JPH0738862A - Image communication terminal equipment - Google Patents

Abstract

PURPOSE:To reduce power consumption by detecting the state of a terminal on the basis of a bit position assigned to a BAS code. CONSTITUTION:When the telephone number of an opposite terminal is set from a key operation means 6 and an origination key is pressed, a call control means 14 makes a connection of a channel B with the opposite terminal through a line interface part 15. A control means 13 establishes frame synchronism on the basis of H.242 by using the channel B, determines a data communication method, a communication speed, etc., for a sound and an image according to data on the BAS code, and starts a communication according to the determined items. A detecting means 11 detects audio-OFF data with the data on the BAS code and sends the OFF data to a terminal power source control means 10. Then the power sources of unnecessary terminals are turned OFF.

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 A conventional image communication terminal device will be described below with reference to the drawings. FIG. 2 is a functional block diagram of a conventional image communication terminal device. In FIG. 2, 1 is a microphone, 2 is a speaker, 3 is a camera for taking a self-portrait, 4 is a monitor for displaying an image from the other party or self-portrait, 5 is a scanner for capturing a still image, 6
Is a key operation means for inputting a telephone number and selecting a function, 7 is a voice control means for compressing and encoding (decompressing / decoding) voice data, and 8 is compressing and encoding (decompressing / decoding) moving image data. ), A still picture control means 9 for compressing and encoding (decompressing / decoding) still picture data, and a moving picture, still picture, and audio data for CCITT Recommendation H.264. Two
21 (64 in audiovisual teleservice
CDMA to 1920 kbps channel frame structure) or a multiplexing / separating means for separating a frame sent from the other party into a moving image, a still image, and audio data. 13 is CCITT Recommendation H.264. 242
BAS (Bit-rate Allocation Signal) control means for executing communication means based on (a method of setting communication between audiovisual terminals using digital channels up to 1920 kbps), 14 is an incoming / outgoing call, disconnection Etc., call control means for managing calls, 15 is a line interface section for connecting terminals to an integrated services digital network (ISDN), and 16 is ISD
N and 17 are image communication terminal devices.

FIG. 3 is an explanatory diagram of a multiplexed frame structure in a conventional image communication terminal device, and FAS is a frame synchronization signal. FIG. 4 is a numerical diagram of the BAS code in the conventional image communication terminal device.

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 means 6 and the call key is pressed, the call control means 14 establishes a B channel connection with the partner terminal via the line interface section 15. After the connection is completed, H.S. 2 based on H.242, the frame synchronization is established as shown in FIG.
The data communication method of voice or image, the data communication speed, etc. are determined in accordance with the data of the BAS code shown in, and the data communication of voice or image is started according to the determined items.

[0006]

In the above-mentioned conventional image communication terminal device, the state of the terminal is determined from the data of BAS code. That is, for example, the power of the microphone 1 and the speaker 2 remains on even when the audio is off with the BAS code, and the monitor 4 and the camera 3 remain on even when the video is off. In other words, the power of the terminal is always on regardless of the BAS code, so that there is a problem that even unnecessary terminals are always on and power consumption increases.

Therefore, an object of the present invention is to provide an image communication terminal device capable of reducing power consumption.

[0008]

In order to solve the above-mentioned problems, the present invention newly added to the conventional image communication terminal device, BA
A BAS code detecting means for detecting the state of the terminal from the bit position assigned to the S code, and a terminal power supply control means for controlling ON / OFF of the power supply of the terminal by the detected BAS code are provided.

[0009]

With the above-described structure, the present invention can grasp the state of the terminal from the BAS code and turn on / off the power of the terminal when establishing frame synchronization.

[0010]

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. 1 is a microphone, 2 is a speaker, 3 is a camera, 4 is a monitor, 5 is a scanner, 6 is a key operation means, 7 is a voice control means, 8 is a video control means,
9 is still image control means, 12 is multiplexing / demultiplexing means, 13 is B
AS control means, 14 is call control means, 15 is a line interface section, and 16 is ISDN, which are the same as those of the conventional example. Reference numeral 10 is a terminal power supply control means for switching the power supply of the terminal on and off, and 11 is a BAS code detection means for detecting the current state of the terminal from the BAS code. The operation of the image communication terminal device configured as described above will be described below.

As an example, the case of audio off will be described. As in the conventional image communication terminal device, when the telephone number of the partner terminal is set by the key operation means 6 and the call key is pressed, the call control means 14 establishes the B channel with the partner terminal via the line interface unit 15. Make a connection. After the connection is completed, H.S. 2 based on 242, the frame synchronization is established as shown in FIG. 2, and after the synchronization is established, the data communication method of voice and image, the data communication speed, etc. are determined according to the data of the BAS code shown in FIG. In accordance with this, data communication of voice and image is started. At this time, the BAS code data is detected by the BAS code detection means 11 as audio-off data. Then, the audio-off data is sent to the terminal power supply control means 10. Upon receiving this data, unnecessary terminals are powered off. In this way, the power consumed by the user can be reduced without turning the power of the terminal on and off as necessary.

[0013]

As described above, according to the present invention, the CCIT
Recommendation H.T. It is possible to turn on / off the power supply of the terminal by simply adding simple hardware and control means to the function that realizes 221 and thus reduce power consumption.

[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 is an explanatory diagram of a multiplexing frame structure in a conventional image communication terminal device.

FIG. 4 is a numerical diagram of a BAS code in a conventional image communication terminal device.

[Explanation of symbols]

 6 Key Operation Means 7 Voice Control Means 8 Video Control Means 9 Still Image Control Means 10 Terminal Power Supply Control Means 11 BAS Code Detecting Means 12 Multiplexing / Demultiplexing Means 13 BAS Control Means 14 Call Control Means 15 Line Interface 16 ISDN 17 Image Communication Terminals apparatus

Claims (1)

[Claims] 1. In an image communication terminal device having a function of multiplex transmission of video, audio and data, the state of the terminal is detected from the bit position assigned to the bit rate assignment signal at the sending side and receiving side terminals. BAS code detecting means,
An image communication terminal device comprising terminal power control means for controlling power on / off of a terminal according to the detected BAS code.