JPH01198144A - Terminal for packet communication video conference - Google Patents

Abstract

PURPOSE:To improve packet processing ability by individually making voice encoded data and picture encoded data to be a packet, multiplying the packet- processed data with the aid of a circuit control part and sending the multiplied packet to a circuit. CONSTITUTION:A voice signal inputted from a microphone 2 is encoded by a voice CODEC 8, converted to parallel data by a codex interface part 104, transferred to a memory for data 103, divided to a fixed data length, simultaneously executed the addition of a packet header and transferred to the circuit control part 300 as the voice packet data. In the same way, picture data is transferred to the control part 300 as the picture packet data by encoding a picture signal from a camera 4 with the aid of an picture CODEC 9, dividing the picture encoded data to a fixed data length and simultaneously adding the packet header and the like to it with the aid of a picture packet part 200.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement of a packet communication video conference terminal for conducting a video conference using packet communications.

[Prior art] Figure 4 shows a conventional packet communication video conference terminal 1111.
This is a block diagram showing the configuration of the packet communication television conference, and in the figure, (1) is the three terminals of the packet communication TV conference, (2) is the microphone, (3) is the speaker, (4) is the camera, (5) is the monitor TV, and (6) is the
) is a line, (7) is a set of packets)'L and a PAD unit that performs decomposition, (8) is an audio codec unit that encodes and decodes audio data, and (9) encodes and decodes image data. The image codec section (500) is an audio/image PAD that multiplexes and packetizes the encoded audio data sent from the audio codec section (8) and the encoded image data sent from the image codec section (9). Part, (5
04) is a multiplex/minute i11 unit that multiplexes and separates audio data and image data of serial data, (505) is a serial/parallel conversion unit that converts serial data into parallel data or inversely converts it, and (501) is a CPU. , (50
2) is a program memory, (503) is a data memory, and (506) is a line control interface unit that exchanges data with the line side.

FIG. 5 shows the flow of processed audio image data in the audio image PAD section (500).
) is an internal bus, and (400c) is audio/image multiplied packet data with a packet header added.

Next, the operation will be explained with reference to FIGS. 4 and 5.

First, in FIG. 4, an audio signal input from a microphone (2) is encoded by an i-key voice codec (8) and passed to a PAD section (7) in the form of serial data. Similarly, the image signal input from the camera (4) is encoded by the image codec (9) and sent to the PAD unit (7) in the form of serial data.

Next, in the multiplexing/demultiplexing section (504) of the PAD section (7),
−, the notation data and image data are multiplexed, and then,
The data is converted into parallel data by a serial-parallel data converter (505), and stored in a data memory (503) by a CPU (501).

Then, the stored audio/image multiplexed data is added with a packet header etc. by the X, 25 level 3 protocol processing stored in the program memory (502), and sent from the line control interface unit (506) to the line (
6).

On the other hand, the audio/image packets received from the line (6) follow the reverse order to the above and are output to the speaker (3) and monitor television (5).

[Problems to be Solved by the Invention] Conventional packet communication video conference terminals are configured as follows. There are demands for short packet length and high-speed packet processing, and
There are many problems in putting audio data and image data in the same packet due to differences in information sources.

This invention was made in order to solve the above-mentioned problems, and it is possible to select the packet length size for audio data and image data based on the specificity of each data, and also when the amount of information generated is considerably large. The purpose of the present invention is to obtain a packet communication video conference terminal that can sufficiently follow the This is a distributed processing method in which data and image data are individually processed as packets, and the audio data packets and image data packets are multiplexed by the line control unit that sends the data to the line side.

[Function] The packet communication video conference terminal according to the present invention has the following 1-
With this configuration, audio data and image data are individually packetized based on the specificity of each data, audio packet data and image packet data are respectively generated, and each packet processed packet data is are multiplexed and transmitted by the line control unit.

[Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be described with reference to the drawings. 1st
In the figure, (1) is a packet communication video conference terminal, (
2) is a microphone, (3) is a speaker, (4) is a camera, (
5) is a monitor TV, (6) is a line, (7) is a PAD unit that assembles and disassembles packets, (8) is an audio conidec unit that encodes and decodes audio data, and (9) is an image data Image codec unit for encoding and decoding (10
0) is an audio packet unit that assembles the audio data sent from the 1°9 voice codec unit (8) into packets or disassembles the audio packet data from the line, and (200) is the audio packet unit that assembles the audio data sent from the 1°9 voice codec unit (8), and (200) is the audio packet unit that assembles the audio data sent from the 1°9 voice codec unit (8). The image packet section (300) assembles the sent image data into packets or disassembles the image packet data from the line, and the audio packet section (100)
) and the image packet unit (200), the packet data is sent to the line (6), and the multiplexed packet data from the line is separated into audio packets and image packets, respectively. , a line control section (400) that sends each packet data to the audio packet section (100) and the image packet section (200');
) and the line control unit (300), a data bus (
101) to (301) are CPUs, (102) to (302
) is a program memory, (103) to (303) are data memories, (104) and (204) are a codec interface unit that converts serial data from the codec into parallel data for CI'U processing, (105)
) and (205) are bus interface units that exchange data with the line control unit (300) via the data bus (400), and (306) are line control interface units that exchange data with the line side.

FIG. 2 shows the flow of data between the audio packet section (100), the image packet section (200), and the line control section (300), where (400a) is g-voice power data with a packet header added; (400b) is image packet data to which a packet header is similarly added.

The operation of the embodiment of the present invention will be explained with reference to FIGS. 1, 2, and 3.

First, in FIG. 1, an audio signal input manually from a microphone (2) is encoded by an audio codec (8), and is converted into serial data into an audio packet section (10) of a PAD section (7).
0).

And audio bucket!・The audio data input to the section (100) is converted into parallel data by the codec interface section (104), and then stored in the data memory (103).
The data is transferred according to the control program stored in the program memory (102).

The audio data stored in the data memory (103) is
In the X, 25 level 3 process shown in Figure 3, the data is divided into a certain length, a packet header is added, and the data is sent to the line control unit (300) via the bus interface unit (105) as audio packet data. be transferred.

Similarly, the image signal from the camera (4) is encoded by the image codec (9), and the image data is encoded by the image bucket unit (20).
At step 0), the encoded image data is divided into pieces of fixed data length, a packet header etc. are added, and the image data is sent to the bus interface unit (205).
The data is then transferred to the line control section (300).

Audio packet data (packetized as shown in 2)
400a) and image packet data (400b) are transferred to the line control unit (300) in a time-division manner as shown in FIG. 2 via the data bus (400)-1-.

Then, in the line control unit (300), audio packet data (400a) and image packet data (400b)
are multiplexed as multiple packets, X, 25 level 2 processing is performed by CI'U (301) and program memory (30
2) and sent to the line (6) via the line control unit (306).

On the other hand, the multiplexed packet data received via the line (6) is separated into voice packet data and image packet data in the 1-1 line jill rR section, and the packet data is returned along the route described in the description. Decomposition and data decoding are performed and output to the speaker (3) and monitor television (5), respectively.

In the embodiment described in J-1, the audio packet section (100), image packet section (200), and line control section (300) have a processing configuration under program control by a single CPU, but the internal processing of each The configuration is divided into two processes, one for data transfer and one for X, 25 level 3 processing.
A similar effect can be obtained even if the distributed processing is performed by providing two U's.

[Effects of the Invention] As described above, according to the present invention, there is provided an audio packet section and an image packet section that separately packetize audio encoded data and image encoded data, and each packet-processed data. Since the packets are multiplexed in the tfA1;l&II1 section and the multiplexed packets are sent out to the line, there is an effect that the packet processing capacity is improved.

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a packet communication video conference terminal according to an embodiment of the present invention, Fig. 2 is a diagram showing how audio packets and image packets are multiplexed on a data bus, and Fig. 3 4 is an explanatory diagram of the positioning of protocol X and 25 processing, FIG. 4 is a block diagram of a conventional packet communication television conference terminal, and FIG. 5 is an explanatory diagram of conventional packet data. In the figure, (1) is a packet communication video conference terminal, (
2) is a microphone, (3) is a speaker, (4) is a camera, (
5) is monitor TV, (6) is line, (7) is Ij A
In the D section, (8) is an audio codec, (9) is an image codec, (100) is an audio kerato section, (200) is an image bucket section, and (300) is a line control section. In addition, in the figures, the same reference numerals indicate the same or equivalent parts. Agent: Masuo Oiwa, patent attorney (and 2 others)

Claims (1)

[Claims] A packet communication video conference for conducting a video conference using packet communication, including an audio codec unit that encodes and decodes audio data, and an image codec unit that encodes and decodes image data. In the terminal, there is an audio packet unit that assembles packets of audio encoded data output from the audio codec unit to generate audio packet data, and disassembles received audio packet data, and an audio packet unit that assembles packets of audio encoded data output from the audio codec unit, and an audio packet unit that decomposes received audio packet data, and an image output from the image codec unit. An image packet unit assembles packets of encoded data to generate image packet data, and decomposes received image packet data, respectively; and multiplexes the packet data sent from the audio packet unit and the image packet unit to generate multiple packets. a line control unit that generates data and sends it to the line, separates multiplexed packet data received via the line into audio packets and image packets, and sends them to the audio packet section and the image packet section, respectively; the audio packet section; A packet communication television conference terminal comprising a data bus that connects an image packet section and a line control section.