KR970063210A - How to adjust the speed / pitch of video and audio signals - Google Patents

How to adjust the speed / pitch of video and audio signals Download PDF

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Publication number
KR970063210A
KR970063210A KR1019960002564A KR19960002564A KR970063210A KR 970063210 A KR970063210 A KR 970063210A KR 1019960002564 A KR1019960002564 A KR 1019960002564A KR 19960002564 A KR19960002564 A KR 19960002564A KR 970063210 A KR970063210 A KR 970063210A
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KR
South Korea
Prior art keywords
audio
mpeg
controlling
speed
variable
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KR1019960002564A
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Korean (ko)
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KR100195938B1 (en
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김영기
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구자홍
Lg 전자주식회사
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Priority to KR1019960002564A priority Critical patent/KR100195938B1/en
Publication of KR970063210A publication Critical patent/KR970063210A/en
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Publication of KR100195938B1 publication Critical patent/KR100195938B1/en

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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10481—Improvement or modification of read or write signals optimisation methods
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B20/00—Signal processing not specific to the method of recording or reproducing; Circuits therefor
    • G11B20/10—Digital recording or reproducing
    • G11B20/10009—Improvement or modification of read or write signals
    • G11B20/10037—A/D conversion, D/A conversion, sampling, slicing and digital quantisation or adjusting parameters thereof

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Television Signal Processing For Recording (AREA)

Abstract

본 발명은 CD 디스크의 회전 속도를 가/감시키는 경우 영상과 음성의 언바란스를 매칭시켜 주기 위한 영상 및 음성 신호의 속도/음정 조정 방법에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a speed / pitch adjustment method for video and audio signals to match the unbalance between video and audio when the rotational speed of a CD disk is increased / decreased.

이러한 본 발명은 키입력부를 통해 디스크 재생 속도 가변 신호가 입력되면 클릭 발생기를 제어하여 디스크 회전 속도 가변을 위한 발진주파수를 가변하고 MPEG 오디오/비디오 디코더의 출력을 제어하는 MPEG마이콤으로 디스크 재생속도 가변임을 알리는 제1과정과; 클럭 발생기의 발진 주파수에 따라 디지탈 신호 처리 및 서보부를 제어하여 디스크의 회전 속도를 가변하는 제2과정과; 디지탈 신호처리 및 서보부에서 처리된 가변된 속도로 재생된 신호를 MPEG 오디오/비디오 디코더로 인가하여 오디오/비디오 데이타로 디코딩한 후 각각의 외부 램에 저장토록 제어하는 제3과정과; 시디 마이콤에서 상기 MPEG 마이콤으로 인가된 디스크 재생 속도 가변임을 알리는 신호 입력에 따라 상기 MPEG 마이콤에서 MPEG 오디오 램의 오디오 출력 속도를 제어하는 제4과정과; MPEG 오디오 램의 오디오 출력에 매칭되도록 상기 MPEG 마이콤으로 MPEG 비디오 램의 출력 화면비를 제어하는 제5과정을 순차 실행시키게 된다.In the present invention, when a disc playback rate variable signal is input through a key input unit, the disc playback rate is variable by an MPEG microcomputer controlling the click generator to vary the oscillation frequency for varying the disc rotation speed and controlling the output of the MPEG audio / A first step of informing; A second step of controlling the digital signal processing and the servo unit according to the oscillation frequency of the clock generator to vary the rotation speed of the disk; A third step of applying digital signal processing and a signal reproduced at a variable speed processed by the servo unit to an MPEG audio / video decoder to decode the audio / video data and storing the decoded audio / video data in each external RAM; A fourth step of controlling an audio output speed of the MPEG audio RAM in the MPEG microcomputer in accordance with a signal input from the CDMA to inform that the disc playback speed is variable; And a fifth step of controlling the output aspect ratio of the MPEG video RAM with the MPEG microcomputer so as to match the audio output of the MPEG audio RAM.

Description

영상 및 음성 신호의 속도/음정 조정 방법How to adjust the speed / pitch of video and audio signals

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

제2도는 본 발명이 적용되는 영상/음성 시스템 블럭 구성도.FIG. 2 is a block diagram of a video / audio system block to which the present invention is applied; FIG.

제3도는 본 발명의 속도/음정 조정 타이밍도.FIG. 3 is a timing diagram of the speed / pitch adjustment of the present invention. FIG.

제4도는 본 발명에 의한 영상/음성 신호의 속도/음정 조정 과정 흐름도.FIG. 4 is a flow chart of a speed / pitch adjustment process of a video / audio signal according to the present invention; FIG.

Claims (2)

키입력부를 통해 디스크 재생 속도 가변 신호가 입력되면 클릭 발생기를 제어하여 디스크 회전 속도 가변을 위한 발진주파수를 가변하고 MPEG 오디오/비디오 디코더의 출력을 제어하는 MPEG 마이콤으로 디스크 재생속도 가변임을 알리는 제1과정과; 상기 클럭 발생기의 발진 주파수에 따라 디지탈 신호 처리 및 서보부를 제어하여 디스크의 회전 속도를 가변하는 제2과정과; 상기 디지탈 신호처리 및 서보부에서 처리된 가변된 속도로 재생된 신호를 MPEG 오디오/비디오 디코더로 인가하여 오디오/비디오 데이타로 디코딩한 후 각각의 외부램에 저장토록 제어하는 제3과정과; 시디 마이콤에서 상기 MPEG 마이콤으로 인가된 디스크 재생 속도 가변임을 알리는 신호 입력에 따라 상기 MPEG 마이콤으로 MPEG 오디오 램의 오디오 출력 속도를 제어하는 제4과정과; 상기 MPEG 오디오 램의 오디오 출력에 매칭되도록 상기 MPEG 마이콤이 MPEG 비디오램의 출력 화면비를 제어 하는 제5과정으로 이루어짐을 특징으로 하는 영상 및 음성 신호의 속도/음정 조정 방법.A first step of informing that a disc reproducing speed variable is variable by an MPEG microcomputer for controlling an output of the MPEG audio / video decoder by controlling an oscillation frequency for controlling a disc rotation speed by controlling a click generator when a disc reproducing speed variable signal is inputted through a key input unit and; A second step of controlling the digital signal processing and the servo unit according to the oscillation frequency of the clock generator to vary the rotation speed of the disk; A third step of applying a signal reproduced at the variable speed processed by the digital signal processing and servo unit to the MPEG audio / video decoder to decode the audio / video data and storing the decoded audio / video data in each external RAM; A fourth step of controlling an audio output speed of the MPEG audio RAM by the MPEG microcomputer in accordance with a signal input indicating that the disc playback speed is variable by the MPEG microcomputer; And controlling an output aspect ratio of the MPEG video RAM to match the audio output of the MPEG audio RAM. 제1항에 있어서, 상기 클럭 발생기에서의 발진 주파수 가변 범위는 정속도 재생의 -50- +25% 범위인 것을 특징으로 하는 영상 및 음성 신호의 속도/음성 조정 방법.The method of claim 1, wherein the oscillation frequency variable range of the clock generator is in a range of -50- + 25% of the constant speed reproduction. ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is disclosed by the contents of the first application.
KR1019960002564A 1996-02-02 1996-02-02 Speed/tone control method for audio and video signal KR100195938B1 (en)

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KR1019960002564A KR100195938B1 (en) 1996-02-02 1996-02-02 Speed/tone control method for audio and video signal

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Application Number Priority Date Filing Date Title
KR1019960002564A KR100195938B1 (en) 1996-02-02 1996-02-02 Speed/tone control method for audio and video signal

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KR970063210A true KR970063210A (en) 1997-09-12
KR100195938B1 KR100195938B1 (en) 1999-06-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100275882B1 (en) * 1997-10-14 2000-12-15 구자홍 Method of tempo control for vcd player

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100275882B1 (en) * 1997-10-14 2000-12-15 구자홍 Method of tempo control for vcd player

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