JP2002064789A - Image compression recording transmission apparatus and image compression transmission apparatus - Google Patents

Abstract

[PROBLEMS] To simultaneously perform image recording and / or image distribution at a compression operation interval and image quality satisfying required quality on a recording device and two different networks such as a network such as a LAN and a public line. . An image compression unit is operated in a time-division manner while changing the quality of compression. As a result, high image quality for recording and real-time property for image distribution can be satisfied at the same time.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image compression recording apparatus and an image compression transmission apparatus for compressing and recording an image and transmitting the compressed image to a network such as a LAN line or a public line.

[0002]

2. Description of the Related Art At present, an apparatus for compressing an image at a specific compression operation interval and quality and recording it on a recording means, and an image compression recording communication apparatus for sequentially transmitting a compressed image over a network such as a LAN line or a public line. It has been known. The image compression recording communication device is used in a surveillance camera system or the like that compresses, records, and transmits an image input from a surveillance camera.

[0003]

In such an image compression recording communication apparatus, no method is considered in which recording and transmission are performed in parallel using one compression circuit, and a compressed image is transmitted in real time. Was. Therefore, when recording and transmission are performed in parallel by the compressed image recording / transmission device, there are the following problems.

The operation and compression timing of the image compression / recording communication apparatus will be described below with reference to FIGS. 3A and 6.

The communication system shown in FIG. 6 includes an image compression / recording communication device H401 and an image expansion communication device I412. The image compression recording communication device H401 includes a compression circuit 4
02, memory 403, communication circuit 404, decompression circuit 40
5, recording device 406, control circuit 407, image input terminal 4
08, an image output terminal 409, and a communication terminal 410. The image decompression communication device I412 includes a control circuit 41
3, communication circuit 414, memory 415, decompression circuit 416,
It comprises a communication terminal 417 and an image output terminal 418. The network 411 represents a network configured from a LAN line, a public line, and the like.

The operation of the image compression / recording communication device H401 and the image decompression communication device I412 will be described below.

The image decompression communication device I412 is, for example, a TC
A connection is established with the image compression recording communication device H401 using a network protocol such as P / IP. The image decompression communication device I412 and the image compression / recording communication device H401 exchange control commands and responses according to a predetermined protocol, thereby enabling remote operation of the image compression / recording communication device H401.

Here, the operation when the image expansion communication device I412 sends a recording command to the image compression recording communication device H401 will be described. An image from a camera or the like is input to the compression circuit 402 via the image input terminal 408. Compression circuit 4
At 02, the input image is compressed at the specified compression operation interval and quality. Then, the compressed image is temporarily recorded in the memory 403. The temporarily recorded compressed image is
The data is recorded in the recording device 406 according to an instruction from the control circuit 407. At the time of reproduction, the recorded image is read out to the memory 403, decompressed by the decompression circuit 405, and output from the image output terminal 409 to a monitor (not shown). Further, the recorded compressed image can be sent to an image expansion communication device I 412 as a remote control device via the network 411. To distribute a compressed image to the network in real time, the image input from the image input terminal 408 is compressed by the compression circuit 402. The compressed image is temporarily recorded in the memory 403, and is transmitted from the communication circuit 404 to the network according to an instruction from the control circuit 407. The transmitted compressed image is received by the communication circuit 414 of the image expansion communication device I 412, and is temporarily recorded in the memory 415. The recorded image is read from the memory 415 according to a command from the control circuit 413, expanded by the expansion circuit 416, and output to a monitor (not shown) via the image output terminal 418.

FIG. 3A shows an example of image compression timing in the image compression recording communication device H401. The vertical synchronization signal 201 is a basic synchronization signal of the system.
This is a vertical synchronization signal of the TSC signal. The present apparatus compresses the NTSC image updated 60 times per second based on the vertical synchronization signal. When compressing the image at 30 frames per second, the image is compressed once every two periods of the vertical synchronization signal 201. Compression may be performed. Therefore, the image compression periods 202, 203,
The image compression operation is performed on 204 and 205, and the image compression operation is not performed during the remaining period. On the other hand, if the compression operation is performed each time in the period of the vertical synchronization signal, about 60 images are compressed in one second.

However, the recording device 406 is much faster than the network 411. For example, the data writing speed to a hard disk which is one of the recording devices reaches 10 MByte / s. 100B, the fastest class of network device
The data transfer rate to ase-Tx Ethernet (registered trademark) is only a few MByte / s, and only 8 kByte / s in the ISDN public line. Attempting to simultaneously execute recording and transmission using such a device causes the following problems. First, when recording is prioritized, the compression ratio is kept low to about 1/10 so that the image quality degradation during compression is not conspicuous. Therefore, if the original image is a 4: 2: 2 YUV signal with 720 horizontal pixels and 240 vertical pixels, the data amount after compression is 270 kbits. For example, if this is transferred via a 64 kbps ISDN line, one picture is sent. It takes more than 4 seconds. This makes it impossible to deliver a compressed image to a remote location in real time. On the other hand, in order to give priority to transmission and create five images that can be updated per second at the transfer rate of ISDN, the data amount of one compressed image is 12.8 kbit, and the compression ratio is 1/200 or more. Therefore, the compressed image has an extremely low image quality compared to the original image, and is not suitable for an image to be recorded in a recording apparatus.

As described above, in order to execute recording and transmission simultaneously in parallel, it is necessary to simultaneously satisfy high image quality for recording and real-time property for distribution. No consideration was given to such points.

Two circuits, a recording compression circuit and a transmission compression circuit, are provided, and images obtained in real time are supplied to the two compression circuits, respectively, and compressed by the transmission compression circuit and the recording compression circuit. Although a configuration in which the rates are different can be considered, such a configuration requires two compression circuits, and has a problem that the entire circuit becomes large and the cost increases.

[0013] This problem is exactly the same when attempting to simultaneously transmit data to two networks (for example, a LAN and a public line) having different transmission bands.

[0014]

According to the present invention, recording and transmission are performed in parallel by a single compression circuit, and the first compression circuit is used to simultaneously satisfy high image quality for recording and real-time property for distribution. As means, the recording and communication compression circuits are shared and used, and the recording compression data and the transmission compression data are generated in a time-division manner, so that the recording compression data and the transmission compression data have different compression ratios.

As a second means for solving the above-mentioned problem, after generating compressed data for recording by a compression circuit,
The obtained image is thinned out and transmitted. In addition,
In this case, the same compression ratio is used for recording and transmission.

According to the above method, high image quality for recording and real-time property for image distribution can be simultaneously satisfied.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the image compression recording communication device of the present invention is applied to network distribution and recording in a recording device will be described below with reference to the drawings. First,
FIG. 1 shows a first embodiment of the image compression / recording communication device and the image decompression communication device of the present invention. In the present embodiment, the generation of compressed images for recording and communication is performed in a time-division manner by a common compression circuit.

The apparatus shown in FIG. 1 includes an image compression / recording communication device A1 and an image decompression communication device B1 which are image compression / recording transmission devices.
It consists of two.

The image compression communication device A1 includes a compression circuit 2, a memory 3, a communication circuit 4, a decompression circuit 5, a recording device 6, a control circuit 7, an image input terminal 8, an image output terminal 9, and a communication terminal 10.
It is composed of The communication circuit 4 is a transmission circuit that transmits an image. In the present embodiment, the communication circuit 4 has not only transmission but also a communication function for exchanging with the image decompression communication device B12. The recording device 6 is an HDD or DVD
-It is composed of a recording medium such as a RAM and a recording circuit for recording on the recording medium. The image decompression communication device B12 includes a control circuit 13, a communication circuit 14, a memory 15, a decompression circuit 16,
It comprises a communication terminal 17 and an image output terminal 18. Further, the image compression communication device A1 and the image expansion communication device B12
Are connected by a network of an ISDN line 11 which is a communication circuit.

The operation of the image compression communication device A1 and the image expansion communication device B12 will be described below.

The image decompression communication device B12 is a TCP / IP
The connection with the image compression / recording communication device A1 is established using a protocol. Image expansion communication device B12 and compression recording communication device A1
Exchanges control commands and responses according to a predetermined protocol, thereby enabling remote operation of the image compression / recording communication device A1.

Next, the operation of the image compression / recording communication apparatus A1 when receiving an image transmission command from the image expansion / reproduction apparatus B12 will be described. The video signal of the camera is input from the image input terminal 8. The input circuit generates a transmission compressed image at the compression operation interval and quality specified by the image expansion / reproduction device B12 by the compression circuit 2. Further, a compressed image for recording may be generated in the recording device 6 at the compression operation interval and quality set in the control circuit 7. The compression ratio between the compressed image for the recording circuit and the transmission image is made different so that the compression ratio of the transmission compressed data is higher than that of the recording compression data. The compressed image is distributed to the recording device 6 and the transmission image is distributed to the communication circuit 4 by the memory 3 controlled by the control circuit 7. The compressed image recorded in the recording device 6 is read out from the recording device 6 in accordance with a reproduction command of the control circuit 7 and is temporarily recorded in the memory 3. The compressed image temporarily stored in the memory 3 in accordance with the instruction of the control circuit 7 is expanded by the expansion circuit 5, output from the image output terminal 9, and displayed on a monitor (not shown). The compressed image data sent to the compression recording communication device A1 is connected to the image expansion / reproduction device B12 via the ISDN line 11 using the TCP / IP protocol, and the compressed image data, the image compression set value, and the recording start The control data for the image compression / recording communication device A1 such as stop / stop is transferred to the image expansion communication device B.
Communicate with 12. The compressed image temporarily stored in the memory 15 is decompressed by the decompression circuit 16 according to a command from the control circuit 13 of the image decompression communication device B12, output from the image output terminal 18, and displayed on a monitor (not shown).

Hereinafter, the timing of performing compression in a time-division manner in the compression circuit 2 will be described. In the following example, 60 seconds
An example will be described in which a recording image and a communication image are generated at intervals of 15 frames from input images. FIG. 3B) shows the compression timing when compression is performed at 15 frames per second for recording to the recording device 6 and transmission to the ISDN line 11, respectively. As described above, the NTSC signal is output at about 60 per second.
The images have been updated times. In the case of this device, the compression of the recording image to the recording device 6 and the compression of the transmission image to the ISDN line 11 are alternately performed every four vertical video periods of the vertical synchronization signal 206 of the video. The setting value 213 for the transmission to the ISDN line 11 is set in the vertical retrace period immediately after the end of the recording image compression ENC1-1 (207) to the recording device 6, and the transmission to the ISDN line 11 is performed in the subsequent vertical video period. The image compression ENC2-1 (209) is performed. Nothing is performed in the following two periods of the video period, and in the next vertical retrace period, setting 212 of the recording setting value to the recording device 6 is performed.
The image compression for recording ENC1-2 (208) is performed. Hereinafter, by repeating the above operation, image compression for recording to the recording device 6 and image compression for transmission to the ISDN line 11 are performed at 15 frames per second, respectively.

Similarly, it is also possible to separate the compression processing periods for both, such as 15 frames per 4 vertical periods for recording and 7.5 frames per 8 periods for ISDN. Yes, other than 15 frames per second is acceptable.

As described above, according to the present embodiment, compressed images are generated at different compression operation intervals and qualities for transmission and recording, so that the network is sequentially reproduced with the best image quality according to the line quality. On the other hand, by performing recording at a higher quality and / or a shorter compression operation interval than an image transmitted to the network, detailed image data that cannot be obtained by sequential reproduction on the network can be stored in the recording device. Also, a plurality of types of compressed images having different compression operation intervals and / or qualities can be created with a small number of components without mounting a plurality of image compression circuits.

An embodiment in which the image compression recording communication apparatus of the present invention is applied to distribution to two networks having different transmission bands will be described below with reference to the drawings. FIG. 2 shows a block diagram of a second embodiment of the image compression communication device and the image expansion communication device of the present invention.

The apparatus shown in FIG. 2 is an image compression communication apparatus C101.
And image expansion communication device D112, image expansion communication device E1
19 is comprised. The image compression communication device C101 includes a compression circuit 102, a memory 103, a communication circuit 104, a control circuit 105, an image input terminal 106, and a communication terminal 107. The image decompression communication device D112 includes a control circuit 11
3, communication circuit 114, memory 115, decompression circuit 116,
The image expansion communication device E119 includes a communication terminal 117 and an image output terminal 118. The image expansion communication device E119 has a control circuit 120, a communication circuit 121, and a memory 12 similar to the image expansion communication device D112.
2, expansion circuit 123, communication terminal 124, image output terminal 1
25. Further, the image compression communication device C10
1 performs data communication with the image decompression communication device E 119 via the 100 Mbps LAN network 108, and communicates with the image decompression device E 112 at 100 Mbps L.
64 kbps by routing from the AN network 108 by the gateway device X109 such as a router or PC
ISDN line 110 and ISDN line 1
Data communication is performed via a gateway device Y111 that connects the communication device 10 and the communication circuit 114 of the image decompression device E112.

The operation of the image compression communication device C101, the image expansion communication device D112, and the image expansion communication device E119 will be described below.

The image expansion communication device D112 and the image expansion communication device E119 connect to the image compression communication device C101 using the TCP / IP protocol. Image expansion communication device D112, image expansion device F119, and compression communication device D10
Reference numeral 1 enables remote control of the image compression communication device C101 by exchanging a control command and a response using a predetermined protocol.

Next, an operation when an image transmission command is received from the image decompression / reproduction device E112 and / or the image decompression / reproduction device F119 will be described. The video signal of the camera is input from the image input terminal 106. The input image is sent to the compression circuit 10
2, for distribution to the ISDN line 110 sent to the image decompression communication device D112 and to the image decompression communication device E119 at the compression operation interval and quality specified by the image decompression communication device D112 and the image decompression communication device E119. The image is compressed for distribution to the LAN network 108 to generate a compressed image and temporarily recorded in the memory 103. The compressed image temporarily recorded in the memory 103 is transmitted to the LAN network 108 and the ISDN by the communication circuit 104.
Through the line 110, the image decompression communication device D11
2 and the image decompression communication device E119. The image decompression device F119 transmits the T
Image compression communication device C1 using CP / IP protocol
01, the image compression communication device C1
Connect to 01. Then, the image decompression communication device E119
The transmission of the compressed image data for transmission from the image compression communication device C101 to the image expansion communication device E119 and the image expansion communication device E11 are controlled by the control circuit 120 of the device.
The communication of the control command for the image compression communication device C101 such as the change of the transmission image compression set value to 9 and the start / stop of recording is performed.
The image decompression communication device D112 is also an image decompression communication device E11.
9, communication is performed using the TCP / IP protocol, but the image compression communication device C101 is not directly connected, and
Gateway device Y111 connecting network 108 and ISDN line, ISDN line and image decompression communication device D11
Communication is performed via a gateway device Y111 connecting the two. The communication data from the image decompression communication device D112 is routed by the gateway device Y111, and specifies the IP address of the gateway device X109, and
The communication data is distributed to the gateway device X109 via the DN line 110. The gateway device X109 performs routing and transmits communication data to the image compression recording device D101. The image decompression communication device D112 controls the image compression communication device C under the control of the control circuit 113 of the device.
Transmission of the compressed image data for transmission from 101 to the image decompression communication device D112, communication of the control command for the image compression communication device C101 such as change of the transmission image compression set value to the image decompression communication device D112, recording start / stop, etc. Do. The compressed image sent to the image expansion communication device D112 is temporarily recorded in the memory 115. The memory 1 is controlled by an instruction from the control circuit 113.
The compressed image temporarily recorded in 15 is expanded by an expansion circuit 116, output from an image output terminal 118, and displayed on a monitor (not shown). Further, the image decompression communication device E11
9 also expands the compressed image according to a command from the control circuit 120, outputs the compressed image, and displays it on a monitor (not shown).

The image compression for recording and the image compression for distribution are each performed for 15 seconds.
The compression timing when recording and distributing one compressed image is the same as the compression timing of the recording device 6 and the image decompression communication device B12 shown in FIG.
It is the same as the one replaced with the compression timing for distribution to the image expansion communication device E119.

As described above, according to the present embodiment, by generating compressed images at different compression operation intervals and qualities in accordance with the respective network line bandwidths, it is possible to sequentially generate a plurality of corresponding networks. It is possible to provide an image having the best image quality within a range that can be reproduced. Although only the compression process has been described here, the first
Similarly to the embodiment, a reproducible device including a recording device and a decompression device can be used.

Next, a description will be given of a third embodiment, which is an operation when a plurality of types of image compression operation periods are overlapped, with reference to FIGS. 2 and 3C). The case where the image compression operation periods are overlapped means that the image compression operation interval for distribution to the LAN network 108 is 30 seconds and the image compression operation interval for distribution to the ISDN line 110 is 1 second. 1
Once every second, it means that the image compression operation interval for distribution to the LAN network 108 and the image compression operation interval for distribution to the ISDN line 110 overlap. In such a case, in the present invention, as shown in the image compression ENC3-3 (218) for distribution to the LAN network 108 and the image compression ENC4-1 (220) for distribution to the ISDN line 110 in FIG. The control circuit 10 of the image compression communication device C101
5 is set in advance and, for example, the image compression period for distribution to the ISDN line 110 is set to be delayed, the image compression ENC 4-1 (220) for distribution to the ISDN line 110 is set to the ISDN Image compression is performed by shifting the image compression for distribution to the line 110 ENC4-1 '(221) one vertical cycle later. As a result, it is possible to avoid contention in the image compression operation.

[0034] This overlapping operation is performed when the recording image and the transmission image overlap each other, that is, when the recording image compression operation interval is set to 30 seconds and the transmission image compression operation interval is set to the second. Once per second, such as when using one LAN
The same applies to the case where the image compression operation interval for transmission to the network 108 and the image compression operation interval for recording overlap, and when they overlap, image compression is performed by shifting the timing of image compression for recording by one vertical cycle period. According to the present embodiment, the first
In addition to the effects of the second embodiment, it is possible to further prevent contention of image compression operations.

It should be noted that the shift may be performed one vertical cycle period before, instead of shifting one vertical cycle period later.

Next, a fourth embodiment will be described. In the fourth embodiment, the number of recorded compressed data for recording is different from the number of transmitted compressed data for transmission. A fifth embodiment will be described with reference to FIGS. Image input terminal 3
08, image output terminal 309, decompression circuit 305, communication circuit 304, recording device 306, communication terminal 310, communication circuit 3
11. The image decompression communication device G312 performs the same operation as that described in the second embodiment.

The data input from the image input terminal 308 is input to the compression circuit 302, and performs a compression operation at the compression rate and compression interval transmitted from the control circuit 307 or the image expansion communication device G312. The difference from the first embodiment is that the compression circuit 302 generates compressed data to be recorded by the recording device 306 instead of performing the compression operation in a time-division manner. In the compression circuit 302, a delimiter identification code such as 0xFFFFFFFF (hexadecimal) is inserted so that the beginning and end of the data of one image unit can be easily recognized so that the thinning circuit 319 can efficiently perform the thinning. Temporarily in the memory 303. The image temporarily stored in the memory 303 is recorded on the recording device 306 and is supplied to the thinning circuit 319 at the same time. The decimation circuit 319 discriminates the delimiter identification code, decomposes the image data into one-image units, and converts the image recorded in the memory at 60 or 30 seconds into the memory for 15 seconds to meet the communication speed of the ISDN 311. Thinning out so as to be 7.5 sheets or 7.5 sheets per second. With this configuration, an image can be transmitted in real time, and an image at a shorter interval than an image to be communicated can be recorded in the recording device.

In the above embodiment, the control circuit, the compression / decompression circuit, and the thinning-out circuit are implemented by hardware, but these can be of course configured by software. Further, by controlling the memory reading of the control circuit without specially providing the thinning circuit, the fourth
Can be configured. Therefore, the thinning circuit is not limited to one configured by hardware.

Hereinafter, the timing of thinning will be described with reference to FIG. In the following example, it is assumed that a compressed image having a compression interval of 30 seconds is recorded in the recording device 306 at intervals of 30 seconds, and transmitted to the communication circuit 304 at intervals of 15 seconds. The input image is subjected to E by the compression circuit 302.
NC1 (223), ENC2 (224), ENC3 (2
25) At the timing of ENC4 (226), compression of 30 frames per second is performed and the data is primarily recorded in the memory 303. Memory 3
03 is ENC1 (223),
ENC2 (224), ENC3 (225), ENC4
The data is input to the recording device 306 and the thinning circuit 319 at the timing of (226). The recording device 306 performs recording at the same timing. Also, in the thinning circuit 319, E
By discarding the image data of NC2 (232) and ENC4 (234) and transmitting only the image data of ENC1 (231) and ENC3 (233) to the communication circuit 304,
The distribution to the ISDN line 311 is performed with a compression interval of 15 frames per second. In order to realize the thinning circuit 319 by software, the control circuit controls the image data transmitted from the memory 303 to the communication circuit 304 so that one image data is read every two images instead of every image.
ISDN1 by thinning out recorded images at intervals of 15
1 can be sent.

[0040]

According to the present invention, an image for recording and / or distribution can be created in real time. Also,
Simultaneous execution of recording and network distribution and simultaneous distribution to two different networks are possible.

[Brief description of the drawings]

FIG. 1 is a first diagram of an image compression communication device and an image expansion communication device.
Block diagram showing an embodiment of the present invention.

FIG. 2 illustrates a second example of the image compression communication device and the image decompression communication device.
Block diagram showing an embodiment of the present invention.

FIG. 3 is a diagram showing image compression timing.

FIG. 4 is a fourth diagram of the image compression communication device and the image decompression communication device.
Block diagram showing an embodiment of the present invention.

FIG. 5 is a diagram showing the timing of thinning.

FIG. 6 is a diagram illustrating an embodiment of an image compression recording communication device.

[Explanation of symbols]

1: image compression recording communication device A 2, 102, 302, 402 ... compression circuit 3, 103, 115, 122, 303, 403, 415
... Memory 4, 14, 104, 114, 121, 304, 404,
414 communication circuit 5, 16, 23, 116, 123, 305, 405, 4
16: expansion circuit 6, 306, 406: recording device 7, 13, 105, 113, 120, 307, 407,
413: control circuit 8, 106, 308, 408 ... image input terminal 9, 18, 118, 125, 309, 409, 418 ...
Image output terminal 10, 17, 107, 117, 124, 310, 41
0, 417: Communication terminal 11, 110, 311: ISDN line 12: Image expansion communication device A 21: Image compression communication device B 101: Image compression communication device C 108: LAN network 109: Gateway device X 111: Gateway device Y 112 ... Image expansion communication device D 119 Image expansion communication device E 301 Image compression recording communication device F 312 Image expansion communication device G 319 Thinning circuit 401 Image compression recording communication device H 411 Network 412 Image expansion communication device I 201, 206, 215... Vertical synchronization signals of image signals 202, 203, 204, 205, 223, 224, 2
25, 226, 227, 228, 229, 230, 23
1, 233: Image compression period 207: Image compression ENC1-1 for distribution to recording device 6 208: Image compression ENC1-2 209 for distribution to recording device 6 Image compression ENC2 for distribution to ISDN line 11
-1 210 ... Image compression ENC2 for distribution to ISDN line 11
-2 211, 212: Setting of distribution setting values to the recording device 6 213, 214: Setting of distribution setting values to the ISDN line 11 216: Image compression ENC 3-1 217: LAN network for distribution to the LAN network 108 Image compression ENC3-2 218 for distribution to LAN 108 Image compression ENC3-3 219 for distribution to LAN network 108 Image compression ENC3-4 220 for distribution to LAN network 108 Image compression ENC for distribution to ISDN line 110
4-1 221 ... Image compression ENC for distribution to ISDN line 110
4-1 '222: Setting of distribution setting value to LAN network 108 223: Setting of distribution setting value to ISDN line 110 232, 234 ... Image thinning timing

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 7/24 H04N 5/91 K 7/18 7/13 Z (72) Inventor Tomoyuki Kurashige Yokohama-shi, Kanagawa 292 Yoshida-cho, Totsuka-ku, Hitachi Image Information Systems, Ltd. (72) Inventor Hiroaki Kami 292 Yoshida-cho, Totsuka-ku, Yokohama, Kanagawa, Japan Hitachi Image Information Systems (72) Inventor Norihiko Nakano Yokohama, Kanagawa 292 Yoshida-cho, Itotsuka-ku F-term (reference) 5D053 FA11 GA11 GB28 KA03 LA01 LA14 LA14 5C054 AA01 AA05 CA04 CC03 DA01 DA09 EA01 EA03 EA07 EG04 EG05 EG10 HA18 5C059 KK34 RB01 PP07 SS06 SS11 TA60 TB05 TC38 TD19 UA02 UA05 UA33 5K030 GA11 HA02 HB02 HB17 HC01 HC14 HD05 KA02 KA19 LA07

Claims (7)

[Claims] An image compression circuit for compressing an input image, a recording circuit for recording a compressed image, and a transmission circuit for transmitting a compressed image to the outside, wherein the image compression circuits have different compression rates. A compressed image for a recording circuit and a compressed image for the transmission circuit are generated in a time-division manner, the recording circuit records the compressed image for the recording circuit output from the image compression circuit, and the transmission circuit includes: An image compression recording transmission apparatus for transmitting a compressed image for the transmission circuit output from the image compression circuit. 2. An apparatus according to claim 1, wherein said image compression circuit alternately generates a compressed image for said recording circuit and a compressed image for said transmission circuit. 3. The apparatus according to claim 1, wherein the image compression circuit makes compression timing different between the compressed image for the recording circuit and the compressed image for the transmission circuit. . 4. When the image compression operation periods of the compressed image for the recording circuit and the compressed image for the transmission circuit overlap, the compression operation having a higher priority is given priority, and the compression operation having a lower priority is performed. The image compression recording transmission apparatus according to claim 3, wherein the compression operation is performed before or after the compression operation period. 5. An image compression circuit for compressing an input image, and a transmission circuit for transmitting a compressed image output from the image compression circuit to a plurality of networks having different transmission bands, wherein the image compression circuit comprises: An image compression transmission apparatus characterized in that compressed images having a plurality of compression rates corresponding to a plurality of networks having different transmission bands are generated in a time-division manner. 6. When a plurality of types of image compression operation periods corresponding to each of said plurality of networks overlap, priority is given to a compression operation having a higher priority, and a compression operation having a lower priority is performed. The image compression transmission apparatus according to claim 5, wherein the compression operation is performed before or after the period. 7. An image compression circuit for compressing an input image, a recording circuit for recording a compressed image output from the compression circuit, a thinning circuit for thinning out a compressed image output from the compression circuit, A transmission circuit for transmitting the output thinned-out compressed image to an external device.