JP2000253400A - Image data conversion communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain an image data conversion communication system where image data such as supervisory data of a state of a remote place can be monitored by a moving picture even in the case of sending/receiving the image data through companding by means of a premises PHS or a LAN or the like and a clear still picture can be viewed at the same time, if required. SOLUTION: The image data conversion communication system consists of an image pickup device 1, a display device 5, a small-sized image data conversion transmitter 2, a small-sized image data conversion receiver 4, and a private communication network 3. In this case, the small-sized image data conversion transmitter 2 is provided with a decoder section 21 that converts an input video signal into a digital image, an encoder section 22 that converts the digital image into an output video signal, CODEC sections 24, 35 that compand the digital image, a communication section 28, an image recording section 27, a unit control section 29 or the like and also with a bus changeover section 23 that select connection of buses interconnecting the decoder section 21, the encoder section 22, and the CODEC sections 24, 25. The CODEC section consists of a moving picture compression section 24 that entirely compresses consecutive image data and of a still picture companding section 25 that compands one of image data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image data conversion communication system, and more particularly, to an image data conversion communication device for compressing image data composed of digital signals and transmitting or receiving the data at 64 kbps or less and expanding it. The present invention relates to a data conversion communication system.

[0002]

2. Description of the Related Art Image data, for example, surveillance image data at a distant place, is transmitted to a local PHS (simple portable telephone network), a LAN, or the like.
2. Description of the Related Art Transmission and reception are performed by a local communication network such as a (local information communication network). A conventional image data conversion communication system includes an imaging device, a small image data conversion transmission device, a private telephone network, a small image data conversion reception device, and a display device. Since the conventional small-sized image data conversion and transmission device uses a communication capacity of 64 kbps or less, in particular, FIG.
, An NTSC decoder unit 21 ′, an NTSC encoder unit 22 ′, a CODEC unit, an image recording unit 27 ′,
It consisted of a communication unit 28 'and a device control unit 29'. N
TSC decoder section 21 'and NTSC encoder section 22
'Inputs or outputs image data. The CODEC unit converts the image data into H.264 data. 261 CODEC (moving image compression / expansion method) 24 'or JPEG CODEC (still image compression / expansion method) 25'. H. 261 COD
EC24 'is suitable for use in transmitting and receiving a large amount of time-series image data.
Although information about finer shapes is lost and coarser than the original image, the image can be transmitted and received in a short time. JPEG
The CODEC 25 'is suitable for accurately transmitting and receiving a small amount of image data. The obtained image is good in that the information lost from the original image is small, but it takes a long time to transmit and receive a large amount of image data. And The image recording unit 27 ′
Record the image data. The communication unit 28 'is a local communication network 3.
The image data is transmitted / received to / from the small-sized image data conversion receiving apparatus which is the partner terminal 4 'via the'. The device control unit 29 '
Controls the entire device.

[0003] In the conventional small image data conversion receiving apparatus, since the communication capacity is 64 kbps or less, the same apparatus as the small image data converting and transmitting apparatus is used as the receiving apparatus side.

[0004] A small-sized image data conversion transmitting apparatus and a receiving apparatus used in a conventional image data conversion communication system compress and transmit input image data and record or receive the compressed image data as necessary. Was expanded and output, and recorded as needed. As the compression / expansion method, when a large amount of moving image data is transmitted / received, a short time is sufficient, but the screen is rough. In order to transmit and receive a small amount of still image data, it is necessary to select one of the two methods to use the JPEG method, which requires a long time but has a clear screen. Therefore, when one compression / expansion method is adopted, the other compression / expansion method cannot be adopted at the same time. For example, when you monitor a remote location with a video and encounter a suspicious scene, there is no clear still image data at that time,
There is a problem that the same moving image data can be viewed again only by throwing or enlarging it again, and the obtained image is coarse and cannot be made clear.

[0005]

SUMMARY OF THE INVENTION An object of the present invention is to solve the conventional problem. Even when image data, for example, monitoring data of a state at a remote place is transmitted and received via a premises PHS, LAN, or the like, It is an object of the present invention to provide an image data conversion communication system capable of monitoring a moving image and, if necessary, viewing a clear still image.

[0006]

According to the present invention, there is provided an image data conversion communication system comprising an image pickup device, a display device, a small image data conversion transmission device, a small image data conversion reception device, and a private network. The data conversion transmission device includes a decoder unit for converting an input video signal into a digital image, an encoder unit for converting a digital image into an output video signal, and a CODEC for compressing and expanding a digital image.
Unit, a communication unit, an image recording unit, and a device control unit, and the like,
And the decoder, encoder and CODEC
A CODEC unit comprising: a moving image compressing unit for compressing the entire continuous image data; and a still image compressing / expanding unit for compressing and expanding one image data. It is an image data conversion communication system.

Further, according to the present invention, in the small-sized image data conversion / transmission apparatus, the compressed still image compressed image data recorded in the image recording section is expanded by the still image compression / expansion section, and the digital image data obtained by expansion is obtained. Is an image data conversion communication system for compressing and transmitting the image data in a moving image compression unit.

Further, the present invention provides an image pickup device, a display device,
In the image data conversion communication system consisting of a small image data conversion transmission device, a small image data conversion reception device, and a private network, the small image data conversion reception device includes:
An encoder for converting a digital image into an output video signal, a CODEC for expanding the digital image, a communication unit,
An image recording unit, a device control unit, etc., and a bus switching unit for switching connection of a bus connecting the encoder unit and the CODEC unit.
The ODEC unit is an image data conversion communication system including a moving image expanding unit that expands continuous image data as a whole and a still image expanding unit that expands one image data.

Further, in the present invention, the small-size image data conversion receiving apparatus may further comprise: expanding the received image data in which the still image compression and the moving image compression are mixed in the still image compression data by the still image expansion unit; Is an image data conversion communication system in which the video data is expanded by a moving image expansion unit.

The present invention is also directed to a small-sized image data conversion transmitting apparatus and a small-sized image data converting receiving and transmitting apparatus, both of which include a decoder for converting an input video signal into a digital image and an encoder for converting a digital image into an output video signal. Unit, a CODEC unit that compresses and decompresses digital images,
A communication unit, an image recording unit, a device control unit, and the like, and the decoder unit, the encoder unit, and the COD.
In addition to a bus switching unit for switching connection of a bus connecting the EC unit, the CODEC unit includes a moving image compression / expansion unit for compressing and expanding continuous image data as a whole, and a still image compression / expansion for compressing and expanding one image data. This is an image data conversion communication system which is a small image data conversion communication device including a communication unit.

In the present invention, the small-sized image data conversion communication device is provided by the H.264 standard. A moving image compression / decompression unit composed of H.263 CODEC, a still image compression / decompression unit composed of JPEG CODEC, a decoder unit composed of an NTSC decoder, and NTS
An image data conversion communication system including an encoder unit including a C encoder.

Further, according to the present invention, there is provided the small-sized image data conversion communication device, wherein a plurality of decoder units used in parallel;
An image data conversion communication system including an encoder unit or a still image compression / decompression unit.

Further, in the present invention, the still image compression / expansion unit includes an image data conversion unit comprising a first still image compression / expansion unit for expanding compressed image data and a second still image compression / expansion unit for compressing input image data. It is a communication system.

The present invention is the image data conversion communication system, wherein the communication section is a multiplex communication section for multiplexing or demultiplexing.

Further, the present invention is the image data conversion communication system, wherein the private communication network is a private PHS network or a LAN network.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described. An embodiment of an image data conversion communication system according to the present invention will be described with reference to FIGS. FIG. 1 is an explanatory diagram of the image data conversion communication system according to the embodiment. FIG.
FIG. 2 is an explanatory diagram of an example of a small image data conversion transmission device. FIG. 3 is an explanatory diagram of an example of the small image data conversion receiving device. FIG. 4 is an explanatory diagram of an operation example 1A of the small image data conversion / transmission device. FIG. 5 is an explanatory diagram of an operation example 1B of the small image data conversion receiving device. FIG. 6 is an explanatory diagram of an operation example 2A of the small image data conversion / transmission device. FIG.
FIG. 4 is an explanatory diagram of an operation example 3A of the small image data conversion / transmission device. FIG. 8 is an explanatory diagram of an operation example 4A of the small image data conversion / transmission device. FIG. 9 is an explanatory diagram of an operation example 5A of the small image data conversion / transmission device. FIG. 10 is an explanatory diagram of an operation example 6A of the small image data conversion / transmission device. FIG.
FIG. 1 is an explanatory diagram of an operation example 7A of the small image data conversion / transmission device. FIG. 12 is an explanatory diagram of an operation example 8B of the small image data conversion receiving device.

An embodiment will be described. As shown in FIG. 1, the image data conversion communication system according to the present embodiment includes an imaging device 1,
It comprises a small image data conversion transmitting device 2, a private telephone network 3, a small image data conversion receiving device 4, and a display device 5.

The image pickup apparatus 1 used in the image data conversion communication system of this embodiment is, for example, a camera apparatus,
The monitoring image of the state of the installed place is converted into a video input signal. A commonly used imaging device can be used.

A small image data conversion transmitting apparatus 2 used in the image data conversion communication system of the present embodiment converts a video input signal into compressed transmission data, and transmits the small image data conversion receiving apparatus via a private telephone network 3. Send to 4. An example of the small image data conversion transmission device 2 will be described with reference to FIG. This small image data conversion communication device 2 is NT
SC decoder 21, NTSC encoder 22, bus switching unit 23, CODEC unit, second bus unit 26, image recording unit 2
7, a multiplex communication unit 28 and a device control unit 29.
The CODEC section is based on H.264. 263 CODEC24 and JPE
G CODEC25.

The NTSC decoder 21 converts a video input signal into an ITU-R BT. 601 is converted into digital input image data. To convert NTSC video signals,
It uses the "NTSC decoder"
A "PAL decoder" is used when converting the video signal of the system. ITU-R BT. 601 is an ITU recommendation on a digital image format. 2
This is required as an image format handled by 63CODEC and JPEG CODEC. NTSC
The decoder 21 is implemented as an LSI. A plurality of NTSC decoders 21 can be used in parallel.

The NTSC encoder 22 converts digital output image data into a video output signal. When connected to the monitor device on the transmission side, the video can be visualized. N
An "NTSC encoder" is used to convert to a TSC video signal. When converting a PAL video signal, a “PAL encoder” is used. NTS
The C encoder 22 is implemented as an LSI. A plurality of NTSC encoders 22 can be used in parallel.

The bus switching section 23 switches the flow of digital image data. NTSC decoder 21, NTSC encoder 22, H.264. 263 CODEC24 and JPEG
The connection between the CODECs 25 can be changed. It is composed of a combination of digital signal selectors. The bus width used is a 16-bit width or an 8-bit width. NT
SC decoder 21 to NTSC encoder 22; 2
Switch the flow of input image data to 63CODEC24 or JPEG CODEC5, and
DEC 25 to NTSC encoder 22 or H.264. 263
The flow of the reproduced image data obtained by expanding the JPEG compressed image data to the CODEC 24 is switched.

H. The 263 CODEC 24 performs a compression operation for compressing continuous image data as a whole. During the compression operation, the ITU-R BT. The H.601 digital image data is converted to an H.264 image. 263 compressed image data. Bus switching unit 23
ITU-R BT. The H.601 digital image data is converted to an H.264 image. H.263 compression. The obtained compressed image data is referred to as “H.263 compressed image data”. H. 263
The image compression method is a moving image compression method that efficiently compresses continuous image data as a whole by using redundancy between consecutive images. H. The H.263 image compression method is based on ITU-
TH. 324 is an adopted image compression method. H. The 263 CODEC 24 is implemented as an LSI. H. The 263 CODEC 24 switches between a compression operation and an expansion operation under the control of the device control unit 29. A CODEC that can perform a compression operation and a decompression operation or that can be performed in parallel can also be employed.

The JPEG CODEC 25 performs a compression operation and a decompression operation. During the compression operation, the ITU-R BT.
601 converts the digital image data into JPEG compressed image data. ITU-RB obtained from the bus switching unit 23
T. 601 digital image data is compressed by the JPEG method. The obtained compressed image data is referred to as “JPEG compressed image data”. The JPEG image compression method is a compression method for still images that compresses using the redundancy in one image. The JPEG image compression method is employed in electronic still cameras and the like. During the decompression operation, the JPEG compressed image data is transferred to the ITU-R BT. 601 is converted into digital image data. JPEG CODEC 25 is implemented as an LSI. The JPEG CODEC 25 switches between a compression operation and a decompression operation under the control of the device control unit 29. CODE capable of executing compression and decompression operations in parallel
C may be adopted.

The second bus unit 26 switches the flow of digital image data. The connection between the JPEG CODEC 25, the image recording unit 27, and the multiplex communication unit 28 can be changed. It is composed of a combination of digital signal selectors. The bus width used is a 16-bit width or an 8-bit width. JPEG CODEC 25 to image recording unit 26
To the multiplex communication unit 28 from the JPEG CODEC 25,
The flow of the JPEG compressed image data is switched from the image recording unit 27 to the JPEG CODEC 25 and from the image recording unit 27 to the multiplex communication unit 28.

The image recording section 27 is a memory. Under the control of the device control unit 29, the JPEG compressed image data is recorded, and the previously recorded JPEG compressed image data recorded previously is output. When the image recording unit 27 is configured by an 8 MByte memory, 300 JPEG compressed images can be recorded. The switching of the second bus unit 26 connects to the JPEG CODEC 25 and the multiplex communication unit 28.

The multiplex communication unit 28 includes a microcomputer system and a modem, and can transmit a plurality of types of image data simultaneously and in parallel. H. H.324 adopted in the H.324 terminal 223 or H.R. Multiplexing and demultiplexing can be performed using the H.245 protocol. Transmission is
Performed after multiplexing digital signals. Demultiplexing is performed on the received digital signal. H. The H.263 compressed image data and the JPEG compressed image data are multiplexed. In this embodiment, image communication is used. However, any digital signal (= information) that can be handled in the multiplex communication unit 28 in the same way as compressed image data, such as compressed voice and data, can be multiplexed and communicated. The modem converts a digital signal into an electric signal optimal for a communication path, and performs communication with a small-sized image data conversion receiving device 4 as a partner terminal. When a control signal from the small image data conversion receiving device 4 is received,
Output to the device control unit 29.

The device control unit 29 is composed of a microcomputer system and controls the operation of the entire small image data conversion communication device 2. By controlling the bus switching unit 23, the ITU-R 60
1. Control the flow of digital images. H. 263 COD
The compression function of the EC 24 is selected. H. 263CODE
Activate C24. Select the compression function and decompression function of JPEG CODEC25. JPEG CODEC2
5 is started. The multiplex communication unit 28 is controlled to start and end communication with the small-size image data conversion / reception device 4 as the partner terminal. Also, the second bus unit 26 is controlled to
Controls the flow of compressed image data. The control operation can also be performed by a control signal from the small image data conversion receiving device 4.

The private communication network 3 used in the image data conversion communication system of this embodiment is, for example, a private PHS.
(Simplified mobile telephone network), LAN (local information communication network), etc., and separately installed small image data conversion and transmission device 2
And the small image data conversion receiving device 4 are connected.

The small image data conversion receiving device 4 used in the image data conversion communication system of the present embodiment receives the compressed transmission data from the small image data conversion transmitting device 2 via the private telephone network 3 and decompresses it. And converts it to a video output signal. The small image data conversion receiving device 4 is the same as the small image data conversion transmitting device 2, and an example thereof is an NTSC decoder 41, an NTSC encoder 42, a bus switching unit 43, a CODEC unit, as shown in FIG. 2 bus section 4
6. Image recording unit 47, multiplex communication unit 48, device control unit 49
Is provided. The CODEC section is based on H.264. 263CODE
It consists of C44 and JPEG CODEC45.

The NTSC decoder 41 is used when receiving image data on the receiving device side. Usually, they are not used because they are not needed, so they do not have to be provided.

The NTSC encoder 42 converts digital output image data into a video output signal. When connected to the display device 5, images can be visualized. "NTSC encoder" to convert to NTSC video signal
You are using When converting a PAL video signal, a “PAL encoder” is used. The NTSC encoder 42 is implemented as an LSI. A plurality of NTSC encoders 42 can be used in parallel.

The bus switching unit 43 switches the flow of digital image data. NTSC encoder 42; 26
The connection between 3CODEC44 and JPEG CODEC45 can be changed. It is composed of a combination of digital signal selectors. The bus width used is 16 bits
Width or 8-bit width. JPEG CODEC 45 to NTSC encoder 42 or H.264. 263 CODEC4
4, the flow of the reproduced image data obtained by expanding the JPEG compressed image data is switched.

H. The 263 CODEC 44 performs a decompression operation. At the time of the decompression operation, the H.264 obtained from the communication unit 48 is used. 26
3 decompresses the compressed image data to ITU-R BT. 601
Convert to digital image data. H. 263CODE
C44 is an LSI. H. 263 CODEC
Reference numeral 44 selects the decompression operation under the control of the device control unit 49. A CODEC that can perform a compression operation and a decompression operation or that can be performed in parallel can also be employed.

The JPEG CODEC 45 performs a decompression operation. During the decompression operation, the JPEG obtained from the communication unit 48 is used.
The compressed image data is decompressed to ITU-R BT. 601 is converted into digital image data. JPEG CODEC
Reference numeral 45 denotes an LSI. JPEG CODEC4
5 selects the decompression operation under the control of the device control unit 49. A CODEC that can execute the compression operation and the decompression operation in parallel or that can execute in parallel can also be adopted.

The second bus unit 46 switches the flow of digital image data. The connection between the JPEG CODEC 45, the image recording unit 47, and the multiplex communication unit 48 can be changed. It is composed of a combination of digital signal selectors. The bus width used is a 16-bit width or an 8-bit width. The multiplex communication unit 48 outputs 263 CODEC44,
H. JPEG CODEC 45, to the image recording unit 46, from the image recording unit 47 to the JPEG CODEC 45, 263
The flow of the compressed image data and the flow of the JPEG compressed image data are switched.

The image recording section 47 is a memory. Under the control of the device control section 49, JPEG compressed image data is recorded, and the previously recorded JPEG compressed image data recorded is output. If the image recording unit 47 is configured by an 8 MByte memory, 300 JPEG compressed images can be recorded. The switching of the second bus unit 46 connects to the JPEG CODEC 45 and the multiplex communication unit 48.

The multiplex communication section 48 includes a microcomputer system and a modem, and can receive a plurality of types of image data simultaneously and in parallel. H. H.324 adopted in the H.324 terminal 223 or H.R. Demultiplexing can be performed using the H.245 protocol. Demultiplexing is performed on the received digital signal. H. The H.263 compressed image data and the JPEG compressed image data are demultiplexed. In this embodiment, image communication is used. However, if the digital signal (= information) such as compressed voice and data can be handled in the multiplex communication unit 48 in the same manner as compressed image data, it can be received and demultiplexed. It is common to exchange control data promised between a transmitting side and a receiving side and remotely control settings in the apparatus, and a multiplexed data communication path may be used for such a purpose. The modem converts a digital signal into an electric signal optimal for a communication path, and performs communication with a small-sized image data conversion / transmission device 2 as a partner terminal. In addition, a control signal or the like to the small-sized image data conversion / transmission device 2 can be transmitted.

The device control section 49 is composed of a microcomputer system, and controls the operation of the entire small image data conversion receiving device 4. By controlling the bus switching unit 43, the ITU-R 60
1. Control the flow of digital images. H. 263 COD
The extension function of EC44 is selected. H. 263CODE
Activate C44. Select the compression function and decompression function of JPEG CODEC45. JPEG CODEC4
5 is started. The multiplex communication unit 48 is controlled to start and end communication with the small-sized image data conversion / transmission device 2 as the partner terminal. Further, the second bus unit 46 is controlled to
Controls the flow of compressed image data. In addition, a control signal to the small-sized image data conversion transmitting device 2 can be output. If a program is given to the microcomputer system so that the control is performed when the control data is received, the control performed by the device control unit can be controlled from a remote place.

The display device 5 used in the image data conversion communication system of this embodiment is, for example, a monitor device,
The video output signal is converted into a monitor image. A commonly used display device can be used.

According to the image data conversion communication system of this embodiment, a monitoring image at a remote place is converted into a video input signal by the imaging device 1. The video input signal is converted into compressed image data by the small image data conversion transmitting device 2 and transmitted to the small image data conversion receiving device 4 via the private communication network 3. The compressed image data received by the small image data conversion receiving device 4 is decompressed and converted into a video output signal. The video output signal is converted into a monitor image, and a monitor image can be obtained on the display device 5. As described above, a monitoring image of a remote place can be obtained by the image data conversion communication system of the present embodiment.

The operation examples 1A to 8B of the image data conversion communication system of this embodiment will be described with reference to the drawings. As an example of the present system, a combination of operation examples 1A and 1B will be described. The transmitting device 2 and the receiving device 4 can each be changed to another operation example. The operation examples 1A to 7A are examples on the transmission device 2 side, and the operation examples 1B and 8B are examples on the reception device 4 side, which will be described respectively. As an operation example of the present system, one of the operation examples 1A to 7A on the transmitting device 2 side and one of the operation examples 1B and 8B on the receiving device 4 side are combined. In the operation examples 6A, 7A, and 8B, the small image data conversion / transmission device 2 or the small image data conversion / transmission
SC decoder 21, NTSC encoder 42 or JPE
A plurality of G codecs 25 are provided. Hereinafter, transmission and reception of image data will be mainly described.

An operation example 1 of the image data conversion communication system of this embodiment will be described with reference to FIGS. The operation example 1 is a combination of the operation example 1A on the transmission device 2 side and the operation example 1B on the reception device 4 side. FIG. 4 is used for the operation example 1A on the transmitting device 2 side, and FIG. 5 is used for the operation example 1B on the receiving device 4 side. First, an operation example 1A will be described with reference to FIG. In the small-sized image data conversion / transmission device 2, the bus switching unit 23 transmits the NTSC decoder 21 to the NTSC encoder 22, 263 COD
Connect to EC24 and JPEG CODEC25. The second bus unit 26 connects the JPEG CODEC 25 to the image recording unit 27, and connects the image recording unit 27 to the multiplex communication unit 28. The NTSC decoder 21 converts a video input signal into input image data. NTSC encoder 2
2 converts the input image data into a video output signal. H.
263 CODEC24 and JPEG CODEC25
Indicates that the input image data is Compressed to H.263 compressed image data and JPEG compressed image data. The image recording unit 27 records JPEG compressed image data,
The previously recorded JPEG compressed image data recorded is output.
The multiplex communication unit 28 has the H.264 communication function. The H.263 compressed image data and the recorded JPEG compressed image data are multiplexed and transmitted to the small-sized image data conversion receiving device 4 as the partner terminal via the private communication network 3. Thereby, the video input signal is transmitted by the transmitting device 2 side.
H. 263 compressed image data.
It is recorded as EG compressed image data and directly monitored as a video output signal. The recorded JPEG compressed image data is transmitted.

Next, an operation example 1B in the small image data conversion receiving device 4 will be described with reference to FIG. In the small image data conversion receiving device 4, the bus switching unit 43
Is H. 263 CODEC44 or JPEG CODE
C45 is connected to the NTSC encoder 42. The second bus unit 46 transmits the multiplex communication unit 48 to the JPEG CODEC 4
5 and the image recording unit 47. The multiplex communication unit 48
H. H.263 compressed image data and JPEG compressed image data are received from the small-sized image data conversion / transmission device 2 as the partner terminal via the private communication network 3. Demultiplexed into 263 compressed image data and JPEG compressed image data. H. 26
3CODEC44 is H.264. The H.263 compressed image data is decompressed and reproduced. 263 image data. JPEG CO
The DEC 45 decompresses the JPEG compressed image data and sets it as reproduced JPEG image data. The image recording unit 47 is a JPE
The G compressed image data is recorded. NTSC encoder 42
Is the reproduction H. 263 image data or reproduced JPEG image data is converted into a video output signal. NTSC decoder 41
Does not work. As a result, the multiplexed H.264 / H.264. 263
The compressed image data and / or JPEG compressed image data are demultiplexed, decompressed, and monitored as video output signals on the receiving device 4 side. Also, JPEG compressed image data is recorded.

According to the operation example 1 (operation examples 1A and 1B),
The video input signal is transmitted by the transmitting apparatus 2 to the H.264 signal. The H.263 compressed image data and the recorded JPEG compressed image data are multiplexed and transmitted.
263 compressed image data and JPEG compressed image data
Demultiplexed, decompressed and monitored as a video output signal. The JPEG compressed image data is recorded on the transmitting device 2 side and the receiving device 4 side. The video input signal is also directly monitored as a video output signal on the transmission device 2 side.

Operation example 2A will be described with reference to FIG. In the small-sized image data conversion / transmission device 2, the bus switching unit 23 transmits the NTSC decoder 21 to the NTSC encoder 22, 263 CODEC24 and JPEG CO
Connect to DEC25. The second bus unit 26 is a JPEG
The CODEC 25 is connected to the image recording unit 27 and the multiplex communication unit 28.
Connect to The NTSC decoder 21 converts a video input signal into input image data. NTSC encoder 22
Converts input image data into a video output signal. H. 2
The 63CODEC 24 converts the input image data into H.63 data. 263 compressed image data. JPEG CODEC25
Compresses input image data into JPEG compressed image data. The image recording unit 27 records JPEG compressed image data. The multiplex communication unit 28 has the H.264 communication function. 263 compressed data and J
The PEG-compressed image data is multiplexed and transmitted to the small-sized image data conversion / reception device 4 as the partner terminal via the private network 3. Thereby, the video input signal is transmitted by the transmitting device 2 side.
H. It is transmitted as H.263 compressed image data and JPEG compressed image data, recorded as JPEG compressed image data, and directly monitored as a video output signal.

Operation example 3A will be described with reference to FIG. In the small image data conversion / transmission device 2, the bus switching unit 23 sets the NTSC decoder 21 to H.264. 263CODE
C24 and connect NTSC encoder 22 to JP
Connect to EG CODEC 25. The second bus section 26
The image recording unit 27 is connected to the JPEG CODEC 25 and the multiplex communication unit 28. The NTSC decoder 21 converts a video input signal into input image data. The NTSC encoder 22 converts the reproduced image data into a video output signal. H. The H.263 CODEC 24 converts the input image data to H.264. 263 compressed image data. JPEG CO
The DEC 25 expands the recorded JPEG compressed image data into reproduced image data. The image recording unit 27 outputs the recorded JPEG compressed image data recorded before. The multiplex communication unit 28 has the H.264 communication function. The H.263 compressed image data and the recorded JPEG compressed image data are multiplexed and transmitted to the small-sized image data conversion receiving device 4 as the partner terminal via the private communication network 3. As a result, the video input signal is transmitted to the transmission device 2 by the H.264 signal. 263
It is transmitted as compressed image data. The recorded JPEG compressed image data is transmitted, decompressed into reproduced image data, and monitored as a video output signal.

Operation example 4A will be described with reference to FIG. In the small-sized image data conversion / transmission device 2, the bus switching unit 23 converts the JPEG CODEC 25 into the NTSC encoder 22 and the H.264 codec. 263 CODEC24.
The second bus unit 26 converts the image recording unit 27 into a JPEG COD
Connect to EC25. The NTSC decoder 21 converts a video input signal into input image data. The NTSC encoder 22 converts the reproduced image data into a video output signal.
H. The H.263 CODEC 24 converts the reproduced image data to H.264. 2
63 compressed image data. JPEG CODEC
Numeral 25 decompresses the recorded JPEG compressed image coder into reproduced image data. The image recording unit 27 outputs the recorded JPEG compressed image data recorded before. Multiplex communication unit 28
Is H. The H.263 compressed image data is transmitted to the small-size image data conversion / reception device 4 as the partner terminal via the private communication network 3. The NTSC decoder 21 is not functioning. As a result, the recorded JPEG compressed image data is expanded into reproduced image data on the transmission device 2 side. 263 compressed image data is transmitted and monitored as a video output signal.

The operation example 5A will be described with reference to FIG. In the small image data conversion / transmission device 2, the bus switching unit 23 connects the NTSC decoder 21 to the NTSC encoder 22, and sets the JPEG CODEC 25 to H.264.
263 CODEC24. The second bus section 26
The image data recording unit 28 is connected to the JPEG CODEC 25. The NTSC decoder 21 converts a video input signal into input image data. The NTSC encoder 22 converts input image data into a video output signal. H. 263C
The ODEC 24 converts the reproduced image data into H.264 data. 263 compressed image data. The JPEG CODEC 25 decompresses the recorded JPEG compressed image data into reproduced image data. The image recording unit 27 outputs the recorded JPEG compressed image data recorded before. The multiplex communication unit 28 has the H.264 communication function. 263
The compressed image data is transmitted to the small-sized image data conversion receiving device 4 as the partner terminal via the private network 3. Thus, the video input signal is monitored as a video output signal on the transmission device 2 side. The recorded JPEG compressed image data is expanded into reproduced image data. 263 compressed image data is transmitted.

Operation example 6A will be described with reference to FIG. In the small image data conversion / transmission device 2, the bus switching unit 23 connects the NTSC decoder 21 to the NTSC encoder 22 and the second JPEG CODEC 25b,
Then, the first JPEG CODEC 25a is set to H.264. 263
Connect to CODEC 24. The second bus unit 26 connects the image recording unit 27 to the second JPEG CODEC 25b,
Then, the first JPEG CODEC 25a is transmitted to the multiplex communication unit 2
Connect to 8. The NTSC decoder 21 converts a video input signal into input image data. NTSC encoder 22
Converts input image data into a video output signal. H. 2
The 63CODEC 24 converts the reproduced image data into H.63 data. 263 compressed image data. 1st JPEG CODEC25a
Expands the recorded JPEG compressed image data. 2nd JP
EG CODEC 25b converts input image data into JPEG
Compress to compressed image data. The image recording unit 27
It outputs PEG compressed image data and records JPEG compressed image data. The multiplex communication unit 28 has the H.264 communication function. 26
(3) transmitting the compressed data to the small-sized image data conversion / reception device 4 as the partner terminal via the private communication network 3; This allows
The video input signal is recorded as JPEG compressed image data on the transmission device 2 side, and is directly monitored as a video output signal. The recorded JPEG compressed image data is decompressed into reproduced image data. 263 compressed image data is transmitted.

In the operation example 6A, the small image data conversion / transmission device 2 has two JPEG CODECs 25a and 25b. Therefore, when compared with the operation example 6A,
The recorded JPEG compressed image data is decompressed into reproduced image data. The difference is that input image data during transmission while being compressed to 263 compressed image data is recorded as JPEG compressed image data. H. Since the transmission time of the H.263 compressed image data is short, the reduced amount of the recorded JPEG compressed image data is larger than the new recording amount, and eventually the new JPEG compressed image data does not include the new recording amount. Therefore, it works in parallel until the transmission catches up with the record,
When the transmission of the PEG compressed image data is completed, the operation is performed in the same manner as in Operation Example 3. In operation example 6, recording J
The input image data cannot be transmitted until the transmission of the PEG compressed image data is completed. If the input image data is used, for example, for monitoring the status of a site, a blank time is generated in the monitoring. In the operation example 7A, the input image data until the transmission of the recorded JPEG compressed image data is completed can be recorded in the image recording unit 27 and transmitted.
On the side, the status of the site can be monitored with a time delay.

Operation example 7A will be described with reference to FIG. In the small image data conversion / transmission device 2, the bus switching unit 23 sets the first NTSC decoder 21a to H.264. 263
The second NTSC decoder 21b is connected to the JPEG CODEC 25. Further, the NTSC encoder 22 is connected to the first or second NTSC decoder 21a, 21b. The second bus section 26
The JPEG CODEC 25 is connected to the image recording unit 27 and the multiplex communication unit 28. The first and second NTSC decoders 21a and 21b convert the first and second video input signals into first and second input image data, respectively. The NTSC encoder 22 converts the first or second input image data into a video output signal. H. 263 CODEC 24 is the first
When the input image data is 263 compressed image data. The JPEG CODEC 25 compresses the second input image data into JPEG compressed image data. Image recording unit 27
Records JPEG compressed image data. Multiplex communication unit 4
8 is H. The H.263 compressed image data and the JPEG compressed image data are transmitted to the small-sized image data conversion receiving device 4 as the partner terminal via the private network 3. Thereby, the first
The video input signal is transmitted by the transmitting apparatus 2 to the H.264 signal. 263 compressed image data. The second video input signal is JPE
It is recorded and transmitted as G compressed image data. The first video input signal or the second video input signal is directly monitored as a video output signal.

In the operation example 7A, the small image data conversion / transmission device 2 has two NTSC decoders 21a and 21b. 263 CODEC24 and JPEG CO
The DEC 25 can compress different images as sources and transmit the obtained compressed image data.
As an application, for example, The H.263 compressed image data can be used simultaneously with the observation of the dynamics of the party, and the JPEG compressed image data can be used simultaneously with the identification card confirmation.

An operation example 8B will be described with reference to FIG. In the small-sized image data conversion receiving device 4, the bus switching unit 43 includes 263CODEC44 to 1st NTSC
Connected to the encoder 42a, and the JPEG COD
The EC 45 is connected to the second NTSC encoder 42b.
The second bus unit 46 transmits the multiplex communication unit 48 to the JPEG CO
It is connected to the DEC 45 and the image recording unit 47. The multiplex communication unit 48 is based on H.264. H.263 compressed image data and JPEG compressed image data are received from the small-sized image data conversion / transmission device 2 as the partner terminal via the private communication network 3. Demultiplexed into 263 compressed image data and JPEG compressed image data.
H. H.263 CODEC 44 is an H.264 standard. The H.263 compressed image data is decompressed and reproduced. 263 image data. JPE
The G CODEC 45 decompresses the JPEG compressed image data and sets it as reproduced JPEG image data. Image recording unit 47
Records JPEG compressed image data. 1st NTSC
The encoder 42a controls the playback H.264. 263 image data
Convert to video output signal. Second NTSC encoder 42
b converts the reproduced JPEG image data into a second video output signal. The NTSC decoder 41 does not function. As a result, the receiving apparatus 4 side receives and demultiplexes H.264. 263
The compressed image data is decompressed and monitored as a first video output signal. The received and demultiplexed JPEG compressed image data is monitored and recorded as a second video output signal.

In the operation example 9B, the NTSC decoders 42a and 42b are 2
H. is implemented. The H.263 CODEC 44 and the JPEG CODEC 45 can transmit compressed image data using different images as sources.
As an application, The H.263 compressed image data can be used simultaneously with the observation of the dynamics of the party, and the JPEG compressed image data can be used simultaneously with the identification card confirmation.

As described above, according to the image data conversion communication system of the present embodiment, H.264 is used. JPEG compressed image data can be recorded at the same time while monitoring the current status from the H.263 compressed image data. Therefore, it is possible to obtain past record monitoring data while monitoring what is happening now.

Further, H. If you are monitoring the current situation using 263 compressed image data and are suspicious,
PEG compressed image data can be obtained. The video obtained from JPEG compressed image data is better than H.264. Since a video closer to the original video is obtained than the video obtained from the H.263 compressed image data, it can be said that there is more video information.

J recorded in the image recording units 27 and 47
Although the PEG compressed image data is compressed to 1/10 or 1/30 of the original image, it is larger than the communication capacity. Therefore, for example, if all images of 300 frames are sent,
It takes time and may lose the alertness of remote monitoring. However, for surveillance applications, for example, there are many videos with fixed monitoring viewpoints, and it is easily predicted that the recorded still image is an image that hardly changes. When the recorded JPEG compressed image data is continuously reproduced, if it is compressed for a moving image, there is almost no change between the consecutive images. Therefore, the compression efficiency is improved by utilizing the redundancy between the consecutive images. When the data is compressed by the H.263 compression method, the data can be compressed to an information amount appropriate for the communication capacity. Therefore, if the communication capacity is about 64 kbps, 300 frames of images can be communicated in about 30 seconds. For example, if a JPEG compressed image is operated to be recorded every 1 s, about 5
The images of a minute can be listed in about 30 seconds, and the promptness is improved. For example, in a banknote inspection process, a printed banknote is bundled and turned vigorously, and the inspector detects a printing error by the afterimage effect. Similar to this process, the suspicious portion can be detected by the afterimage effect of the continuously transmitted video.

[0059]

According to the present invention, image data, for example, monitoring data of a remote location is compressed and decompressed to a PSTN or PTN.
It is possible to obtain an image data conversion communication system capable of monitoring a moving image when transmitting and receiving by HS or the like, and simultaneously viewing a clear still image if necessary.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram of an image data conversion communication system according to an embodiment.

FIG. 2 is an explanatory diagram of an example of a small image data conversion and transmission device.

FIG. 3 is an explanatory diagram of an example of a small image data conversion receiving device.

FIG. 4 is an explanatory diagram of an operation example 1A of the small image data conversion / transmission device.

FIG. 5 is an explanatory diagram of an operation example 1B of the small image data conversion receiving device.

FIG. 6 is an explanatory diagram of an operation example 2A of the small image data conversion / transmission device.

FIG. 7 is an explanatory diagram of an operation example 3A of the small image data conversion / transmission device.

FIG. 8 is an explanatory diagram of an operation example 4A of the small image data conversion / transmission device.

FIG. 9 is an explanatory diagram of an operation example 5A of the small image data conversion / transmission device.

FIG. 10 is an explanatory diagram of an operation example 6A of the small image data conversion / transmission device.

FIG. 11 is an explanatory diagram of an operation example 7A of the small image data conversion / transmission device.

FIG. 12 is an explanatory diagram of an operation example 8B of the small image data conversion receiving device.

FIG. 13 is an explanatory diagram of a conventional small image data conversion communication device.

[Explanation of symbols]

 Reference Signs List 1 imaging device 2 small-sized image data conversion receiving device 21, 21a, 21b NTSC decoder 22, 22a, 22b NTSC encoder 23 bus switching unit 24 H. 263 CODEC 25 JPEG CODEC 26 Second bus unit 27 Image recording unit 28 Multiplex communication unit 29 Device control unit 3 Private communication network 4 Small image data conversion receiving device 41, 41a, 41b NTSC decoder 42, 42a, 42b NTSC encoder 43 Bus switching unit 44H. 263 CODEC 45 JPEG CODEC 46 Second bus unit 47 Image recording unit 48 Multiplex communication unit 49 Device control unit 5 Display device

 ──────────────────────────────────────────────────続 き Continued on the front page F-term (reference)

Claims (10)

[Claims] 1. An image data conversion communication system comprising: an imaging device, a display device, a small image data conversion transmission device, a small image data conversion reception device, and a private communication network. A decoder unit for converting a signal into a digital image, an encoder unit for converting a digital image into an output video signal, a CODEC unit for compressing and expanding a digital image, a communication unit, an image recording unit,
And a device control unit, and the like, and the decoder unit,
A bus switching unit that switches connection of a bus that connects the encoder unit and the CODEC unit;
The image data conversion communication system, characterized in that the unit comprises a moving image compression unit for compressing the continuous image data as a whole and a still image compression / expansion unit for compressing and expanding one image data. 2. The image data conversion communication system according to claim 1, wherein the small image data conversion and transmission device expands the recorded still image compressed image data recorded in the image recording unit by a still image compression and expansion unit. An image data conversion communication system, wherein digital image data obtained by decompression is compressed by a moving image compression unit and transmitted. 3. An image data conversion communication system comprising: an imaging device, a display device, a small image data conversion transmission device, a small image data conversion reception device, and a private communication network. An encoder unit for converting the image data into an output video signal, a CODEC unit for expanding a digital image, a communication unit, an image recording unit, a device control unit, and the like, and a bus connection for connecting the encoder unit and the CODEC unit. Data conversion communication system, comprising: a bus switching unit for switching between image data, and the CODEC unit includes a moving image decompression unit for decompressing continuous image data as a whole and a still image decompression unit for decompressing one image data. . 4. The image data conversion communication system according to claim 3, wherein the small-size image data conversion receiving device converts the received image data mixed with the still image compression and the moving image compression into a still image compressed data by a still image decompression unit. An image data conversion communication system, which decompresses and decompresses moving image compression data by a moving image decompression unit. 5. The image data conversion communication system according to claim 1, wherein the small image data conversion transmission device and the small image data conversion reception transmission device both convert an input video signal into a digital image signal. A decoder unit for converting a digital image into an output video signal, a CODEC unit for compressing and expanding a digital image, a communication unit, an image recording unit, and a device control unit. And a bus switching unit for switching connection of a bus connecting the encoder unit and the CODEC unit. The CODEC unit includes a moving image compression / decompression unit for compressing and expanding continuous image data as a whole, and a video compression / decompression unit for compressing and expanding one image data. An image data conversion communication system, characterized in that it is a small image data conversion communication device comprising a Beam. 6. The image data conversion communication system according to claim 5, wherein: 263 COD
An image data conversion communication system comprising: a moving image compression / decompression unit including EC; a still image compression / decompression unit including JPEG CODEC; a decoder unit including an NTSC decoder; and an encoder unit including an NTSC encoder. 7. The image data conversion communication system according to claim 1, wherein said small-size image data conversion communication device comprises a plurality of decoder units, encoder units or stationary units used in parallel. An image data conversion communication system comprising an image compression / decompression unit. 8. The image data conversion communication system according to claim 7, wherein the still image compression / expansion unit expands the compressed image data and a second still image compression / expansion unit compresses the input image data. An image data conversion communication system, comprising: a decompression unit. 9. The image data conversion communication system according to claim 1, wherein said communication unit is a multiplex communication unit for multiplexing or demultiplexing. system. 10. The image data conversion communication system according to claim 1, wherein the private communication network is a private PHS network or a LAN network.