KR970060156A

KR970060156A - Synchronizing device of disc player

Info

Publication number: KR970060156A
Application number: KR1019960000110A
Authority: KR
Inventors: 이명문
Original assignee: 구자홍; Lg 전자주식회사
Priority date: 1996-01-05
Filing date: 1996-01-05
Publication date: 1997-08-12

Abstract

본 발명은 디스크 재생기의 동기 조정 장치에 관한 것으로, 종래에는 디스크의 장시간 재생을 위하여 비트스트림을 가변 비트율로 엠코딩하여 기록하므로 디코더측에서 시스템 클럭의 복구를 위한 클럭 생성 정보(SCR)의 값을 정확히 구하여 주기적으로 삽입하는 것이 불가능한 문제점이 있고 또한, 가변 비트율로 기록된 디스크를 재생할 경우 비트 스트림을 읽어들이는 동작은 디코더측의 버퍼 레벨에 따라 제어하므로 시스템 클럭(STC)을 정확히 복구할 필요가 없다. 이러한 점을 감안하여 본 발명은 시스템 클럭(STC)의 복구없이 오디오 및 비디오 재현 정보(PTS)를 비교함에 의해 비디오 복호 동작을 제어함으로써 오디오와 비디오의 동기를 일치시키도록 창안한 것으로, 본 발명은 시스템 클럭(STC)의 복구없이 재현 정보(PST)만을 사용하여 오디오와 비디오의 동기를 맞출 수 있고 또한, 외부클럭의 제어와 같은 아날로그 구성 요소를 제거하여 디지탈화함으로써 잡음의 영향을 최소화할 수 있다.The present invention relates to a synchronizing device for a disc player, and in the related art, a bit stream is recorded in a variable bit rate in order to reproduce a disc for a long time, so that the value of the clock generating information (SCR) (STC), it is necessary to accurately recover the system clock (STC) because the operation of reading the bit stream is controlled according to the buffer level of the decoder side when reproducing the disc recorded at the variable bit rate none. In view of this, the present invention is designed to synchronize audio and video by controlling video decoding operations by comparing audio and video reproduction information (PTS) without restoring the system clock (STC) It is possible to synchronize audio and video using only reproduction information (PST) without restoring the system clock (STC), and also to minimize the influence of noise by eliminating and digitizing analog components such as control of an external clock.

Description

Synchronizing device of disc player

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음Since this is a trivial issue, I did not include the contents of the text.

제3도는 제1도에서 시스템 디코더의 일부 구성도.Figure 3 is a partial schematic diagram of the system decoder in Figure 1;

제4도는 제1도에서 비디오 디코더의 내부 메모리 상태도.FIG. 4 is an internal memory state diagram of the video decoder in FIG.

제5도는 본 발명에 따른 디스크 재생기의 동기 조정 장치의 블럭도.FIG. 5 is a block diagram of a synchronizing device of a disk player according to the present invention; FIG.

Claims

Audio information extracting means for extracting the number of audio frames (A-NUM) and reproduction information (A-PTS) from the packet stream and output data (A-NUM) (A-PTS) of the information calculation means is stored in the first memory means and the audio frame is decoded in the audio decoding means, An audio memory control means for sequentially reading and outputting the stored information of the first memory means each time it is decoded; video information extraction means for extracting video reproduction information (V-PTS) from the packet stream; (V-PTS) is stored in the first memory means, and each time the video image is decoded by the video decoding means, the video memo (V-PTS) of the video memory control means and the output information (A-PTS) of the audio memory control means to the video decoding control means for controlling the operation of the video decoding means And the synchronizing adjustment device of the disc player.

The video decoding apparatus according to claim 1, wherein the video decoding control means outputs a skip instruction (SKIP) if the value of the video reproduction information (V-PTS) is smaller than a value of the audio reproduction information (A- (PAUSE) is outputted to the disc reproducing apparatus.

※ Note: It is disclosed by the contents of the first application.