KR19980084707A - Video Conferencing System Using Asynchronous Transfer Mode (ATM) Network - Google Patents

Abstract

The present invention relates to a video conferencing system using an ATM network that allows video conferencing to be performed by transmitting and receiving video, audio, audio and data between two-way remote locations using an asynchronous transmission mode (ATM) network. After encoding and multiplexing the output video image data or audio and audio data, packetizing them and sending them to the other party through the ATM network. On the contrary, after decomposing and demultiplexing the packet data input through another ATM network or SCSI bus. By reconstructing video image data or audio and audio data through the input / output device by decoding, video conferencing can be performed in real time between two-way remote sites, and a video conferencing system provided in a broadband integrated information communication network can be implemented using an ATM network. have.

Description

Video Conferencing System Using Asynchronous Transfer Mode (ATM) Network

The present invention provides an image using an ATM network that allows video conferencing to be performed by transmitting and receiving video, audio, and data between two-way remote locations using an Asynchronous Transfer Mode (hereinafter, referred to as ATM) network. It is about a conference system.

In general, a video conferencing system is a system in which video, audio, and data are transmitted from distant places to conduct a meeting while looking at the face of the other person on the screen. It is a system that can make decisions quickly and contribute greatly to maximization and efficiency of corporate activities.

Such a video conferencing system is composed of interface devices such as a camera, a monitor, a microphone, and a speaker, and an interactive video and audio transmission path connecting them to each other. This is accomplished through the Broadband-Intergrated Services Digital Network (B-ISDN).

However, recently, ATM technology, which is an important technology, has emerged as a core technology for integrating and accommodating various broadband services in a broadband integrated information communication network. Therefore, there is a need to provide an integrated communication service such as a video conference system.

Accordingly, the present invention has been made in view of the above, the object of the present invention is to send a video image, audio, audio and data to a remote location including a short distance by using an ATM network to proceed with the meeting while watching the face of the other person reflected on the screen To provide a video conferencing system using an ATM network.

The video conferencing system using the ATM network of the present invention for achieving the above object is to transmit the video video data or the audio and audio data output through the input and output device to the other meeting participants through the ATM network by encoding and multiplexing the packet. On the contrary, video conferencing is performed in real time between two-way remote sites by decomposing, demultiplexing, and decoding packet data input through another ATM network or SCSI bus to restore video image data or audio and voice data through an input / output device. It can be characterized by.

1 is a block diagram of a video conferencing system using an asynchronous transmission mode (ATM) network according to the present invention.

Explanation of symbols on the main parts of the drawings

10: input and output device 20: terminal for video conference

30: video / audio data control unit 40: video multi-window control unit

50: encoding / decoding section 60: multiplexer / demultiplexer

70: Assembler / Disassembler

Hereinafter, with reference to the accompanying drawings will be described in detail the configuration and operation of the video conferencing system using the ATM network according to the present invention.

1 is a block diagram of a video conferencing system using an ATM network according to the present invention, which is composed of a video camera, a microphone, a speaker, a scanner, a telewriter, and the like. Input / output device 10 for outputting video image data or audio / audio data by video camera, microphone, scanner, telelite, and outputting audio data as audio / audio signal through microphone, monitor, mouse, printer, etc. It is configured to output video image data or audio and audio data for video conferencing through a small computer system interface (SCSI) bus, and output video data or subscriber status of another ATM network as a video image signal through a monitor screen. In the video conferencing terminal 20 and the input / output device 10 or the video conferencing terminal 20 A video / audio data control unit 30 for controlling and outputting output video data or audio data, and outputting decoded and input audio data to the input / output device 10 and for each subscriber input through the SCSI bus. A video multiwindow controller 40 for displaying the video data or the decoded input video data in various windows on the screen so that the status of the subscriber can be viewed, and the video / audio data controller 30 is output. The video / audio data control unit 30 encodes and outputs video / audio data, decodes the decoded video data, and outputs the decoded video data to the video multi-window control unit 40. Encoding / decoding section 50 output to A multiplexer / demultiplexer 60 which multiplexes and outputs the encoded data output from the coding / decoding section 50, and demultiplexes the input data and outputs the output to the encoding / decoding section 50; Assembler / packet multiplexed data output from the multiplexer / demultiplexer 60 to output to the ATM network, decomposes packet data input through the ATM network or SCSI bus and outputs to the multiplexer / demultiplexer 60 It consists of a disassembler / disassembler 70.

Referring to the operation of the video conferencing system using the ATM network according to the present invention configured as described above are as follows.

First, in case of outputting video image data or audio / audio data through the corresponding input device in the input / output device 10 including a video camera, a microphone, a speaker, a scanner, a telelight, or the videoconferencing terminal 20, the output video is output. Data or audio data is input to the video / audio data controller 30.

Then, the video / audio data control unit 30 controls the input video data or audio data and outputs them to the encoding / decoding unit 50 so that video conferencing with subscribers of other ATM networks can be performed.

On the other hand, when audio data is input through the video / audio data controller 30, the audio / audio signal of the other party is output through the output device of the input / output device 10, that is, the speaker.

At this time, as the video / audio data control unit 30 provides an audio mixing function, two participants can speak simultaneously and proceed with the meeting.

The video / audio data controller 30 may output video data output from the input / output device 10 to the monitor screen of the videoconferencing terminal through RS232C.

On the other hand, the video multi-window control unit 40 displays the status of the subscriber input via the SCSI bus or the decoded video data on the monitor screen of the videoconferencing terminal 20 in several windows so that the subscribers who are the participants in the conference are mutually opposed. Allows you to proceed with the meeting while looking at the status of.

Subsequently, the video or audio data output from the video / audio data controller 30 is encoded through the video encoder 51 and the audio encoder 53 of the encoding / decoding unit 50 and output to the multiplexer / demultiplexer 60. do.

On the other hand, video or audio data demultiplexed by the multiplexer / demultiplexer 60 and input to the encoding / decoding unit 50 is decoded through the video decoder 52 and the audio decoder 54.

In this case, when the decoded data is video data, the decoded data is output to the video multi-window control unit 40 and output to the monitor screen of the videoconferencing terminal 20. In the case of audio data, the video / audio data control unit 30 ) Is output as an audio audio signal through a corresponding output device of the input / output device 10, for example, a speaker.

Subsequently, the video data or audio data encoded by the encoding / decoding unit 50 is input to the multiplexer / demultiplexer 60 and multiplexed, and then output to the assembler / disassembler 70. Then, the assembler / disassembler 70 is transferred. Multiplexed video or audio data is packetized and output to other ATM networks for receiving by other subscribers.

On the other hand, when video or audio packet data is input to the assembler / disassembler 70 through an ATM network or a SCSI bus, the packet data is decomposed and output to the multiplexer / demultiplexer 60 to be demultiplexed, and then the encoding / decoding unit Decoded by the video decoder 52 and the audio decoder 54 in the 50 to be output to the respective video / audio data control unit 30 or the video multi-window control unit 40.

As described above, the present invention has an effect that it is possible to implement a video conferencing system provided in a broadband comprehensive information communication network using an ATM network.

Claims (1)

Outputting video image data or audio and audio data, and outputting input and output audio data as audio and audio signals, and outputting video image data and audio and audio data for a video conference via a SCSI bus, Video conferencing terminal 20 for outputting video data or a subscriber's state of another ATM network as a video image signal through a monitor screen, and video data or audio data output from the input / output device 10 or video conferencing terminal 20. And a video / audio data control unit 30 for outputting the decoded and inputted audio data to the input / output device 10 and the video data for each subscriber inputted through the SCSI bus or decoded. Display video data in several windows on the screen to view the status of subscribers. The video multi-window control unit 40 to lock the video / audio data output from the video / audio data control unit 30 and the video / window data control unit 30 to decode and decode the input video data. The encoding / decoding unit 50 for decoding the demultiplexed audio data and outputting the decoded audio data to the video / audio data control unit 30 and the encoded data output from the encoding / decoding unit 50. The multiplexer / demultiplexer 60 outputs the multiplexed output, demultiplexes the input data to the encoding / decoding unit 50, and packetizes the multiplexed data output from the multiplexer / demultiplexer 60 into an ATM network. Outputs and decompresses the packet data input through the ATM network or the SCSI bus to the multiplexer / demultiplexer 60. A video conferencing system using an asynchronous transmission mode (ATM) network, characterized in that consisting of a assembler / disassembler (70).