-speed network connection with less traffic.

Further, in the case of a surveillance device or a video conference system, it may be impossible to obtain all of the expected information only with a picked-up image at a fixed position. In this case, there is a demand for moving the picked-up image vertically and horizontally. There is. In order to meet such a demand, conventionally, the neck of a television camera is rotated in an arbitrary direction such as up, down, left and right at an imaging site. In this case, since various mechanical structures for rotation, such as a drive motor and a plurality of gears for transmitting rotational power, were required, the structure becomes complicated, and it is expensive and space-efficient is not included. I was there.

Therefore, an object of the present invention is to provide an image communication system capable of moving a picked-up image to be monitored vertically and horizontally as desired by an operator without requiring a complicated mechanical structure for swinging a television camera. There is also something to offer.

[0008]

[Means for Solving the Problems] In order to solve the above problems,
The invention according to claim 1 includes a moving image data transmitting unit that processes moving image data, and a monitoring unit connected to the moving image data transmitting unit through a predetermined network, and the moving image data transmitting unit includes: A cutout position control unit that limits the position of an arbitrary cutout image region of the entire region of the moving image data, and a compression unit that compresses the moving image data corresponding to the cutout image region limited by the cutout position control unit. By including a communication control unit that sends the moving image compressed data compressed by the compression unit to the network, only a part of the cut-out image area is transmitted and the transmission speed is dramatically increased.

Further, the cutout position control section has means for changing the position of the cutout image area in the entire area of the moving image data.

According to a second aspect of the present invention, the monitoring section comprises:
A decompression processing unit for decompressing the moving image compressed data received through the network into moving image data of a predetermined format; a terminal for displaying a moving image on the screen based on the moving image data decompressed by the decompression processing unit; It is provided with an input device for designating and inputting a position of an arbitrary clipped image area to be received with respect to the clipped image displayed on the screen of the terminal.

The cutout position control unit of the moving image data transmission unit corresponds to the cutout image region designated by the input device of the monitoring unit for the position of the cutout image region in the entire region of the moving image data. It has a means to change so that

According to a third aspect of the present invention, the moving image data transmitting section sequentially scans the cut-out image area in a predetermined direction according to a predetermined discipline, and moves all of the maximum image area with a time difference. It has a control unit for controlling as described above.

According to a fourth aspect of the present invention, the moving image data transmitting section is provided with a television camera for picking up a moving image of an image pickup object, and the wide angle lens is attached to the television camera.

According to a fifth aspect of the present invention, the compression method is compression based on the information of the images before and after the compressed image, and only the difference between the image information before and after each cut-out image area and the current image information. Is transmitted, the movement of the image cutout position is controlled within the prediction range of motion compensation of the compression unit.

In a sixth aspect of the present invention, the compression method is compression based on the information of the images before and after the compressed image, and the difference between the image in the vicinity of the time axis and the current image information for each clipped image area. A difference calculating means for calculating information is provided, and the difference calculating means is controlled so as to give movement information of the image cutout position.

[0016]

1 is a diagram showing the concept of a cutout image in an image communication system according to an embodiment of the present invention, FIG.
FIG. 3 is a conceptual diagram showing the whole of this image communication system. This image communication system is related to moving image communication such as a video conference and a digital image broadcast, for example, by applying a predetermined compression operation to a high-quality image obtained by capturing an image with a TV camera or the like, After reducing the capacity and transmitting the data through a general-purpose network such as a local area network or a public telephone line, the transmitted compressed data is decompressed and an image is displayed on a predetermined terminal such as a general personal computer. It is what you see. In particular, in this embodiment, as shown in FIG. 1, the data transmission is performed on the network by limiting the data communication to a part of the cut-out image area Gp of the maximum image area Ga initially obtained. The capacity is reduced, the transmission speed is increased, and the motion of the moving image on the receiving side is smoothed.

Specifically, this image communication system includes a television camera 11 and the television camera 11 as shown in FIG.
A moving image data transmission unit 1 that processes a captured image captured in
And a monitoring unit 3 connected to the moving image data transmission unit 1 through a general-purpose network 2 such as a public telephone line.

The moving image data transmitter 1 includes a video signal decoder 12 for converting a video signal sent from a general television camera 11 installed toward an object to be imaged into a digital signal, and the video signal decoder 12 A compression unit 13 that encodes a digital signal and compresses the data (encodes), and a cutout position control that specifies only cutout data corresponding to an image area to be transmitted of the data from the video signal decoder 12 and transmits it to the compression unit 13. A communication control unit 15 that receives and transmits various data between the unit 14 and the network 2, and a CPU 16 (control unit) for controlling each of these units.

The video signal decoder 12 always receives the NTSC signal sent from the television camera 11.
The NTSC signal is a color image signal based on the NTSC system, which is a standard system in the transmission format of color television signals, and has three components of a luminance signal and two types of color difference signals. The video signal decoder 12 samples and quantizes an analog NTSC signal and converts it into a digital signal. Also, this video signal decoder 12
Is a timing synchronization signal HSyn synchronized with the signal output.
c, VSync are extracted and output to the cutout position control unit 14 described later. Here, the first timing synchronization signal H
Sync is a timing signal that is issued from the output signal from the video signal decoder 12 in synchronization with the data output in dot units in the horizontal direction (first scanning direction) in FIG. 4, and is also the second timing synchronization. Signal VSync
Of the output signal from the video signal decoder 12 is a timing signal that is issued in synchronization with the data output of the line unit in the vertical direction (second scanning direction) in FIG.

The compression unit 13 is, for example, a general JP
For compressing a moving image by the EG method,
The input digital format NTSC signal is converted into RGB, for example.
Expressed in the density of each component in the color space of the color system (color space conversion), after converting the components in this color space into frequency conversion coefficients (frequency space conversion) that are components in the frequency space, The blocks are divided into blocks arranged in a matrix along two orthogonal scanning directions, and predetermined coding processing such as two-dimensional discrete cosine transform is performed. However, in each of the color space conversion, the frequency space conversion, and the encoding, each conversion process is performed only on a part of the area designated by the clipping position control unit 14 described later.

The cut-out position control section 14 is, as shown in FIG.
A horizontal dot management unit 21 for specifying a horizontal area in the image data captured by the television camera 11 and a vertical line management unit 22 for similarly specifying a vertical area.
Based on the outputs of the horizontal dot management unit 21 and the vertical line management unit 22, it is determined whether each data processed by the compression unit 13 is valid.
The effective pixel selection circuit 23 for transmitting to

The horizontal dot management unit 21 has a first timing extracted from the signal output from the video signal decoder 12 to the compression unit 13 in synchronization with an output signal in dot units for scanning the picked-up image in the horizontal direction. A horizontal dot number counter 31 that counts the number of output dots of the video signal decoder 12 based on the synchronization signal HSync.
And a horizontal cutout data counting unit 32 that performs a counting operation only for an area to be cut out in the entire area of the captured image out of those counted here. It should be noted that in order to enable data reception of the first timing synchronization signal HSync to the horizontal dot number counter 31, this first
An oscillator PLL for waveform shaping is provided in parallel with the timing synchronization signal HSync.

Here, the horizontal cutout data counting unit 3
As shown in FIGS. 3 and 4, 2 is a horizontal dot period counter 33 that counts a signal given from the horizontal dot number counter 31 with an upper limit of the total horizontal dot period H1 of the entire area of the captured image, and cutout. Number of misaligned dots (number of delayed dots) for all dot periods H1 in the image area
A horizontal effective dot delay counter 3 that counts the signal given from the horizontal dot number counter 31 with H2 as the upper limit.
4 and a horizontal effective dot number counter 35 that counts the signal given from the horizontal dot number counter 31 with the effective dot number H3 of the image area to be cut out as the upper limit.

The vertical line management unit 22 has a second timing extracted from the signal output from the video signal decoder 12 to the compression unit 13 in synchronism with the line-by-line output signal scanned in the vertical direction of the captured image. A vertical line number counter 41 for counting the number of output lines of the video signal decoder 12 based on the synchronization signal VSync.
And a vertical cutout data counting unit 42 that performs a counting operation only for an area that is desired to be cut out in the entire area of the captured image out of the ones counted here.

Here, the vertical cutout data counting unit 4
Reference numeral 2 denotes a vertical line period counter 43 that counts the signal given from the vertical line number counter 41 with the upper limit being the total vertical line period V1 of the entire captured image.
A vertical effective line delay counter 44 that counts a signal given from the vertical line number counter 41 with the upper limit of the number of position shift lines (the number of delay lines) V2 for the entire line period V1 of the image region to be clipped, and the image region to be clipped A vertical effective line number counter 45 for counting the signal given from the vertical line number counter 41 with the effective line number V3 as the upper limit.

In the cut-out position control section 14,
The total dot period H1 related to the horizontal dot period counter 33,
And the total line period V related to the vertical line period counter 43
1 is predetermined according to the size of the image captured by the TV camera 11 to be used and the size of the display screen of the terminal 57 on the monitoring unit 3 side (FIG. 2), and the horizontal effective dot number counter 1 The effective dot number H3 according to 35 and the effective line number V3 according to the vertical effective line counter 45 are determined in advance according to the expected transmission speed. In the specific example shown in FIG. 1, the following equations (1) and (2) are set to approximately hold.

H1 = 3 × H3 (1) V1 = 3 × V3 (2) Further, the delay dot number H2 and the delay line number V2 related to the horizontal effective dot delay counter 34 and the vertical effective line delay counter 44 are the network. 2, given from the terminal 57 on the side of the monitoring unit 3 described later through the communication control unit 15 and the CPU 16.

The communication control section 15 adjusts the output timing of the signal from the compression unit 13 and a modulator / demodulator (MODEM) that modulates the data from the compressed data buffer 51 so that it can be transmitted to the network 2. This is a general one having an interface unit 52 and an interface (NCU) 53 such as DSU.

The CPU 16 controls the various parts, and also the MODE.
It has a function of transmitting and receiving data to and from the M52 and the cutout position control unit 14 and transmitting the cutout position data designated by the monitoring unit 3 to the horizontal dot management unit 21 and the vertical line management unit 22. are doing.

As shown in FIG. 2, the monitoring unit 3 uses the network 2
A communication control unit 55 that receives and transmits various data from and to
A decompression processing unit 56 for decompressing (decoding) the image compressed data obtained by the communication control unit 55 through the network 2;
A terminal 57 is provided for displaying the image data decompressed by the decompression processing unit 56 and for designating an image area to be cut out on the display screen.

The decompression processing unit 56 decompresses the moving image data in the reverse procedure of the data compression process in the cutout position control unit 14, and the decompression process conforms to the general MPEG system. Is applied.

The designation of the cut-out image area in the terminal 57 is performed by the input device 58 such as a keyboard device or a mouse.
Operate and move the cursor on the screen. The data specified here is the delay dot number H2 and the delay line number V2.
Is sent to the communication control unit 55 and is transmitted to the cutout position control unit 14 of the moving image data transmission unit 1 via the network 2.

The operation of the image communication system having the above configuration will be described. First, as shown in FIG. 2, the operator on the side of the monitoring unit 3 operates the keyboard 57 of the terminal 57, the input device 58 such as a mouse, and moves the cursor on the screen to specify the cut-out image area. The position of the cropped image area at this time is
It is transmitted to the CPU 16 via the communication control unit 55, the network 2 and the communication control unit 15 on the moving image data transmission unit 1 side,
Recognized as "the number of delay dots H2" which is the upper limit value of the horizontal effective dot delay counter 34 of the horizontal dot management unit 21 and "the number of delay lines V2" which is the upper limit value of the vertical effective line delay counter 44 of the vertical line management unit 22. To be done.

In this state, the video signal of the NTSC format sent from the television camera 11 demodulates the digital image data by the video signal decoder 12, and the digital signal is sent to the compression unit 13. Also, from the digital signal output at this time, the horizontal dot number counter 31 of the horizontal dot management unit 21 and the vertical line number counter 41 of the vertical line management unit 22 extract the first timing synchronization signal HSync, and the vertical line management is performed. The vertical line number counter 41 of the unit 22 extracts the second timing synchronization signal VSync. In parallel with this, a clock signal C that regulates the basic operation timing
LK is given to the horizontal dot number counter 31 via the PLL.

Here, the horizontal cutout data counting section 3
The horizontal dot period counter 33 and the horizontal effective dot delay counter 34 of No. 2 start the count operation based on the instruction of the CPU 16 in synchronization with the count operation of the first timing synchronization signal HSync for each dot of the horizontal dot number counter 31. To do. At the same time, the vertical line period counter 43 and the vertical effective line delay counter 44 of the vertical cutout data counting section 42 are connected to the vertical line number counter 41.
The counting operation is started based on an instruction from the CPU 16 in synchronization with the counting operation for the second timing synchronization signal VSync for each line.

The horizontal cutout data counting unit 3
When the count result of the horizontal effective dot delay counter 34 reaches the upper limit “delayed dot number H2”, 2 outputs to that effect as a “delay completion signal Sh1 (see FIG. 4)” to the effective pixel selection circuit 23, and the horizontal Effective dot delay counter 34
Stops the counting operation, and then the horizontal effective dot number counter 35 starts the counting operation. In addition,
The horizontal dot cycle counter 33 continues the counting operation as it is. When the count result of the horizontal effective dot number counter 35 reaches the upper limit “effective dot number H3”,
The fact is output to the effective pixel selection circuit 23 as an “effective area completion signal Sh2 (see FIG. 4)”, and the horizontal effective dot number counter 35 stops the counting operation. The horizontal dot period counter 33 continues the counting operation as it is. Then, when the count result of the horizontal dot period counter 33 reaches the upper limit “total dot period H1”, the count values of the respective counters 33, 34, 35 are defaulted to zero,
Returning to the initial state again, the counting operations of the horizontal dot period counter 33 and the horizontal effective dot delay counter 34 are restarted.

On the other hand, the vertical cutout data counting section 42
When the count result of the vertical effective line delay counter 44 reaches the upper limit "the number of delay lines V2", the fact is output to the effective pixel selection circuit 23 as a "delay completion signal Sv1 (see FIG. 4)", and the vertical effective line is activated. The line delay counter 44 stops the counting operation, and then the vertical effective line number counter 45 starts the counting operation. The vertical line cycle counter 43 continues the counting operation as it is. When the count result of the vertical effective line number counter 45 reaches the upper limit "effective line number V3", the fact is output to the effective pixel selection circuit 23 as an "effective area completion signal Sv2 (see FIG. 4)", and the vertical The valid line number counter 45 stops the counting operation. The vertical line cycle counter 43 continues the counting operation as it is. Then, when the count result of the vertical line cycle counter 43 reaches the upper limit "total line cycle V1", each counter 4
The count values of 3, 44, and 45 are defaulted to zero, the initial state is returned to again, and the counting operations of the vertical line period counter 43 and the vertical valid line delay counter 44 are restarted.

Here, as can be seen from FIG. 4, the cut-out image area Gp designated by the operator on the monitoring section 3 side is in the maximum image area Ga and after the "delay completion signal Sh1" is issued. Limited to the area (Rv) until the "effective area completion signal Sh2" is issued (Rh) and from the "delay completion signal Sv1" to the "effective area completion signal Sv2" (Rv). Therefore, the effective pixel selection circuit 23 permits the compression operation of the compression unit 13 only when the Rh state and the Rv state are detected. As a result, only the image compressed data corresponding to the cut-out image area Gp is stored in the communication control unit 15 and the network 2.
Is transmitted to the monitoring unit 3 through the data, is subjected to data decompression processing by the decompression processing unit 56, and is then displayed on the display screen of the terminal 57.

Here, the compression method is MPEG / H26.
When the 1 method is adopted, the amount of data after compression can be reduced by comparing an image in the vicinity in the time axis direction with the current image and transmitting only the difference in image information. In the case of the image communication system of this embodiment, even when transmitting a still image, the image is clipped and transmitted while changing the clipping position, so that the entire image is in a moving state. In a compression method such as MPEG / H261, if the amount of image movement is too large, the difference between the image information is not sent, and the image is sent as the compressed data of the input image as it is, resulting in a large amount of transmission data. Will occur. At this time, it is possible to transmit the difference of the image information by moving the clipped image within the prediction range of the motion compensation of the compression unit.

As a compression method, MPEG / H261
When the method is adopted, a complicated calculation is required to extract the difference data of the image information, and the time required for the calculation becomes large. In this case, the calculation speed can be increased by applying the movement information of the cutout image to the difference calculation circuit (not shown) of the image information.

As described above, the operator can monitor the desired position on the display screen. When the cutout image area Gp is desired to be changed, the keyboard device of the terminal 57 or the input device 58 such as a mouse is operated to arbitrarily move the cursor on the screen to specify the cutout image area. If the position of the cut-out image area is transmitted to the CPU 16 via the communication control unit 55, the network 2 and the communication control unit 15 on the side of the moving image data transmission unit 1, the position is changed to an arbitrary position in the same manner as the above-described operation. It is possible to cut out an image.

As described above, since the maximum image area Ga is not received, but only a part of the cut-out image area Gp is received, network traffic is eased, images are transferred at high speed, and a moving image is generated. In this case, it is possible to prevent dropped frames and to configure the system at low cost.

In the above example, the effective dot number H3 and the effective line number V3 are registered as defaults as unique values, and only the delayed dot number H2 and the delayed line number V2 can be designated on the monitoring section 3 side. However, in addition to the delay dot number H2 and the delay line number V2, the effective dot number H3 and the effective line number V3 may be provided on the monitoring unit 3 side.

Alternatively, in the above example, the operator specifies the position on the display screen on the monitor section 3 side to set the position of the cut-out image area Gp in the moving image data transmitting section 1. As shown in FIGS. 5 and 6, under the control of the CPU 16, the delay dot number H2 and the delay line number V2 in the horizontal effective dot delay counter 34 and the vertical effective line delay counter 44 are linearly changed on the moving image data transmitting unit 1 side. By (incrementing), the cut-out image region Gp can be sequentially scanned in a predetermined direction according to a predetermined rule, and the television camera 11
It is possible to transfer the maximum image area Ga photographed in (1) with a time difference. 5 shows an example in which the cutout image area Gp is automatically scanned in the horizontal direction, and FIG. 6 shows an example in which the cutout image area Gp is automatically scanned in the vertical direction. In any of the examples, in the maximum image area Ga, (1a) to (1b)
(2a) to (2b) ... (3a) to (3b) in order, the cutout image area Gp moves all of the maximum image area Ga with a time difference according to a certain movement rule.

Furthermore, if a wide-angle camera equipped with a wide-angle lens whose visual field range is set to about 60 degrees or more is used as the television camera 11, even if only a part of the cut-out image area Gp is cut out, the monitoring unit It is possible to obtain an image of a sufficiently wide area that can be endured by the monitor at 3.
Therefore, if the above-described image communication system is applied to the field of a surveillance device or a video conference system for the purpose of finding an abnormal situation in the space of the imaging target, the surveillance unit 3
Only by designating the position of the cut-out image region Gp on the side, it is possible to obtain a picked-up image at an angle desired by the operator. In particular, since it is possible to move the captured image to be monitored up, down, left, and right as desired by the operator without requiring a complicated mechanical structure for swinging the television camera as in the conventional art, it is possible to drive the motor or drive a plurality of images. Since various mechanical structures for rotating the gear and the like can be omitted, an inexpensive and space-efficient image communication system can be provided.

Furthermore, in each of the above-described embodiments, the compression unit 13 has been described as an example of performing a two-dimensional discrete cosine transform process, but any method such as Markov model coding, Huffman coding, or subband coding is used. Of course, image data compression technology may be used.

In the above example, the public telephone line is used as the network 2, but a high-speed network line may be used. In this case, the MODEM 52 is not necessary.

[0048]

According to the first aspect of the present invention, the cutout position control unit limits the position of an arbitrary cutout image area out of the entire area of the moving image data, and compresses only a part of the cutout image area. The transmission speed can be dramatically increased because the transmission is performed by transmitting. Therefore, it is possible to reduce network traffic, and it is also possible to prevent dropping frames when moving images are transferred by transferring images at high speed.

By changing the position of the cut-out image area in the entire area of the moving image data, the entire area of the moving image data can be transferred with a time difference.

According to the second aspect of the present invention, the moving image data transmitting unit can transmit data with respect to an arbitrary cut-out image area designated and input by the input device on the monitoring unit side. It is possible to freely receive any clipped image.

According to the third aspect of the present invention, the entire maximum image area can be automatically moved with a time difference without the operator performing a specific operation.

According to the invention described in claim 4, the field of view of the TV camera is expanded by the wide-angle lens without using a particular swinging mechanism for the TV camera, and the image is cut out within the expanded maximum image area. By moving the image area, it is possible to change the monitor target, and since a complicated mechanical structure is not required, an inexpensive image communication system can be realized.

According to the invention described in claim 5, when the compression method is a compression method based on the information of the images before and after the compressed image, the movement of the image cutout position is within the prediction range of the motion compensation of the compression unit. Since the control is performed, it is possible to easily transmit only the difference between the image information before and after each clipped image area and the current image information, and it is possible to reduce the transmission data amount and increase the transmission speed.

According to the sixth aspect of the present invention, when the compression method is a compression method based on the information of the images before and after the compressed image, control is performed so as to give movement information of the image cutout position to the difference calculation means. Therefore, the difference information between the image in the vicinity of the time axis for each clipped image area and the current image information can be easily calculated, and the calculation speed can be increased.

[Brief description of drawings]

FIG. 1 is a diagram showing a clipped image of an image communication system according to an embodiment of the present invention.

FIG. 2 is a block diagram showing an entire image communication system according to an embodiment of the present invention.

FIG. 3 is a block diagram showing a moving image data transmission unit according to an embodiment of the present invention.

FIG. 4 is a diagram showing a concept of a clipped image in the image communication system according to the embodiment of the present invention.

FIG. 5 is a diagram showing another example of a clipped image of the image communication system of the present invention.

FIG. 6 is a diagram showing another example of a clipped image of the image communication system of the present invention.

[Explanation of symbols]

 1 Moving Image Data Transmission Section 2 Network 3 Monitoring Section 11 TV Camera 12 Video Signal Decoder 13 Compression Unit 14 Clipping Position Control Section 15 Communication Control Section 16 CPU 21 Horizontal Dot Management Unit 22 Vertical Line Management Unit 23 Effective Pixel Selection Circuit 31 Horizontal Dot Number counter 32 Horizontal cutout data count unit 33 Horizontal dot period counter 34 Horizontal effective dot delay counter 35 Horizontal effective dot number counter 41 Vertical line number counter 42 Vertical cutout data count unit 43 Vertical line period counter 44 Vertical effective line delay counter 45 Vertical effective Line number counter 51 Compressed data buffer 52 MODEM 53 NCU 55 Communication control unit 56 Expansion processing unit 57 Terminal H1 Total dot period H2 Delayed dot number H3 Effective dot number HSync, VSync Timing Sync Signal HSync Timing Sync Signal HSync First Timing Sync Signal PLL Oscillator V1 Total Line Cycle V2 Delay Line Count V3 Effective Line Count VSync Second Timing Sync Signal

Claims (6)

[Claims] 1. A moving image data transmitting unit that processes moving image data, and a monitoring unit connected to the moving image data transmitting unit through a predetermined network, wherein the moving image data transmitting unit is A cutout position control unit that limits the position of an arbitrary cutout image region of the entire region, a compression unit that compresses moving image data corresponding to the cutout image region limited by the cutout position control unit, and the compression unit. A communication control unit for transmitting the compressed moving image compressed data to a network, wherein the cutout position control unit has means for changing the position of the cutout image region in the entire region of the moving image data. Image communication system. 2. The image communication system according to claim 1, wherein the monitoring unit expands the compressed moving image data received through the network into moving image data of a predetermined format, and the expansion unit. A terminal for displaying a moving image on the screen based on the moving image data decompressed by the processing unit, and an input device for designating and inputting a position of an arbitrary cutout image area to be received with respect to the cutout image displayed on the terminal. And the cutout position control unit of the moving image data transmission unit,
An image communication system comprising: means for changing the position of the cutout image area in the entire area of the moving image data so as to correspond to the cutout image area designated and input by the input device of the monitoring unit. 3. The image communication system according to claim 1, wherein the moving image data transmitting unit sequentially scans the cutout image area in a predetermined direction according to a predetermined discipline, and all of the maximum image area is obtained. An image communication system, comprising: a control unit for controlling the movement of the images in a time-difference manner. 4. The image communication system according to claim 1, claim 2, or claim 3, wherein the moving picture data transmission unit is provided with a television camera for picking up a moving image of an imaging target. An image communication system characterized in that a wide-angle lens is attached to the. 5. The image communication system according to claim 1, 2, or 3, wherein the compression method is compression based on information of images before and after the compressed image, and the cut-out image region. An image communication system characterized by controlling movement of an image cutout position within a motion compensation prediction range of a compression unit when transmitting only a difference between preceding and following image information and current image information. 6. The image communication system according to claim 1, 2, or 3, wherein the compression method is compression based on information of preceding and following images of the compressed image, and the cutout image area. An image communication system characterized by including difference calculation means for calculating difference information between each image near the time axis and current image information, and controlling the difference calculation means to give movement information of the image cutout position. .