JPH08228335A - Image communication therminal equipment - Google Patents

Abstract

PURPOSE: To transmit desired image data with an easy operation without exchanging a painting by a camera by storing the image data in plural frames and reading out selected image data based on summary display. CONSTITUTION: When the image data inputted from a camera 4 for painting is transmitted, required image data is accumulated in frame memory in advance. An operator batch-displays the content of the image data in memory 15 on the monitor 5 of a display part 17 while a video conference is being held, and selects the required image data from a summary table. A frame memory control part 16 takes out the selected image data from the memory 15, and sends it to a moving image control part 9. The control part 9 comprises the frame of the image data via a multiplex/separation part 11, and transmits it from a line interface part 12 to opposite equipment via an ISDN 19. Therefore, the video conference without requiring a complicated operation is held.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image communication terminal device having a multiplex transmission function for voice data, moving image data and still image data.

[0002]

2. Description of the Related Art In recent years, CCITT recommendation (current ITU-T:
At the International Telecommunication Union)
Video coding for services, still image coding,
The multiplex system and the communication procedure have been officially recommended, and in accordance with this, video communication terminal devices such as video conference systems and video phones conforming to the recommendations have been developed by various companies.

FIG. 2 is a functional block diagram of a conventional image communication terminal device. The image communication terminal device 100 of FIG. 2 includes a voice control unit 8, a moving image control unit 9, a still image control unit 10, a multiplexing / demultiplexing unit 11, a line interface unit 12, a BAS (Bit-rate Allocation Signal). ) A control unit 13 and a call control processing unit 14 are included.

The voice control unit 8 has a microphone 1 for inputting voice.
And a speaker 2 for outputting sound are connected. The moving image control unit 9 includes a photographing camera 3 and a document camera 4.
Is connected. Further, the moving image control unit 9 and the still image control unit 10 are connected to a monitor 5 that displays an image sent from the partner device or an image captured by the image capturing camera 3 or the document camera 4. Further, a scanner 6 for capturing a still image is connected to the still image control unit 10. A key operation unit 7 for inputting a telephone number and selecting a function is connected to the call control processing unit 14.

The voice control unit 8 compression-codes and decompresses voice data. The moving image control unit 9 compression-codes and decompresses moving image data. The still image control unit 10 compression-codes and decompresses still image data.

The multiplexer / demultiplexer 11 provides CCITT recommendation (current IT) for voice data, moving image data and still image data.
UT) H. In addition to multiplexing with the frame format according to 221, the frame transmitted from the partner device is separated into audio data, moving image data, and still image data. Here, CCITT Recommendation (current ITU-T: International Telecommunication Union) H.264. 221 is 64 kbps to 1920 kbps in audiovisual teleservice
It defines the frame structure of the channel.

The BAS control unit 13 is a CCITT recommendation (current ITU-T: International Telecommunication Union) H.264. The communication procedure based on 242 is executed. Here, CCITT recommendation (current IT
UT: International Telecommunication Union). 242 is 1920k
It defines a method for setting communication between audiovisual terminals using digital channels up to bps.

The call control processor 14 manages calls such as incoming and outgoing calls and disconnections. The multiplexer / demultiplexer 11 is connected to an ISDN (Integrated Service Digital Network) 19 via a line interface 12.

FIG. 3 shows CCITT Recommendation (current ITU-T: International Telecommunication Union) H.264. 221 shows a multiplexing frame structure defined in H.221. As shown in FIG. 3, bit numbers 1 to
7 are assigned subchannels 1 to 7, and bit number 8 is assigned a frame synchronization signal (FAS), a bit rate assignment signal (BAS), and subchannel 8.

CCITT recommendations (current IT
UT: International Telecommunication Union). 221 shows a numerical table of BAS codes defined in 221.

This numerical table shows the BAS code in 8 bits, and the column header shows the attribute in the form of bits (b0, b1, b2). Bit (000) in FIG. 4 indicates an audio command, and bit (001) indicates a transfer rate command. Bit (010) indicates video or other command, and bit (011) indicates LSD (low speed data) /
3 shows an MLP (Multi Layer Protocol) command. Bit (100) in FIG. 5 indicates audio / transfer rate capability, bit (101) indicates data / video capability, and bit (111) indicates escape. The leftmost column of the numerical table shows the values in decimal notation of bits [b3, b4, b5, b6, b7]. For example, "chan. # 6" is (001)
It has a value of [10110].

Next, the image communication terminal device 10 shown in FIG.
The operation of 0 will be described. When the operator sets the telephone number of the partner device using the key operation unit 7 and presses the call key, the call control processing unit 14 connects the partner device with the B channel via the line interface unit 12. .

After the connection is completed, the BAS control unit 13 uses the B channel to make a CCITT recommendation (current ITU-T: International Telecommunication Union) H.264. Based on 242, frame synchronization is established. After the synchronization is established, the reception capability notified from the other device using the values of the audio / transfer rate capability and the data / video capability of the BAS code numerical table shown in FIG. 5 is referred to as the transmission capability of the image communication terminal device 100. By comparison, the operation mode is determined so as to perform the communication with the common maximum function. Then, the BAS control unit 13 shows the commands (audio command, transfer rate command and other commands) representing the decided operation mode in the BAS shown in FIG.
The code is used to transmit to the partner device to instruct mode switching of the partner device.

After that, when transmitting the moving image data to the other party's device, the moving image control unit 9 sends the moving image data fetched from the photographing camera 3 and the document camera 4 to the NTS.
C system (National Television System Committee; Japanese and US television systems) and PAL system (Ph
ASE Alternation by Line color television; CIF (luminance signal Y: 360 × 288, color difference signals CB, CR: 180 × 144) or QCIF which is an intermediate video signal format common to European television systems.
(Luminance signal Y: 180 × 144, color difference signals CB, C
R: 90 × 72) and then compressed (see FIG. 6).

When the transmission request key is pressed by the key operation unit 7, the moving image control unit 9 outputs the processed moving image data to the multiplexing / demultiplexing unit 11. The multiplexing / separating unit 11 multiplexes the moving image data with other data to form a frame having the structure shown in FIG. 3, and transmits the frame from the line interface unit 12 to the partner device via the ISDN 19.

The transmission capacity provided by a single channel of ISDN 19 is 64 kbps, 384 kbps or 1536/1920 kbps, but if the transfer capability of both terminal devices permits, a plurality of these channels should be used. It is also possible to set a transmission capacity line having an intermediate value and perform data transmission by the set line. For example, if two 64 kbps channels are used, 1
A line with a transmission capacity of 28 kbps can be set. In this case, additional call setup is performed after it has been confirmed that the terminal devices on both the transmitting side and the receiving side have the transfer capability of using multiple channels in the capability exchange by the B channel connected first. , Channels are added.

[0017]

However, in the above-mentioned image communication terminal device 100, when the image data of a plurality of documents is captured from the document camera 4 and transmitted to the partner device, the operator of the document camera 4 operates. The image data must be captured many times while replacing the calligraphy below. Such work is very troublesome for the operator.

According to the present invention, desired image data among a plurality of image data can be transmitted by a simple operation without the operator having to repeatedly replace a document under the document camera 4. An object is to provide an image communication terminal device.

[0019]

[Means for Solving the Problems]

(1) First Invention An image communication terminal device according to the first invention comprises a storage means, a content display means, a control means, and a communication means.

The storage means stores a plurality of frames of image data. The content display means displays a list of the content of the image data of a plurality of frames stored in the storage means. The control means reads out the image data selected based on the list display by the content display means among the image data of the plurality of frames stored in the storage means. The communication unit transmits the image data read by the control unit.

(2) Second Invention In the image communication terminal device according to the second invention, in the configuration of the image communication terminal device according to the first invention, the storage means stores a plurality of frames fetched from the document camera. It stores image data.

[0022]

In the image communication terminal device according to the first and second aspects of the invention, the image data of a plurality of frames is stored in the storage means in advance. Then, the image data selected by the operator based on the list display by the content display means is read from the storage means by the control means and transmitted by the communication means. Therefore, desired image data among the plurality of image data can be transmitted by a simple operation without the operator having to replace a plurality of documents under the document camera.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a functional block diagram of an image communication terminal device according to an embodiment of the present invention. This image communication terminal device is used, for example, in a video conference. 1 and 2
In FIG. 6, the same or corresponding parts are designated by the same reference numerals, and the description thereof will be omitted.

The image communication terminal device 100a of FIG. 1 is different from the image communication terminal device 100 of FIG. 2 in that a frame memory 15, a frame memory control unit 16 and a frame memory content display unit 17 are further provided.

The frame memory 15 stores the image data of a plurality of frames supplied from the document camera 4. The frame memory control unit 16 selects and takes out the image data required by the operator from the image data of a plurality of frames stored in the frame memory 15. The frame memory content display unit 17 displays a list of the contents of the image data of a plurality of frames stored in the frame memory 15.

In the present embodiment, the frame memory 15 constitutes a storage means, the frame memory content display section 17 constitutes a content display means, and the frame memory control section 16 constitutes a control means. Further, the multiplexing / demultiplexing unit 11 and the line interface unit 12 form a communication means.

Next, the operation of the image communication terminal device 100a shown in FIG. 1 will be described. When the operator sets the telephone number of the other device (the image communication terminal device 100a on the receiving side) using the key operation unit 7 and presses the call key, the call control processing unit 14 causes the other device via the line interface unit 12. The B channel is connected to and from.

After the connection is completed, the BAS control unit 13 uses the B channel to make a CCITT recommendation (current ITU-T: International Telecommunication Union) H.264. Based on 242, frame synchronization is established. After the synchronization is established, the reception capability notified from the partner device using the values of the audio / transfer rate capability and the data / video capability of the BAS code value table shown in FIG. Communication terminal device) 100
The operation mode is determined so that the communication is performed by the common maximum function in comparison with the transmission capability of a. And BA
The S control unit 13 transmits a command (audio command, transfer rate command, and other command) representing the determined operation mode to the partner device by using the BAS code shown in FIG. 4, and switches the partner device to the mode. Order.

After that, when transmitting the moving image data to the other party's device, the moving image control section 9 sends the moving image data taken from the photographing camera 3 and the document camera 4 to the NTS.
CIF (luminance signal) which is an intermediate video signal format (compression format) common to the C method and the PAL method
Y: 360 × 288, color difference signal CB, CR: 180 ×
144) or QCIF (luminance signal Y: 180 × 14
4, color difference signal CB, CR: 90 × 72) and compression.

When the transmission request key is pressed by the key operation unit 7, the moving image control unit 9 outputs the processed moving image data to the multiplexing / demultiplexing unit 11. The multiplexing / demultiplexing unit 11 multiplexes the moving image data with other data to form a frame having the structure shown in FIG. 3, and transmits the frame from the line interface unit 12 to the partner device via the ISDN 19.

As described in the description of the image communication terminal device 100 of FIG. 2, the transmission capacity provided by the single channel of the ISDN 19 is 64 kbps, 384 kbps or 1536/1920 kbps, but both terminal devices have the same transmission capacity. If the transfer capability permits, a plurality of these channels can be used to set a line having a transmission capacity having an intermediate value, and data can be transmitted by the set line.

In this embodiment, when the image data input from the document camera 4 is transmitted to the partner device, necessary image data is stored in the frame memory 15 in advance. Then, the operator displays a list of the contents of the image data stored in the frame memory 15 on the monitor 5 by the frame memory content display unit 17 during the video conference, and selects the necessary contents from the list display. Select image data. As a result, the frame memory control unit 16
Picks up the selected image data from the frame memory 15 and gives it to the moving image controller 9. When the transmission request key of the key operation unit 7 is pressed, the moving image control unit 9 outputs the image data to the multiplexing / separating unit 11, and the multiplexing / separating unit 11
3 forms the frame shown in FIG. 3 by multiplexing the image data with other data, and transmits the frame from the line interface unit 12 to the partner device via the ISDN 19.

[0033]

As described above, according to the present invention, the image data of a plurality of frames is stored in the storage means in advance, and the image data selected based on the list display is read from the storage means and transmitted. It is possible to transmit desired image data among a plurality of image data by a simple operation, without requiring the operator to repeatedly replace the document under the document camera. Therefore, the video conference can be held without any troublesome operation.

[Brief description of drawings]

FIG. 1 is a functional block diagram of an image communication terminal device according to an embodiment of the present invention.

FIG. 2 is a functional block diagram of a conventional image communication terminal device.

FIG. 3 CCITT Recommendation (current ITU-T: International Telecommunication Union) H.264. 221 is a diagram showing a multiplexing frame structure defined in H.221.

FIG. 4 CCITT Recommendation (current ITU-T: International Telecommunication Union) H.264. A diagram showing a numerical table of BAS codes defined in 221

FIG. 5: CCITT Recommendation (current ITU-T: International Telecommunication Union) A diagram showing a numerical table of BAS codes defined in 221

FIG. 6 is a diagram showing a format of a common intermediate image.

[Explanation of symbols]

 1 Microphone 2 Speaker 3 Imaging Camera 4 Document Camera 5 Monitor 6 Scanner 7 Key Operation Section 8 Voice Control Section 9 Moving Image Control Section 10 Still Image Control Section 11 Multiplex / Demultiplex Section 12 Line Interface Section 13 BAS Control Section 14 Call Control Processing unit 15 Frame memory 16 Frame memory control unit 17 Frame memory content display unit 100a Image communication terminal device

Claims (2)

[Claims] 1. Storage means for storing image data of a plurality of frames, content display means for displaying a list of contents of the image data of the plurality of frames stored in the storage means, and the plurality of storage means stored in the storage means. An image communication terminal device including a control unit for reading out image data selected based on the list display by the content display unit out of image data of a frame, and a communication unit for transmitting the image data read by the control unit . 2. The image communication terminal device according to claim 1, wherein the storage means stores a plurality of frames of image data taken from a document camera.