KR960011958A - Optical Disc Player - Google Patents

Optical Disc Player Download PDF

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Publication number
KR960011958A
KR960011958A KR1019940025090A KR19940025090A KR960011958A KR 960011958 A KR960011958 A KR 960011958A KR 1019940025090 A KR1019940025090 A KR 1019940025090A KR 19940025090 A KR19940025090 A KR 19940025090A KR 960011958 A KR960011958 A KR 960011958A
Authority
KR
South Korea
Prior art keywords
light
reproduction
output
optical disc
clock
Prior art date
Application number
KR1019940025090A
Other languages
Korean (ko)
Other versions
KR100243183B1 (en
Inventor
양창진
Original Assignee
김광호
삼성전자 주식회사
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Application filed by 김광호, 삼성전자 주식회사 filed Critical 김광호
Priority to KR1019940025090A priority Critical patent/KR100243183B1/en
Publication of KR960011958A publication Critical patent/KR960011958A/en
Application granted granted Critical
Publication of KR100243183B1 publication Critical patent/KR100243183B1/en

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Classifications

    • 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
    • G11B20/10222—Improvement or modification of read or write signals clock-related aspects, e.g. phase or frequency adjustment or bit synchronisation
    • G11B20/1024—Improvement or modification of read or write signals clock-related aspects, e.g. phase or frequency adjustment or bit synchronisation wherein a phase-locked loop [PLL] is used
    • 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
    • G11B20/10046—Improvement or modification of read or write signals filtering or equalising, e.g. setting the tap weights of an FIR filter
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B2220/00—Record carriers by type
    • G11B2220/20—Disc-shaped record carriers
    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
    • G11B2220/2537—Optical discs
    • G11B2220/2545—CDs

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

본 발명은 광디스크 재생장치에 관한 것으로 특히, 본 발명의 장치는 광디스트 표면에 소정의 재생광을 조사하는 광원; 광디스크 표면에서 반사된 광을 전기신호로 변환하는 수광수단; 상기 수광수단의 출력을 소정 크기로 증폭하는 증폭수단; 상기 증폭수단의 출력을 보정하여 데이타 패턴에 따른 신호간의 간섭을 줄이며, 재생신호를 등화시키는 등화수단; 상기 증폭수단의 출력과 상기 등화수단의 출력을 입력하여 위상이 동기된 재생클럭을 생성하는 재생클럭발생수단; 상기 등화수단의 출력과 상기 재생클럭을 입력하여 광디스크에 기록된 데이타를 복원하는 복원수단; 상기 재생클럭을 소정시간 지연하는 지연수단; 및 상기 광디스크 표면에 입사되는 재생광이 상기 지연된 재생클럭에 따라 변조되도록 상기 광원을 구동하는 구동수단을 구비한 것을 특징으로 한다. 따라서, 본 발명은 광디스크에 조사되는 재생광량의 크기를 기록데이타 중앙에서는 크게 하고 기록데이타 사이에서는 작게 변조함으로써 데이타 패턴에 따른 재생신호간의 간섭을 줄일 수 있다.The present invention relates to an optical disc reproducing apparatus, and more particularly, to an apparatus of the present invention, comprising: a light source for irradiating predetermined reproduction light onto a surface of an optical disc; Light receiving means for converting light reflected from the surface of the optical disk into an electrical signal; Amplifying means for amplifying the output of the light receiving means to a predetermined size; Equalizing means for correcting an output of the amplifying means to reduce interference between signals according to data patterns and equalizing a reproduction signal; Regeneration clock generation means for inputting an output of the amplification means and an output of the equalization means to generate a regeneration clock whose phase is synchronized; Restoring means for restoring data recorded on the optical disc by inputting the output of the equalizing means and the reproduction clock; Delay means for delaying the regeneration clock for a predetermined time; And driving means for driving the light source so that reproduction light incident on the surface of the optical disc is modulated according to the delayed reproduction clock. Therefore, the present invention can reduce the interference between the reproduction signals according to the data patterns by increasing the amount of reproduction light irradiated to the optical disc at the center of the recording data and making the modulation smaller between the recording data.

Description

광디스크 재생장치Optical Disc Player

본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음As this is a public information case, the full text was not included.

제5도는 본 발명에 의한 광자기 디스크 재생장치의 블럭도, 제6A도와 제6B도는 본 발명에 의한 광자기 디스크 재생장치에서의 각부 파형도.Fig. 5 is a block diagram of the magneto-optical disk reproducing apparatus according to the present invention.

Claims (3)

광디스크 표면에 소정의 재생광을 조사하는 광원; 상기 광디스크 표면에서 반사된 광을 수광하여 고주파신호로 변환하는 수광수단; 상기 수광수단에서 출력된 고주파신호를 보정하여 데이타 패턴에 따른 신호간의 간섭을 줄이며, 상기 고주파신호를 등화시키는 등화수단; 상기 수광수단에서 출력된 고주파신호와 상기 등화수단의 출력을 입력하여 위상이 동기된 재생클럭을 생성하는 재생클럭발생수단; 상기 등화수단의 출력과 상기 재생클럭발생수단에서 출력된 재생클럭을 입력하여 상기 광디스크에 기록된 데이타를 복원하는 복원수단; 상기 디스크에 조사되는 재생광량의 펄스가 상기 디스크에 기록된 데이타의 중앙에 조사되도록 상기 재생클럭을 소정시간 지연시키는 지연수단; 및 상기 디스크의 기록데이타 중앙에서는 재생광량을 크게 하고 상기 디스크의 기록데이타 사이에서는 재생광량을 작게 하기 위하여, 상기 광디스크 표면에 입사되는 재생광이 상기 지연된 재생 클럭에 따라 변조되도록 상기 광원을 구동하는 구동수단을 구비한 것을 특징으로 하는 광디스크 재생장치.A light source for irradiating predetermined reproduction light onto the surface of the optical disc; Light-receiving means for receiving light reflected from the surface of the optical disk and converting the light into a high frequency signal; Equalization means for correcting the high frequency signal output from the light receiving means to reduce interference between signals according to data patterns and equalizing the high frequency signal; Regeneration clock generation means for inputting a high frequency signal output from the light receiving means and an output of the equalization means to generate a regeneration clock in phase synchronization; Restoring means for restoring data recorded on the optical disk by inputting the output of the equalizing means and the playing clock outputted from the playing clock generating means; Delay means for delaying the reproduction clock for a predetermined time so that a pulse of the amount of reproduction light irradiated onto the disc is irradiated to the center of data recorded on the disc; And driving the light source so that the reproduction light incident on the surface of the optical disc is modulated according to the delayed reproduction clock in order to increase the amount of reproduction light at the center of the recording data of the disc and to reduce the amount of reproduction light between the recording data of the disc. An optical disc reproducing apparatus comprising a means. 제1항에 있어서, 상기 재생클럭발생수단은 상기 증폭수단의 출력을 입력하여 섹터마크를 검출하는 섹터마크검출기와, 상기 등화기에서 출력된 재생신호와 상기 섹터마크검출기의 출력을 입력하여 위상이 동기된 재생클럭을 출력하는 위상제어루프(PLL)로 구성된 것을 특징으로 하는광디스크 재생장치.2. The apparatus of claim 1, wherein the reproduction clock generating means inputs an output of the amplifying means to detect a sector mark, and inputs a reproduction signal outputted from the equalizer and an output of the sector mark detector to change phase. And a phase control loop (PLL) for outputting a synchronized playback clock. 제1항에 있어서, 상기 광원은 전기신호를 광(beam)으로 변환하는 발광소자(LD)와 상기 발광소자(LD)에서 발생된 광(beam)을 변조시키는 광변조기로 구성된 것을 특징으로 하는 광디스크 재생장치.The optical disc of claim 1, wherein the light source comprises a light emitting element LD for converting an electrical signal into a light and an optical modulator for modulating light generated in the light emitting element LD. Playback device. ※참고사항 : 최초출원 내용에 의하여 공개하는 것임.※ Note: It is to be disclosed based on the initial application.
KR1019940025090A 1994-09-30 1994-09-30 Optical disc reproducer KR100243183B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1019940025090A KR100243183B1 (en) 1994-09-30 1994-09-30 Optical disc reproducer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1019940025090A KR100243183B1 (en) 1994-09-30 1994-09-30 Optical disc reproducer

Publications (2)

Publication Number Publication Date
KR960011958A true KR960011958A (en) 1996-04-20
KR100243183B1 KR100243183B1 (en) 2000-02-01

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Application Number Title Priority Date Filing Date
KR1019940025090A KR100243183B1 (en) 1994-09-30 1994-09-30 Optical disc reproducer

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KR100243183B1 (en) 2000-02-01

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