JPH0522720A - Picture codec and av meeting terminal - Google Patents

Abstract

PURPOSE:To simultaneously display a still picture and an animation on one screen. CONSTITUTION:An A/D converter(200) converts a picture signal into a digital value. Digitalized picture data is transmitted to a PinP processing part(205) as self picture data. An animation decoder(206) or a still picture decoder(207) decodes inputted picture data and transmits it to the PinP processing part(205). The PinP processing part (205) generates picture data generating a picture-in- picture screen from self picture data and decoded picture data so as to transmit it to a D/A converter(220). The D/A converter(220) converts received picture data into an analog signal and outputs it.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an AV meeting terminal for performing real-time communication of voice, moving images, etc. via a high speed digital communication network such as ISDN.

[0002]

2. Description of the Related Art As a conventional AV meeting terminal, a videophone device and a videoconference device are known.

[0003] These conventional AV meeting terminals enable a call using video by transmitting and displaying a still image and a moving image to each other.

As the techniques related to these, there are known techniques described in Japanese Patent Laid-Open No. 2-39790 and Japanese Patent Laid-Open No. 2-22989.

[0005]

A conventional AV meeting terminal has an A / D converter and a D / A converter for still images and moving images, respectively, and outputs from two D / A converters. The still image display and the moving image display on the display are switched by switching between the still image image signal and the moving image signal.

Alternatively, a still image and a moving image are simultaneously displayed by outputting the still image signal and the moving image signal to two different displays, respectively.

However, switching between the still image display and the moving image display is not preferable because the switching operation becomes complicated, and the dialogue with the communication partner does not go smoothly.

On the other hand, according to the method of displaying the still picture image signal and the moving picture image signal on two different displays, two displays are required and the terminal becomes large. Also,
When the user is looking at a still image, his or her line of sight moves greatly, and the line of sight with the communication partner shifts.

Therefore, an object of the present invention is to provide an AV meeting terminal capable of simultaneously displaying a still image and a moving image on one screen.

[0010]

To achieve the above object, the present invention provides an A / D converter for converting an input analog image signal into digital image data, and digital image data converted by the A / D converter. , For example, ISO standard JPE
The still image coder that outputs the encoded still image data by encoding according to the encoding rule that follows the G algorithm and the digital image data converted by the A / D converter are described in CCITT Recommendation H.264, for example. 261. A moving image coder that encodes and outputs encoded moving image data according to a coding rule according to H.261, and encoded moving image data output by a moving image coder and an encoded moving image output by a still image coder. A selector for selecting and outputting any one of the data, and a still image decoder for decoding the input encoded still image data into decoded still image data.
, A still picture decoder and a moving picture decoder for decoding input encoded moving picture data into decoded moving picture data, and decoded still picture data and a moving picture decoder decoded by the still picture decoder. Based on the decoded moving image data decoded by the decoder and the digital image data converted by the A / D converter, at least two of the decoded still image data, the decoded moving image data, and the digital image Picture
Image-generating picture-In-picture-Image generating picture-In-picture-Processing unit, Picture-
An image codec having a D / A converter for converting picture-in-picture-image data created by an in-picture-processing unit into an analog image signal and outputting the analog image signal.

[0011]

According to the image codec of the present invention, the picture-in-picture processing unit is configured to decode the decoded still image data decoded by the still image decoder and the decoded image data decoded by the moving image decoder. From the moving image data and the digital image data converted by the A / D converter, a picker-in-picture image for at least two image data of the decoded still image data, the decoded moving image data, and the digital image is generated. -In-picture-Create image data. Therefore, it is possible to display and output the image data obtained by decoding the still image data and the image data obtained by decoding the moving image decoder. Further, it suffices to provide one D / A converter for the still picture decoder and the moving picture recorder.

The selector selects one of the encoded moving image data output by the moving image coder and the encoded moving image data output by the still image coder in a time division manner and outputs it. The A / D converter is used for still image and video
It can be used in a time division manner for data.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an AV meeting terminal according to the present invention will be described below.

FIG. 1 shows the configuration of an AV meeting terminal according to this embodiment.

As shown in the figure, the AV player according to this embodiment is used.
The terminal is a camera 1, an LCD display 2, a dial function key-3, a VSW 4, an image code 5, a telephone control man-machine interface 6, a multipoint conversation control 7, a multimedia demultiplexing / inter-terminal signal control unit. 8, network interface / communication network control unit 9, D /
R10, VDT11, voice codec 12, ASW1
3, handsfree-14, handset 15, G3FAX
Interface 16, V11D / R17, RS422
D / R18, RS232C D / R19, data demultiplexing 20, communication interface matching 21, bus SW22,
It has communication ports 23 to 25, a control unit 26, peripheral device control interfaces 27 and 28, and a non-voltage contact 31.

As external input / output terminals, a video input / output interface 110 and an audio input / output interface 10 are provided.
9, microphone input 108, G3 FAX modular jack 107, V11RS422 multi-conner 106, RS
It has a 232C Connelter 105, a mouse jack 104, a conference operation unit Connerta 103, and a camera control / external device multi-connector 101.

The network interface / communication network control unit 9 is connected to a digital communication network via the D / R 10 and performs communication control and communication processing with the network such as establishment of a communication channel with a communication partner terminal. To do. The multimedia demultiplexing / inter-terminal signal control unit 8 performs various controls with the communication partner terminal. Further, the multimedia demultiplexing / inter-terminal signal control unit 8 separates, from the received communication frame, data types such as video data, audio data, data and control data, and various types. Data is multiplexed into the transmission communication frame. The video data is the network side interface data of the image codec 5, the audio data is the audio codec 12 and the network side interface data, and the data is the interface with the data demultiplexer 20. -Data. Further, the control data is transmitted / received to / from the control unit 26.

The data demultiplexing unit 20 is a communication frame received by the multimedia demultiplexing / terminal signal control unit 8.
The data separated from the inside of the system is further separated for each data type in accordance with the protocol established in advance with the transmission partner terminal.

Specifically, CCIT is used as a communication frame.
Recommendation H.T. Assuming the frame defined in 221
The multimedia demultiplexing / inter-terminal signal control unit 8 sends / receives BAS data in the frame to / from the control unit, and audio data to / from the voice codec 12 to transmit / receive CCI.
TT Recommendation H. Video data such as frames defined by H.261 is transmitted and received to and from the image codec 5, and data is transmitted and received to and from the data demultiplexing unit 20. In addition, H. When the MLP data is stored in the frame defined by 221, this MLP data is transmitted / received between either the control unit 26 or the data multiplexing unit 20 according to the control of the control unit 20.

Then, the data demultiplexing unit 20 sends the data to G3 in accordance with the protocol defined in advance as the transmission partner terminal.
Separated into FAX data, computer data, various control data, etc., and these are G3 FAX modular jack 1
07 and V11RS422 multi-conner 106, RS2
Send to 32C Connelta 105. On the contrary, G3 FAX
The data received from the modular jack 107, the V11RS422 multi-connerter 106, and the RS232C connelter 105 is multiplexed and sent to the multimedia demultiplexing / inter-terminal signal control unit 8.

The multipoint conversation control 7 carries out control necessary for holding and managing the multipoint video conference when the multipoint video conference is carried out. If a multipoint video conference is not held, only data relay will be performed. The VDT 11 is means for detecting station power supply.

The camera 1 captures an image and the LCD display 2 displays and outputs the image. The VSW 4 is a video switch for switching the connection between the camera 1, the LCD display 2, the video input / output interface 110, and the image codec. In the video input / output interface 110,
The video input / output of an external video input / output device can be connected.

The image codec encodes the image signal input via the VSW 4 and sends it to the multimedia demultiplexing / inter-terminal signal control unit 8 via the multipoint conversation control 8. Also, the multimedia demultiplexing / inter-terminal signal control unit 8 decodes the video data separated from the reception communication frame and outputs it via the VSW 4.

The handsfree 14 is a set of a handsfree microphone and a speaker. G3 FAX interface
It is a modular jack that can connect G3 FAX to the device 16. The audio input / output interface 109 can be connected to the audio input / output of an external audio input / output device. An external microphone can be connected to the microphone input 108.

The ASW 13 is an audio switch for switching the connection between the handsfree 14, the handset 15, the G3 FAX interface 16, the voice input / output interface 109, the microphone input 108 and the voice codec 12.

The voice codec 12 encodes the voice signal input via the ASW 4, and the multimedia demultiplexing / terminal signal control unit 8 via the multipoint conversation control 8.
Send to. Also, the multimedia demultiplexing / inter-terminal signal control unit 8 decodes the video data separated from the reception communication frame and outputs it via the ASW 13. In addition, the voice codec 12 receives V11 via the V11 D / R17.
It is connected to the RS422 Multi-Conner 106.

The dial function key-3 is a key for receiving an instruction from the user. The telephone control man-machine interface 6 responds to this key input with the ASW1
3 to control handsfree-14, handset 15, G3
The FAX interface 16, the voice input / output interface 109, the microphone input 108 and the voice codec 5 are connected. Further, the instruction by this key input is transmitted to the multipoint conversation control 7 via the telephone control man-machine interface 6. The multipoint conversation control 7 controls the multipoint video conference according to this instruction.

The G3FAX interface 16 is a G3F
G, which is an analog fax connected to the AX connector 107
3 If the transmission signal received from the FAX is handled as FAX data as audio data, it is sent to the audio codec 12 via the ASW 13, and if the FAX data is handled as data, the transmission signal is digitized and encoded. , Send to the data multiplexer. On the contrary, G3F
When the received data to the AX is received from the voice codec 12, it is sent to the G3 FAX modular jack as it is, and the received data to the G3 FAX is sent to the data demultiplexing unit 20.
When it is received, it is decoded, converted into an analog signal, and sent to the G3 FAX modular jack.

The RS232C connector is an RS232C interface and is a connector to which a computer, a word processor or an electronic blackboard can be connected. The RS232C connector is connected to the control unit 26 or the data demultiplexing unit 20 via the bus SW. Communication interface matching 21
Is for matching the data rate of the input / output data of the data demultiplexer 20 with the data rate of the input / output data of the RS232C interface. Communication ports 24, 25
Is a communication port for the RS232C interface used by the control unit 26.

V11RS422 multi-corner 106
Is a connector for connecting an external device with a V11 interface and an RS422 interface. In this embodiment, an example of connecting a conference unit will be described later.

The RS422 interface is connected to the control unit 26 via the bus SW. The communication port 23 is a communication port for the RS422 interface used by the control unit 26. The data demultiplexer 20 is connected to the V11 interface.

Peripheral device control interfaces 27 and 28 follow the instructions of the control unit and each unit in the AV terminal, the mouse connected to the mouse jack 104, and the conference connected to the conference controller connector 103. For controlling the operating device, and for controlling the camera / multi-connector for external equipment 10
An external device such as an external camera is controlled via 1.

The camera control / external device multi-connector 101 transmits the instruction of the control unit to the external device by a non-voltage contact.

The details of the image codec 5 will be described below.

FIG. 2 shows the structure of the image codec 5.

In the figure, 200 is an A / D converter, 201 is a moving picture coder, 201 is a still picture coder, 203 is a variable length coder, 204 is a BCH, 205 is a PinP processing section,
206 is a moving picture decoder, 220 is a D / A converter, and 207
Is a still picture decoder, 208 is a variable length decoder, 209 is BCH, 210, 211, 212, 213, 214, 2
Reference numeral 15 is a video switch.

As described above, in this embodiment, a still image and a moving image are handled, but the image signal digitization is performed by one A / D.
This is done by the converter 200. This is because a still image and a moving image are not normally transmitted at the same time due to the limitation of the transmission capacity of the communication path using the digital communication network. That is, normally
In order to quickly send a still image with a large amount of data to the communication partner terminal, the transmission of the moving image is stopped during the transmission of the still image.

Further, in the present embodiment, the PinP processing unit, which will be described in detail later, multiplexes and displays the received still image and moving image on the same screen to improve usability, and at the same time, this still image and moving image are displayed. Of the same screen,
One D / A converter is provided for converting the image data of both signals into analog signals by performing each signal before conversion into analog signals.

Next, the operation of the image codec will be described.

When the image signal is input via the VSW 4, the A / D converter 200 converts the image signal into a digital value. In this embodiment, an NTSC signal is assumed as the input image signal, but this is the same even if the signal complies with other standards such as PAL and RGB. The digitized image data self-portrait data is sent to the PinP processing 205.

Under the control of the peripheral device control interface 27, the video switches 210 and 211 convert the digitized image data into the moving image coder 201 or the moving image depending on whether the input image signal is a still image or a moving image. Still image coder-2
Send to any of 02.

The moving picture coder 201 converts the received image data into CCITT Recommendation H.264. DCT defined in H.261
It encodes by the coding rule by. Also, a still image coder-20
2 encodes the received image data according to a predetermined coding rule. When the variable length coder 203 receives the encoded image data from either the moving image coder 201 or the still image coder 202, the variable length coder 203 sends the received image data to the H.264 standard. Variable length coding is performed according to the variable length coding rule defined in H.261. The BCH 204 receives the variable-length coded image data from the variable-length coder 203 and then performs BC for error correction.
The H data is added and sent as video data to the multimedia demultiplexing / inter-terminal signal control unit 8 via the multipoint conversation control 7.

On the other hand, when the BCH 209 receives video data or still image data from the multimedia demultiplexing / inter-terminal signal control unit 8 via the multipoint conversation control 7, the BCH 209 checks the BCH data and performs error correction, The error-corrected video data or still image data is sent to the variable length decoder 208. Variable length decoder 2
08 receives the received image data in the H.264 format. Decoding is performed according to the variable length coding rule defined in H.261. Variable length decoder 208
The data decoded in (1) is sent to either the moving picture decoder 206 or the still picture decoder 207 via the video switch 215 depending on whether it is video data or still picture data. The movie decoder 206 is a variable length decoder.
When receiving the video data decoded by the D.D. Decoding is performed according to the coding rule defined in H.261. Further, when the still picture decoder 207 receives the video data decoded by the variable length decoder 208, the IS
Decoding is performed according to a predetermined coding rule, such as coding immediately following the O standard JPEG algorithm. The image data decoded by the moving picture decoder 206 or the still picture decoder 207 is Pi as the received moving picture data or the received still picture data.
It is sent to the nP processing unit 205.

The PinP processing unit 205, if necessary,
Using the self-image data sent from the A / D converter 200 and the image data decoded by the moving image decoder 206 or the still image decoder 207, PinP processing described later is performed, and the PinP-processed image data is obtained. D / A converter 2
Send to 20. The D / A converter 220 converts the received image data into an analog signal, and the video switch 4
Sent to.

This image signal is sent to the video switch 4
Is displayed and output on an LCD display or the like according to the operation of.

Next, details of the PinP processing unit 205 will be described.

FIG. 3 shows the configuration of the PinP processing unit 205.

In the figure, 301 is a self-portrait frame memory, 3
02 is a still image frame memory, 303 is a decoding frame memory, 305, 306 and 307 are MUXs, and 308 is
A parent screen address generation unit, 309 a child screen address generation unit, 310 a display screen timing control unit, 311 an MU
It is X.

Next, Pi performed by the PinP processing unit 205
The nP processing will be described with reference to FIG.

The PinP process is a process for generating a picture-in-picture-image from a plurality of images.
That is, as shown in FIG. 4, it is a process of multiplexing and outputting two pieces of image data so that different images are displayed and output in the parent screen area and the child screen area.

In this embodiment, there are three types of data: self-picture data received from the A / D converter 200, received still picture data received from the still picture decoder 207, and received moving picture data received from the moving picture decoder 206. Two pieces of image data are selected from the image data, and the two pieces of image data are multiplexed and output so as to be displayed and output in the parent screen area and the child screen area. In this way, 2 out of 3 image data of self-portrait data, received still image data and received moving image data
When one image data is selected and PinP processing is performed, there are six types of picture-in-picture-images that can be generated as shown in FIGS.

The PinP processing operation of the PinP processing unit 205 will be described.

The self-portrait frame memory 301 stores the sent self-portrait data. Still image frame memory 3
02 stores the received still image data. The moving picture frame memory stores the received moving picture data. The contents of each frame memory are updated at any time.

The parent screen address generation unit 308 generates an address for reading the image data in the display order from the frame memory that stores the image data displayed on the parent screen.
While the address generated by the parent screen address generation unit 308 is generating the address corresponding to the child screen area, the child screen address generation unit 309 stores image data displayed on the child screen in parallel with this. The address for reading the image data from the frame memory is displayed in the display order. The display timing control unit controls the address generation timing of the child screen address generation unit 309. Further, as shown in FIG. 4, the image displayed in the child screen area must be reduced. Therefore, the child screen address generation unit 309
Generates discrete addresses according to the reduction ratio, and
Pixels are thinned out from the memory and the image data is read out.

The address generated by the parent screen address generation unit 308 is a frame storing image data displayed on the parent screen by the MUXs 305, 306 and 307.
Given to the memory. In addition, the child screen address generation unit 3
The generated address of 09 is MUX 305, 306, 3
It is given to the frame memory storing the image data displayed on the child screen by 07.

The MUX 311 is a parent screen address generation unit 3
While the address generated by 08 generates the address corresponding to the child screen area, the image data read from the frame memory storing the image data displayed on the child screen is selected and output, In other cases, the image data read from the frame memory that stores the image data displayed on the main screen is selected and output. The display timing control unit controls the switching timing.

In the frame memories of the PinP processing unit 205, the moving picture coder 201, the still picture coder 202, the moving picture decoder 206, and the still picture decoder 207 are used for encoding and decoding. It may be shared with the frame memory used.

Next, the G3 FAX interface 16
Will be described in detail.

FIG. 5 shows the configuration of the G3 FAX interface 16.

In the figure, 501 is a hybrid, 502 is a root SW, 503 is a fax codec, and 504 is an FA.
X is an incoming / outgoing call control.

The FAX outgoing / incoming call control 504 is performed by the control unit 26 via the peripheral device control interface 27 to the G3F.
When notified of the reception of AX data, the ringer signal is sent to G3F.
It is applied to the AX modular jack (modular jack) 108. Further, the FAX outgoing / incoming call control 504 is a G3FA.
The off-hook or on-hook of the G3 FAX connected to the X modular jack 108 is detected and transmitted to the control unit 26 via the peripheral device control interface 27. If necessary, the contents of the dial ring of the G3FAX connected to the G3FAX modular jack 108 are transmitted to the control unit 26 via the peripheral device control interface 27.

The hybrid 501 is a G3 FAX modular jack half-duplex interface and a root SW.
Align with the front double interface on the side. Root S
The W 502 connects the hybrid 501 and the audio codec when the control unit 26 notifies the W 502 via the peripheral device control interface 27 that the G3 FAX data is to be handled as data. The resultant voice codec encodes the data transmitted by the connected G3 FAX, and sends it as audio data to the multimedia demultiplexing / inter-terminal signal control unit 8 via the multipoint conversation control 7.

On the other hand, if the control unit 26 notifies the G3 FAX data as audio data via the peripheral device control interface 27, the route SW
Connects the fax codec 503 and the hybrid 501. FAX codec 503 is connected to G3
The data transmitted by the FAX is encoded by the μ / A rule, ADPCM, etc., and sent as data to the multimedia demultiplexing / inter-terminal signal control unit 8 via the data demultiplexing 20.

As described above, according to this embodiment, the normal G. 3FAX, AV interface with the same interface
It can be used by connecting to a mobile terminal. Also,
In addition, G3 FAX data can be sent to FAX codec 50.
3 is used for encoding and handling as data, so that the voice codec 12 can be used even during communication by G3 FAX.
You can make a call using.

Next, the camera control / external device multi-connector 101 will be described.

The AV meeting terminal according to this embodiment is
An external camera, an external monitor, an external microphone external speaker, etc. can be connected by the video input / output interface 110, the audio input / output interface 109, the microphone input 108, and the like.

Camera control / external device multi-connector 10
Reference numeral 1 denotes a connector for controlling an external camera, an external microphone, and an external camera illumination among these external input / output devices. The camera control / control using the external device multi-connector 101 is performed by an instruction from the dial function key-3, an instruction from an operation unit connected to the conferencing operation unit Conerta 103, or multimedia demultiplexing / inter-terminal signal. This is realized by the control unit 26 controlling the non-voltage contact 31 such as a relay contact according to the control data received from the communication partner terminal received via the control unit 8. As described above, CCITT Recommendation H.264 is used as a communication frame. In the case of assuming the frame defined in H.221, the control unit 26 sends the BAS or MLP from the communication partner terminal.
According to the data, the control data is received, and the non-voltage contact 31 is controlled.
The structure of 01 is shown. As shown, zooms 612, 6
13, focus 610, 609, illumination 608, wiper 607, pan 606, 605, tilt 604, 60
3, camera microphone switching 602, 601, power supply 600
Contains the signal of.

With these signals, the control unit 26 controls the zoom, focus, external camera illumination, wiper, pan, and tilt of the external camera via the camera control / external device multi-connector 101. It is possible to control camera microphone switching and control ON / OFF of the power supply of any external device.

Next, the V11RS422 multi-conner 1
06 will be described.

V11RS422 Multi-Conner 106
Is a connector including a V11 interface and an RS422 interface.

In this embodiment, it is assumed that a conference unit, which will be described later, is connected to the V11RS422 multi-corner 106.

The RS422 interface in the V11RS422 multi-corner 106 is connected to the control unit 26 via the communication port 23. The control unit 26 uses RS422.
The interface is used to send and receive control data to and from the conference unit.

The V11 interface in the V11RS422 multi-conner 106 is connected to the data demultiplexer 20 and the voice codec 12. The data demultiplexing unit 20 demultiplexes the control data or data received from the multimedia demultiplexing / inter-terminal signal control unit 8 under the control of the control unit 26, and separates the separated control data or data into V
11 Send to interface. In addition, the data demultiplexing unit 2
On the contrary, 0 transmits the control data and data received from the V11 interface to the multimedia demultiplexing / inter-terminal signal control unit 8 after being multiplexed with the control data and data received from the G3 FAX interface. Incidentally, the above-mentioned H.264 communication frame is used as a communication frame. When the 221 frame is used, this control data can use MLP data.

The data from the data demultiplexing unit 20 to the V11 interface is sent as the burst data as it is by separating and extracting the data from the communication frame. The data from the V11 interface to the data demultiplexing unit 20 is also burst data of the same transfer rate as the data in the communication frame.

As described above, in this embodiment, the communication frame is
The data area and control data area of the system can be opened to the outside as they are. Therefore, the V11 interface can freely use a predetermined data area or control data area in the communication frame.

Here, FIG. 7 shows the basic configuration of the V11RS422 multi-corner 106.

In the figure, 700 to 702 are RS422 interfaces, and 703 to 710 are V11 interfaces.

The RS422 interface has transmission data 700, reception data 701, and a transfer clock 702. The V11 interface uses the transmission data 703,
Transmission burst clock 7 synchronized with transmission burst data
04, transmission frame sync 705, reception data 706,
Reception burst clock 7 synchronized with reception burst data
07, a reception frame sync 708, and two kinds of basic clocks 709 and 710.

Next, FIG. 8 shows the appearance of the AV meeting terminal according to the present embodiment.

FIG. 8a is a perspective view seen obliquely from the front, and FIG. 8b.
[Fig. 6] is a rear view of the part showing the arrangement of connectors.

Next, FIG. 9 to FIG. 13 show the configuration of an AV meeting system using the AV meeting terminal according to the present embodiment. In the figure, 1000 is an AV meeting terminal.

FIG. 9 shows an AV meeting system suitable for a person-to-person personal telephone call, and FIG.
Is an AV meeting system suitable for small-group video conferences, FIG. 11 is a simple AV meeting system for video conferences, and FIG. 12 is an AV suitable for full-scale video conferences.
A meeting system, FIG. 13 shows the configuration of an AV meeting system suitable for a more advanced video conference.

As shown in the figure, the AV player according to this embodiment is used.
According to the operating terminal, the video input / output interface 11
0, voice input / output interface 109, microphone input 10
8, G3 FAX modular jack 107, V11RS
422 Multi-Connelter 106, RS232C Connelter 1
05, mouse jack 104, conferencing console Conerta 1
03, camera control / external device multi-connector 101, G3 FAX900, computer 901 such as personal computer or word processor, camera 9
03, a monitor 904, a microphone 905, a camera pan tilter (head) 906, a conference operation device 907, and the like can be connected. Therefore, the AV meeting system can be flexibly configured according to the purpose of use.

In particular, according to the AV meeting terminal of this embodiment, as described above, the external interface by the digital data of the voice codec 12 is V11RS4.
Since it is provided in the 22 multi-connerter 106, as shown in FIG. 12, a high performance digital eco-canceller-1200 can be provided outside as needed.

Further, as shown in FIG. 13, a data system device 901 such as a G3 FAX 900, a personal computer or a word processor such as an electronic blackboard such as a word processor, a camera 903, a monitor 904, through a conference unit 1300. The microphone 905, the camera pan tilter 906, the conference operation device 907, etc. are connected, and the conference unit 1300
You may make it implement | achieve a more advanced conference function.

As shown, the conference unit 1300
Has a video control unit 1301, an audio control unit 1302, a unit control 1303, a video processing unit 1305, and a power supply unit 1306. The video control unit 1301 is connected to the video input / output interface of the AV meeting terminal. The audio control unit 1302, the unit control 1303, and the video processing 1305 are connected to the V11RS422 multi-corner 106 of the AV meeting terminal via an AV meeting terminal data interface section (not shown).

The unit controller 1303 is used for the conference operation unit 9
07, or the control unit 26 of the AV meeting terminal received via the RS422 interface.
In response to the instruction from the terminal or the control data received from the communication partner terminal via the V11 interface, each unit of the conference unit 1300 is controlled. Further, the unit control section 1303 uses the personal computer of the data received from the communication partner terminal via the V11 interface.
It acts as an intermediary between the data system device 901 such as an electronic blackboard such as a data processor or a word processor and the V11 interface.

The video control unit 1301 and the still image processing are AV
It controls the switching of cameras and monitors connected to the video input / output interface of the meeting terminal. The audio control unit 1302 controls switching of a microphone speaker or the like connected to the audio codec 12 of the AV terminal via the V11 interface. In addition, the voice control unit 130
2 also performs eco-cancellation processing if necessary. The image processing 1305 controls the camera pan / tilt 906.

As described above, according to the present AV meeting system, the data unit and the control data region open to the outside are used to directly control the conference unit connected to the communication partner terminal, etc. Can communicate with each other.

[0090]

As described above, according to the present invention, a still image and a moving image can be simultaneously displayed on one screen.
A V-meeting terminal can be provided.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an AV meeting terminal according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of an image codec of an AV meeting terminal according to an embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a PinP processing unit of an AV meeting terminal according to an embodiment of the present invention.

FIG. 4 is an explanatory diagram showing PinP processing of an AV meeting terminal according to an embodiment of the present invention.

FIG. 5 is a block diagram showing a configuration of a G3 FAX interface of an AV meeting terminal according to an embodiment of the present invention.

FIG. 6 is an explanatory diagram showing a configuration of a camera control / external device multi-connector of an AV meeting terminal according to an embodiment of the present invention.

FIG. 7 is an explanatory diagram showing a configuration of a V11RS422 multi-corner of an AV meeting terminal according to an embodiment of the present invention.

FIG. 8 is an explanatory diagram showing an appearance of an AV meeting terminal according to an embodiment of the present invention.

FIG. 9 is a block diagram showing a configuration example of an AV meeting system according to an embodiment of the present invention.

FIG. 10 is a block diagram showing a configuration example of an AV meeting system according to an embodiment of the present invention.

FIG. 11 is a block diagram showing a configuration example of an AV meeting system according to an embodiment of the present invention.

FIG. 12 is a block diagram showing a configuration example of an AV meeting system according to an embodiment of the present invention.

FIG. 13 is a block diagram showing a configuration example of an AV meeting system according to an embodiment of the present invention.

[Explanation of symbols]

1 camera 2 LCD display 3 Dial action key 4 VSW 5 image codecs 6 Telephone control man-machine interface 7 Multipoint conversation control 8 Multimedia demultiplexing / terminal signal control unit 9 Network interface / communication network control unit 10 D / R 11 VDT 12 voice codecs 13 ASW 14 Handsfree 15 handsets 16 G3 FAX interface 17 V11D / R 18 RS422 D / R 19 RS232C D / R 20 data demultiplexing 21 Communication interface matching 22 Bus SW 23 Communication port 24 Communication port 25 communication port 26 Control unit 27 Peripheral device control interface 28 Peripheral device control interface 31 Non-voltage contact 101 Camera control / external device multi-connector 103 Conference operation device Connerta 104 mouse jack 105 RS232C Conerta 106 V11RS422 multi-conner 107 G3 FAX Modular Jack 108 Microphone input 109 voice input / output interface 110 Video input / output interface

Claims (6)

[Claims] 1. An A / D converter for converting an input analog image signal into digital image data, and a still image for encoding the digital image data converted by the A / D converter and outputting encoded still image data. A coder, a moving image coder for encoding the digital image data converted by the A / D converter and outputting encoded moving image data, and an encoded moving image data and still image output by the moving image coder. A selector that selects and outputs one of the encoded moving image data output by the coder, a still image decoder that decodes the input encoded still image data into decoded still image data, and an input High-definition decoder and video decoder that decode encoded video data into decoded video data, and decoded by still picture decoder Still picture data and video decoder are decoded Decrypted video data and A / From the digital image data converted by the D converter, a pict-in-picture-image data for generating a pict-in-picture-image for at least two image data of the decoded still image data, the decoded moving image data, and the digital image. And a D / A converter that converts the picture-in-picture-image data created by the picture-in-picture-processing unit into an analog image signal and outputs the analog-image signal. Image codec. 2. An A / D converter that converts an input analog image signal into digital image data, and a still image that encodes the digital image data converted by the A / D converter and outputs encoded still image data. A coder, a moving image coder for encoding the digital image data converted by the A / D converter and outputting encoded moving image data, and an encoded moving image data and still image output by the moving image coder. A selector that selects and outputs one of the encoded moving image data output by the coder, a still image decoder that decodes the input encoded still image data into decoded still image data, and an input Decoding still image data and moving image decoder that decodes encoded moving image data to decoded moving image data, and decoded still image data and moving image decoder that the still image decoder has decoded Decrypted moving image data and A From the digital image data converted by the / D converter, a pict-in-picture-image for generating a pict-in-picture-image for at least two image data of the decoded still image data, the decoded moving image data, and the digital image. It has a picture-in-picture-processing unit for creating data and a D / A converter for converting the picture-in-picture-image data created by the picture-in-picture-processing unit into an analog image signal and outputting the analog image signal. Image codec IC. 3. The image codec according to claim 1, wherein the picture-in-picture processing unit is a still image decoder.
A still picture frame memory for storing the decoded still picture data decoded by the decoder, a moving picture frame memory for storing the decoded moving picture data decoded by the moving picture decoder, and the A / D
A self-portrait frame memory for storing the digital image data converted by the converter, and a pict-in-picture image for at least two image data of the decoded still image data, the decoded moving image data and the digital image. In addition, an image codec having a reading control means for controlling reading of image data from each frame memory. 4. An image codec according to claim 1, a communication control section for transmitting and receiving encoded image data via a digital communication path, and a camera for outputting the captured image signal to the image codec. A display for displaying an image indicated by the image signal decoded by the image codec, wherein the image codec creates the analog image signal from the coded image data received by the communication control means, and An AV meeting terminal characterized in that an image signal output to a display and inputted is encoded into encoded image data and sent to the communication control section. 5. The image coder according to claim 1, wherein the still image coder performs the encoding in accordance with a coding rule that follows the ISO standard JPEG algorithm, and the still image decoder. Performs the decoding according to a coding rule that follows the ISO standard JPEG algorithm, the moving picture coder performs the coding with a coding rule according to CCITT Recommendation H261, and the moving picture decoder uses the CITT. An image codec, characterized in that the decoding is performed according to a coding rule according to Recommendation H261. 6. The image coder according to claim 1, wherein the still image coder performs the encoding according to a code rule following the ISO standard JPEG algorithm, and the still image decoder. Performs the decoding according to a coding rule that follows the ISO standard JPEG algorithm, the moving picture coder performs the coding with a coding rule according to CCITT Recommendation H261, and the moving picture decoder uses the CITT. An image codec, characterized in that the decoding is performed according to a coding rule according to Recommendation H261.