JPH089067A - Image communication terminal equipment - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an image communication terminal capable of flexibly supporting various applications. [Structure] A function of exchanging information for controlling a camera or the like of a partner terminal by using an originating sub-address information element in a call setting message, a function of exchanging information for controlling a division method in a data area, and The data area is divided based on the control information to send / receive a plurality of data. [Effect] By using the calling subaddress information element in the call setup message on the D channel, the information for controlling the camera of the other terminal can be sent without using the data area, and the data area can be arbitrarily large. Since it can be easily divided into a plurality of areas for use, the data area can be effectively used and various applications can be flexibly supported.

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 video, audio and data.

[0002]

2. Description of the Related Art In recent years, CCITT has formalized a video encoding method, a multiplexing method, and a communication procedure for audiovisual services, and in accordance with this, each company has made a video conference system and a video telephony system conforming to the CCITT recommendation. Image communication terminal devices have been put on the market.

A conventional image communication terminal device will be described below with reference to the drawings. FIG. 7 is a functional block diagram of a conventional image communication terminal device. In FIG. 7, 1 is a camera for taking a self-portrait, 2 is a monitor for displaying an image from the other party or self-portrait, 3 is a microphone, and 4 is a monitor. Is a speaker, 5 is a tablet for telewriting,
6 is a key operation unit for inputting a telephone number and selecting a function, 7 is a codec unit for compressing / encoding (decompressing / decoding) video data and audio data, and 8 is for converting data from a tablet. A telewriting control unit that enables display on a monitor, a display control unit 9 that controls switching of display of video on the monitor 1, and a display control unit 10 that displays video, audio, and telewriting data according to CCITT Recommendation H.264. 221 (from 64 kb / s in audiovisual teleservice to 1
920 kb / s channel frame structure) or a multiplexing / separating unit that separates a frame sent from the other party into video, audio, and telewriting data, 11 is based on settings from the key operation unit. , A terminal control unit for controlling the entire terminal, 12 is a line interface unit for connecting the terminal to an ISDN line, and 13 is CCITT Recommendation H.264. A BAS (Bit-rate Allocation Signal) control unit that executes a communication procedure based on 242 (a method for setting communication between audiovisual terminals using digital channels up to 1920 kb / s), and 14 is an incoming / outgoing call, disconnection, and the like. A call control processing unit that manages calls.

Further, FIG. 3 shows CCITT Recommendation H.264. FIG. 22 is a diagram showing a multiplexing frame structure defined in 221;
FIG. 4 shows CCITT Recommendation H.264. BA defined in 221
It is a numerical table of S code.

The operation of the conventional image communication terminal device configured as described above will be described below.

When the telephone number of the partner terminal is set by the key operation unit 6 and the call key is pressed, the terminal control unit 11 notifies the call control processing unit 14, and the call control processing unit 14 via the line interface unit 12. The B channel is connected to the partner terminal. After the connection is completed, the B.S. A mode initialization procedure based on 242 is activated.

In the mode initialization procedure, first, frame synchronization as shown in FIG. 3 is established, and after the synchronization is established, the other terminal using the audio / transfer capability and data / video capability of the BAS code shown in FIG. Exchange terminal capabilities with. Then, the command BAS code is used to switch to an appropriate operation mode in consideration of the capabilities of the own terminal and the partner terminal.

A combination of the two frames shown in FIG. 3 is called a sub-multiframe, and the BAS is the first frame of 8 frames.
It consists of a BAS code represented by bits and an error correction code represented by 8 bits of the second frame. The switching of the operation mode becomes effective from the next sub-multiframe after receiving the command BAS code.

FIG. 5A shows an example of division within a frame when 2B is used. At this time, voice is 16 kb / s, low speed data (LSD) is 40 kb / s, and video is 68.8 kb / s.
Transmitted in.

[0010]

However, in the above-mentioned conventional image communication terminal device, there are two areas that can be allocated for data using the BAS code, a low speed data area and a high speed data area. When it was necessary to send the coordinate data at the time of telewriting using, the accumulated still image data, the control data of the camera of the partner terminal, etc. at one time, it could not be sent.

Further, the high-speed data area can be used only when communicating with a plurality of B channels or H0 channel, but since it can only be allocated in units of 64 kb / s,
The problem is that it is inefficient to allocate to data that can be sent at a low speed of less than 64 kb / s, and if the transmission capacity of the entire communication is small (for example, during 2B transmission), almost no area can be taken for sending video. was there.

In order to solve this, when the transmission speed of each data is low, it is possible to divide the low speed data area or the high speed data area into a plurality of areas, and use the BAS code defined in the recommendation. The procedure could not be realized.

[0013]

In order to solve the above problems, information for controlling a camera or the like of a partner terminal is exchanged with the partner terminal using a calling subaddress information element in a call setting message. Means, a means for exchanging information for controlling how to divide the data area with a partner terminal, and a means for dividing the data area based on the control information and transmitting / receiving a plurality of data. It is a thing.

[0014]

According to the present invention, when it becomes necessary to send still image data and telewriting data while performing video and audio communication, the present invention uses the calling subaddress information element in the call setting message to send data to the other terminal. Area 2
Slow data, by notifying you to split
Two types of data can be transmitted in one of the low speed and high speed areas without using the two areas of the high speed data.

Further, when it becomes necessary to control the camera or the like of the other terminal, the low speed / currently being used for transmitting / receiving other data.
It is possible to notify the other terminal by using the originating subaddress information element in the call setup message without using the high speed data area.

[0016]

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a functional block diagram of this embodiment.
1 is a camera, 2 is a monitor, 3 is a microphone, 4 is a speaker,
5 is a tablet, 6 is a key operation unit, 7 is a codec unit,
8 is a telewriting control unit, 9 is a display control unit, 10 is a multiplexing / demultiplexing unit, 11 is a terminal control unit, 12 is a line interface unit, 13 is a BAS control unit, and 14 is a call control processing unit. It has the same configuration as the example. Reference numeral 15 is a scanner for taking in still image data, 16 is a still image control unit for compressing / decompressing still image data, 17 is a remote control unit for controlling a camera of a partner terminal, 18 is a low speed data area, and a high speed data area is divided into a plurality of areas. A data area division control section 19 for controlling the data area division, and 19 divides the data area based on an instruction from the data area division control section to multiplex / multiplex a plurality of data.
A data area multiplexing / separating unit 20 for separating is a control information processing unit.

Further, FIG. 2 shows the data of the originating sub-address information element used when controlling the division of the data area and controlling the camera of the partner terminal in this embodiment, and FIG. 6 shows the control information in this embodiment. It is a sequence diagram when exchanging.

The operation of the image communication terminal device configured as described above will be described below.

The case where the low-speed data area is divided into two in the case of communicating using the 2B channel will be described.

At present, as shown in FIG.
/ S, tablet data (low speed data) 40 kb / s,
It is assumed that the video is multiplexed at 68.8 kb / s and is communicating with the partner terminal. At this time, consider a case where still image data is sent using 32 kb / s in the low speed data area.

In FIG. 1, when the still image data transmission is selected from the key operation unit 6, the terminal control unit 11 detects it and notifies the data area division control unit 18 of it. In response to this, the data area division control unit 18 informs the control information processing unit 20 of control information for informing the partner terminal that the low-speed data area is divided into two and the still image data is transmitted at 32 kb / s. Instruct to send.

Upon receipt of this, the control information processing unit 20 creates the data as shown in FIG. 2B by using the identification as shown in FIG. 2A for the instructed information, and the call control processing unit. Notify 14 The call control processing unit 14 inserts this data into the sub-address information in the originating sub-address information element configured as shown in FIG. 2D, and creates a call setup message. Thereafter, as shown in FIG. 6, a call is made to notify the other terminal of the control information, and the data area division control unit 18 is notified of the transmission completion via the control information processing unit 20.

The data area division control unit 18, which has received the notification of the completion of transmission, instructs the data area multiplexing / demultiplexing unit 19 to set the low speed data area to the sub-channel # 3 as shown in FIG.
~ # 6 is assigned to still image data, and the remaining sub-channel # 7 is assigned to tablet data. Based on this, the data area multiplexing / separating unit 19 multiplexes still image data and tablet data into the low-speed data area and multiplexes them. Separation part 1
Send to 0. Then, the tablet data is sent from the multiplexer / demultiplexer 10 at 8 kb / s and the still image data is sent to the partner terminal at 32 kb / s.

On the contrary, when the call control processing unit 14 detects the call setup message including the calling sub-address information element as the control information from the partner terminal, the control information processing unit 20 analyzes the information and the information is stored in the data area. If it is related to the division control, the data area division control unit 18 is notified. Upon receiving this, the data area division control unit 18 switches the data area multiplexing / demultiplexing unit 19 as instructed by the partner terminal and notifies the terminal control unit 11 to switch the internal operation. Then, the terminal control unit 11 controls the still image control unit 7 and the telewriting control unit 8 to prepare for the transmitted data.

At this time, as shown in FIG. 6, the partner terminal receiving the call setup message releases the call by responding with a release completion message.

When the key for zooming up the camera of the partner terminal is pressed, the terminal control unit 11 detects it and notifies the yen buying control unit 17 of it. Responsive thereto, the remote control unit 17 instructs the control information processing unit 20 to transmit the control information for notifying that the camera is zoomed up to the partner terminal. Upon receiving this, the control information processing unit 20
Using the identifications of FIG. 2 (a) to identify the indicated information, FIG.
Data such as (c) is created and notified to the call control processing unit 14. The call control processing unit 14 stores this data in FIG.
The call setup message is created by inserting it into the sub-address information in the calling sub-address information element configured as described above. Thereafter, as shown in FIG. 6, a call is made to notify the control information to the partner terminal.

On the contrary, when the start residence control information processing section 20 detects the call control processing section 14, the remote control section 17 detects the call setting message including the calling subaddress information element as the control information related to the camera control from the partner terminal. The remote control unit 17 which has received the instruction instructs the terminal control unit 11 to control the camera based on the instruction from the partner terminal. Then, the terminal control unit 11 having received the instruction controls the movement of the camera of the own terminal.

In the above embodiment, only the data area is divided into two and the control of the partner camera is performed. However, by finely defining the data of the calling sub-address information element according to the application, fine control becomes possible.

[0030]

As described above, according to the present invention, a call is made to transmit control information, and the calling subaddress information element in the call setting message at the time of calling is used to control the camera or the like of the other terminal. Information can be sent without using the data area, and the data area can be divided into multiple areas of arbitrary size and used easily, enabling effective use of the data area and various applications. We can respond flexibly.

[Brief description of drawings]

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

FIG. 2 is a diagram showing a numerical table of originating sub-address information elements used when controlling division of a data area and controlling a camera of a partner terminal in an embodiment of the present invention.

FIG. 3 CCITT Recommendation H.264. 22 shows a multiplexing frame structure defined by H.221.

FIG. 4 CCITT Recommendation H. B defined in 221
Diagram showing numerical table of AS code

5 is a diagram illustrating H.264 during 2B communication. Diagram showing an example of division within 221 frames

FIG. 6 is a sequence diagram according to an embodiment of the present invention.

FIG. 7 is a functional block diagram of a conventional image communication terminal device.

[Explanation of symbols]

 1 camera 2 monitor 3 microphone 4 speaker 5 tablet 6 key operation part 7 codec part 8 telewriting control part 9 display control part 10 demultiplexing part 11 terminal control part 12 line interface 13 BAS control part 14 call control processing part 15 scanner 16 stationary Image control unit 17 Remote control unit 18 Data area division control unit 19 Data area multiplexing / demultiplexing unit 20 Control information processing unit

Claims (1)

[Claims] 1. CCITT Recommendation H.264. 221, video,
In an image communication terminal device having a function of multiplexing transmission of voice and data, information for controlling a camera or the like of the partner terminal is exchanged with the partner terminal by using a calling subaddress information element in a call setting message. Means, means for exchanging information for controlling how to divide the data area with the other terminal, and means for dividing the data area based on the control information and transmitting / receiving a plurality of data An image communication terminal device characterized by the above.