KR890005714A - 데이타 재생장치 - Google Patents

데이타 재생장치 Download PDF

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Publication number
KR890005714A
KR890005714A KR1019880012713A KR880012713A KR890005714A KR 890005714 A KR890005714 A KR 890005714A KR 1019880012713 A KR1019880012713 A KR 1019880012713A KR 880012713 A KR880012713 A KR 880012713A KR 890005714 A KR890005714 A KR 890005714A
Authority
KR
South Korea
Prior art keywords
frequency
recording
clock signal
reproduction
reproduction clock
Prior art date
Application number
KR1019880012713A
Other languages
English (en)
Inventor
노보루 무라바야시
게이지 가노따
Original Assignee
오오가 노리오
소니 가부시끼 가이샤
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 오오가 노리오, 소니 가부시끼 가이샤 filed Critical 오오가 노리오
Publication of KR890005714A publication Critical patent/KR890005714A/ko
Priority to KR2019970029523U priority Critical patent/KR200175746Y1/ko

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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
    • G11B20/02—Analogue recording or reproducing
    • G11B20/06—Angle-modulation recording or reproducing
    • 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
    • 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
    • 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
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1407—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol
    • G11B20/1419—Digital recording or reproducing using self-clocking codes characterised by the use of two levels code representation depending on a single bit, i.e. where a one is always represented by a first code symbol while a zero is always represented by a second code symbol to or from biphase level coding, i.e. to or from codes where a one is coded as a transition from a high to a low level during the middle of a bit cell and a zero is encoded as a transition from a low to a high level during the middle of a bit cell or vice versa, e.g. split phase code, Manchester code conversion to or from biphase space or mark coding, i.e. to or from codes where there is a transition at the beginning of every bit cell and a one has no second transition and a zero has a second transition one half of a bit period later or vice versa, e.g. double frequency code, FM code
    • 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
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
    • G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof
    • 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
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • 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
    • G11B20/14—Digital recording or reproducing using self-clocking codes
    • G11B20/1403—Digital recording or reproducing using self-clocking codes characterised by the use of two levels
    • G11B20/1423—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code
    • G11B20/1426—Code representation depending on subsequent bits, e.g. delay modulation, double density code, Miller code conversion to or from block codes or representations thereof
    • G11B2020/1438—8 to 10 modulation

Landscapes

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

Abstract

내용 없음

Description

데이타 재생장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 제1의 실시예를 도시하는 블럭도.
제2도는 본 발명의 제2의 실시예를 도시하는 블럭도.
제3도는 주파수 전압변환 회로의 특성을 도시하는 특성 곡선도.

Claims (3)

  1. 자기기록 매체상의 서로 기록밀도가 상이한 제1 또는 제2의 기록변조 방식으로 기록된 디지탈 데이타를 재생 헤드를 써서 픽업하고, 해당 픽업 출력에 포함되는 클럭성분으로 부터, 위상 고정루프 회로 구성인 클럭 재생회로를 써서 재생 클럭신호를 얻고, 해당 재생클럭에 기준해서 상기 픽업 출력을 복조해서 상기 디지탈 데이타를 얻는 데이타 재상장치에 있어서, 상기 재생 클럭신호의 주파수를 판별해서, 재생중의 상기 자기기록 매체상에 기록된 상기 제1 또는 제2의 기록변조 방식을 검출하는 검출수단을 구비하는 것을 특징으로 하는 데이타 재생장치.
  2. 제1항에 있어서, 상기 검출수단은 상기 재생 클럭신호에 기준하는 비교신호 및 상기 제1 또는 제2의 기록변조 방식인 상기 재생 클럭신호의 주파수에 기준하는 표준 주파수 신호간의 주파수를 비교하고, 해당 비교결과를 사용해서 상기 제1 또는 제2의 기록변조 방식을 검출하는 것을 특징으로 하는 데이타 재생장치.
  3. 제1항에 있어서, 상기 검출수단은, 상기 재생 클럭신호의 주파수에 따른 비교전압과, 상기 제1 또는 제2의 기록변조 방식인 상기 재생 클럭신호의 주파수에 대응한 제1 또는 제2의 전압간의 소정의 기준 전압과를 비교하고, 해당 비교결과를 써서 상기 제1 또는 제2의 기록변조 방식을 검출하는 것을 특징으로 하는 데이타 재생장치.
    ※ 참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019880012713A 1987-09-30 1988-09-30 데이타 재생장치 KR890005714A (ko)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR2019970029523U KR200175746Y1 (ko) 1987-09-30 1997-10-24 데이타 재생 장치

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP62246916A JP2661064B2 (ja) 1987-09-30 1987-09-30 データ再生装置
JP62-246916 1987-09-30

Related Child Applications (1)

Application Number Title Priority Date Filing Date
KR2019970029523U Division KR200175746Y1 (ko) 1987-09-30 1997-10-24 데이타 재생 장치

Publications (1)

Publication Number Publication Date
KR890005714A true KR890005714A (ko) 1989-05-16

Family

ID=17155659

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019880012713A KR890005714A (ko) 1987-09-30 1988-09-30 데이타 재생장치

Country Status (6)

Country Link
US (1) US4912573A (ko)
EP (1) EP0310442B1 (ko)
JP (1) JP2661064B2 (ko)
KR (1) KR890005714A (ko)
AT (1) ATE118639T1 (ko)
DE (1) DE3853037T2 (ko)

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2819294B2 (ja) * 1988-09-29 1998-10-30 キヤノン株式会社 デジタル情報再生装置
JP3347468B2 (ja) * 1994-04-20 2002-11-20 キヤノン株式会社 情報再生装置
JPH07312041A (ja) * 1994-05-17 1995-11-28 Sony Corp ディジタル信号再生装置
US6894858B1 (en) * 2002-08-06 2005-05-17 Storage Technology Corporation Read equalizer optimization based on the PTR effects to write equalization
US8312310B2 (en) * 2007-05-01 2012-11-13 Canon Kabushiki Kaisha Apparatus and method for changing clock frequency and modulation method based on current state

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3705398A (en) * 1970-08-11 1972-12-05 Odetics Inc Digital format converter
IT1072341B (it) * 1976-05-20 1985-04-10 Olivetti & Co Spa Circuito e metodo per la discriminazione in lettura di dati preregistrati con codici diversi
JPS563421A (en) * 1979-06-21 1981-01-14 Canon Inc Signal converting device
US4365210A (en) * 1980-06-26 1982-12-21 Motorola, Inc. Data and clock recovery system having a phase-locked-loop and which controls dynamic loop response of a data stream of unknown data format
CA1161946A (en) * 1980-07-26 1984-02-07 Sony Corporation Method and apparatus for recording digitized information on a record medium
DE3046660A1 (de) * 1980-12-11 1982-07-15 Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt Digitales speichersystem
JPS5977633A (ja) * 1982-10-26 1984-05-04 Nippon Gakki Seizo Kk デイスク再生装置におけるクロツク再生回路

Also Published As

Publication number Publication date
DE3853037D1 (de) 1995-03-23
EP0310442A2 (en) 1989-04-05
DE3853037T2 (de) 1995-06-14
ATE118639T1 (de) 1995-03-15
JP2661064B2 (ja) 1997-10-08
JPS6489083A (en) 1989-04-03
EP0310442B1 (en) 1995-02-15
EP0310442A3 (en) 1991-06-05
US4912573A (en) 1990-03-27

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