KR940010809A

KR940010809A - Receiving Buffer Device in Video Conference Video Codem System

Info

Publication number: KR940010809A
Application number: KR1019920018914A
Authority: KR
Inventors: 한성택
Original assignee: 정장호; 금성정보통신 주식회사
Priority date: 1992-10-14
Filing date: 1992-10-14
Publication date: 1994-05-26

Abstract

본 발명은 채널 등급에 따라 수신 버퍼 크기를 가변 조절 할 수 있도록 함으로써 버퍼 신호전송 지연 시간을 다측 시켜 신호 전송 속도를 향상 시키도록한 화상회의 비디오 코텍 시스템에서의 수신버퍼 장치에 관한 것이다.The present invention relates to a receiving buffer device in a videoconferencing video codec system that improves signal transmission speed by multiplying a buffer signal transmission delay time by allowing a variable control of a receiving buffer size according to a channel grade.

이를 위하여 본 발명은 수신 버퍼 장치의 크기를 채널 등급에 따라 가변 조절 할 수 있도록 하여 버퍼 지연시간을 최대한 단축 시키고자 한 것이다.To this end, the present invention is intended to shorten the buffer delay time by allowing the size of the receiving buffer device to be adjusted according to the channel grade.

Description

Receiving Buffer Device in Video Conference Video Codem System

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is an open matter, no full text was included.

제1도는 CCITT H.261에 근거한 비도오 코텍 송, 수신 블럭 구성도,1 is a block diagram of a video codec transmission and reception block based on CCITT H.261,

제2도는 본 발명에 따른 수신 버퍼 수단의 블럭 구성도,2 is a block diagram of a receiving buffer means according to the present invention;

제3도는 본 발명에서 수신 버퍼 콘트롤링 수단의 블럭 구성도,3 is a block diagram of a receiving buffer controlling means in the present invention;

제4돈 본 발명에서 채널 등급(Channel Rate)에 따른 수신 버퍼 크기를 나타낸 것으로서, (가)는 채널 등급이 64KbPS*N인 경우, (나)는 채널 등급이 36KbPS*N인 경우이다.Fourth money In the present invention, the receiving buffer size according to the channel rate (Channel Rate), (a) is the case of the channel grade is 64KbPS * N, (b) is the case of the channel grade is 36KbPS * N.

Claims

A plurality of serial / parallel FIFOs (201, ...) are connected between the transmission decoder (1) and the video demodulation decoder (3) forming the videoconferencing video codec receiver to adjust the size of the buffer variably according to the channel grade. A receiving buffer means 20 composed of 20N, a channel grade decoder 301 for decoding a channel grade (CR) input from a channel for controlling the operation of the receiving buffer means 20, and a serial / parallel parallel Receives and receives the output of the reception buffer state determination unit 302 and the channel class decoder 301 and the reception buffer state determination unit 302 for determining the data input state of the FIFOs 201, 20 ... 20N. A data buffer signal VS in the video demodulation decoder 3 and a reception buffer size determiner 303 which determines a buffer size to determine a connection state of a plurality of serial / parallel FIFOs 201,... 20N. The number of receive buffers by receiving a data channel clock (CC) and a system clock (SC); Video conferencing video, characterized in that it comprises a receiving buffer control means 30 composed of a receiving buffer control signal generator 304 for generating a read signal R of 20 and a serial input clock pulse signal SICP. Receiving buffer device in a codem system.

2. The video conference receiving buffer device according to claim 1, wherein the channel grade (CR) input to the channel grade decoder (301) is set to 64 Kbps * N or 56 Kbps * N.

※ Note: The disclosure is based on the initial application.