KR940005846A - 광자기 기록방법과 그의 기록 및 재생장치 - Google Patents

광자기 기록방법과 그의 기록 및 재생장치 Download PDF

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KR940005846A
KR940005846A KR1019930012879A KR930012879A KR940005846A KR 940005846 A KR940005846 A KR 940005846A KR 1019930012879 A KR1019930012879 A KR 1019930012879A KR 930012879 A KR930012879 A KR 930012879A KR 940005846 A KR940005846 A KR 940005846A
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magneto
recording
optical recording
recording medium
clock
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요시히로 쯔까무라
세이지 고바야시
히로시게 오까무라
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오오가 노리오
소니 가부시끼가이샤
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
    • G11B27/031—Electronic editing of digitised analogue information signals, e.g. audio or video signals
    • G11B27/036—Insert-editing
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
    • G11B11/10504—Recording
    • G11B11/1051—Recording by modulating both the magnetic field and the light beam at the transducers
    • G11B11/10513—Recording by modulating both the magnetic field and the light beam at the transducers one of the light beam or the magnetic field being modulated by data and the other by a clock or frequency generator
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    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
    • G11B11/10517—Overwriting or erasing
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    • G11B11/10521—Direct overwriting, i.e. performing erasing and recording using the same transducing means using a single light spot
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    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10502—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed
    • G11B11/1053—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing characterised by the transducing operation to be executed to compensate for the magnetic domain drift or time shift
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B11/00—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor
    • G11B11/10—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field
    • G11B11/105—Recording on or reproducing from the same record carrier wherein for these two operations the methods are covered by different main groups of groups G11B3/00 - G11B7/00 or by different subgroups of group G11B9/00; Record carriers therefor using recording by magnetic means or other means for magnetisation or demagnetisation of a record carrier, e.g. light induced spin magnetisation; Demagnetisation by thermal or stress means in the presence or not of an orienting magnetic field using a beam of light or a magnetic field for recording by change of magnetisation and a beam of light for reproducing, i.e. magneto-optical, e.g. light-induced thermomagnetic recording, spin magnetisation recording, Kerr or Faraday effect reproducing
    • G11B11/10595—Control of operating function
    • 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
    • G11B7/00—Recording or reproducing by optical means, e.g. recording using a thermal beam of optical radiation by modifying optical properties or the physical structure, reproducing using an optical beam at lower power by sensing optical properties; Record carriers therefor
    • 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
    • G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
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    • G11B2220/216—Rewritable discs
    • G—PHYSICS
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    • G11B2220/21—Disc-shaped record carriers characterised in that the disc is of read-only, rewritable, or recordable type
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    • G—PHYSICS
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    • G—PHYSICS
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    • G11B2220/00—Record carriers by type
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    • G11B2220/25—Disc-shaped record carriers characterised in that the disc is based on a specific recording technology
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    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
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    • G11B27/02—Editing, e.g. varying the order of information signals recorded on, or reproduced from, record carriers
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    • G11B27/034—Electronic editing of digitised analogue information signals, e.g. audio or video signals on discs

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  • Optical Recording Or Reproduction (AREA)

Abstract

(목적) 간단한 구성, 또한 작은 에너지로 고밀도인 오러라이트를 가능하게 함과 동시에 간단한 구성으로 고기 록밀도의 데이터를 정확하게 기륵.재생 가능하게 한다.
(구성) 탱크회로(7)를 구성하는 코일(5)에 의해 PLL회로(8)에서 생성한 한 기록 기체클록과 동일한 주파수의 교번자계를 교번시켜, 광자기디스크(1)에 인가된다. 위상 변조 회로(12)에서 기록 기체 클록의 위상을 기록 데이터에 대응하여 변조하여, 펄스 발생 회로(10)에 있어서, 이클록의 오름 엣지 및 내림 엣지에 동기한 펄스를 발생시킨다. 픽업(4)은, 이 펄스에 동기하여 광자기디스크(1)에 레이저광을 조사한다. 이것에 의해, 피트의 엣지 위치를 기록해야 할 데이터에 대응시켜서 스텝 상태로 시프트시킨 고밀도 기록 방법을, 광자기막의 부분적인 자화의 반전에 의해 피트를 형성하는 광자기 기록으로 적용할 수가 있다.

Description

광지기 기록방법과 그의 기록 및 재상장치
본 내용은 요부공개 건이므로 전문내용을 수록하지 않았음
제1도는 본 발명의 광자기 디스크 기록장치의 한 실시예의 구성을 나타내는 블럭도, 제2도는 제1도의 실시예의 동작을 설명하는 타이밍차트, 제3도는 제1도의 실시예에 있어서 1개의 기록 펄스에 의해 형성되는 피트를 설명하는 도면, 제4도는 제1도의 실시예에 잉ㅆ어서 2개의 기록 펄스에 의해 형성되는 피트를 설명하는 도면, 제5도는 제1도의 실시예에 있어서 8개의 기록 펄스에 의해 형성되는 피트를 설명하는 그림.

Claims (13)

  1. 광자기 기록매체에 1미리 기록되어 있는 기준 클록에 동기한 기록 기본 클럭을 형성하며, 상기 기록 기본 클록과 동일한 주파수의 교번자계를 생성하여 상기 광자기 기록매체의 특정의 기록위치에 인가하여, 기록해야할 데이타에 응하여 상기 기록, 기본 클록의 위상을 변화시켜, 상기 위상이 변화된 기록 기본 클록에 의거하이, 상기 광자기 기록 매체의 특정의 기록 위치에. 열자기 기록에 필요한 소정강도의 스포트를 조사하는 것을 특징으로 하는 광자기 기록 방법
  2. 광자기 기록 매체에 미리 기록되어 있는 기준 클록에 동기한 기록 기본 클록을 생성하는 클록생성수단과, 상기 기록 기본 클록과 동일 주파수의 교번자계를 발생하여. 상기 광자기 기록 매체의 특정의 기록위치에 인가하는 자계 발생수단과, 기록해야할 데이타에 응하여 상기 기록 기본 클록의 위상을 변화시키는 위상 제어 수단과, 상기 위상 제어 수단에 의해 위상이 변화된 기록 기본 클록에 의거하여 상기 광자기 기록 매체의 특정의 기록 위치에, 열자기 기록에 필요한 소정 강도의 스포트를 조사하는 광 조사 수단들을 구비하는 것을 특징으로 하는 광자기 기록장치.
  3. 제2항에 있어서, 상기 자계 발생수단은, 자기 헤드에 설치된 코일과 이 코일에 병렬로 접속된 콘덴서등으로 구성되는 탱크 회로를 포함한 것을 특징으로 하는 광자기 기록장치.
  4. 제2항 또는 제3항에 있어서. 상기 광조사수단은, 상기 교번자계의 피크치근방에 있어서 상기 광자기 기록매체의 특정의 기록매체에 상기 스포트를 조사하는 것을 특징으로 한 광자기 기록장치.
  5. 제2항 내지 제3항 중의 어느 항에 있어서, 상기 자계발생수단이 발생하는 교번자계의 변화 타이밍과, 상기 광조사 수단에 의한 상기 스포트의 조사타이밍을 조정하는 조정수단을 갖추는 것을 특징으로 한 광자기 기록장치.
  6. 제2항 네지 제3항중 어느항에 있어서, 상기 자계 발생수단이 상기 광자기 기록매체의 특정의 기록위치에 인가하는 교번자계의 반주기마다 상기 광조사수단이 상기 특정힌 기록위치에 열자기 기록에 필요한 소정강도의 스포트를 조사하는 것을 특징으로 하는 광자기 기록장치.
  7. 제2항에 있어서, 상기기준 클록은 상기 광자기 기록매체의 반사면에 형성된 요부 또는 철부에 의한 클록피트에 의해기록되어 있으며. 상기 클록 생성수단은, 상기 광자기 기록 매체에 대하여 연속적으로 조사한 레이저 광의 반사광량의 변화에 의거하여 상기 클륵 피트를 검출하여. 기준 클록에 동기한 기록 기본 클록을 생성하는 것을 특징으로 하는 광자기 기록장치.
  8. 제2항에 있어서, 상기 기준 클록은 상기 광자기 기록매체의 반사면에 일정주기로 사행한 도광에 의한 프리글루부에 의해 기록되어 있으며, 상기 클록 생성수단은, 상기 광자기 기록매체에 대하여 조사할 레이저광의 반사광 량의 변화에 의거하여 기준 클록에 동기한 기록매체 클록을 생성하는 것을 특징으로 한 광자기 기록장치.
  9. 제2항에 있어서. 상기 자계 발생수단이 상기 광자기 기록매체의 특정의 기록 위치에 정방향 또는 부방향의 자계를 상호 인가할 때마다 상기 광조사 수단이 상기 특정의 기록위치에 열자기 기록에 필요한 소정 강도의 스포트률 조사함으로써. 기록해야 할 데이타에 응하여 엣지 위치가 소정의 기준위치에서 스텝상태로 시프트한 피트를 상기 광자기 기록 매체에 기록하는 것을 특징으로 하는 광자기 기록장치.
  10. 제9항에 있어서, 기록해야 할 데이타에 응하여 전단 및 후단의 옛지 위치가 소정의 기준위치에서 스텝상태로 시프트 한 피트를 전기 광자기 기록매체에 기록하는 것을 특징으로 하는 광자기 기록장치.
  11. 제9항 또는 제10항에 있어서, 상기 피트는 광자기 막의 부분적인 자화의 반전에 의해 형성되는 것을 특징으로 하는 광자기 기록장치.
  12. 제7항 내지 제10항의 어느 한 항에 있어서, 전기 광자기 기록-매체에 레이저광을 조사하여, 그 반사광의 카회전각의 방향에 의거하여 상기 피트에 대응한 재생신호를 검출하는 광학 검출계의 전달특성에 응하여 결정된 재생신호의 과도기간 보다도 적은 소정의 시프트기간에 상당하는 범위내에서. 기록해야할 데이타에 응하여 엣지 위치를 소정의 기준위치애서 스텝상태로 시프트시켜서 정보피트를 전기 광자기 기록 매체에 기록하는 것을 특징으로 하는 광자기 기록장치.
  13. 피크의 엣지 위치를 소정의 기준 단위에서 스텝상태로 시프트하여 정보를 기록한 광자기 기록매체에서 정보를 재생한 광자기 기록 재생장치에 있어서, 상기 광자기 기록 매체에 미리 기록되어 있는 기준 클록에 동기한 기록 기본 클록을 생성하는 클록 생성수단과, 상기 광자기 기록매체에 레이저광을 조사하여, 그 반사광의 카 회전각의 방향에 의거하여 상기 프트에 대응한 재생신호를 ㄱㅁ출하는 광학검출계와, 상기 기록기본 블록에서 규정된 타이밍으로, 상기 재생신호의 재생 레벨을 검출하는 레벨 검출 수단과, 상기 재생 레벨에 의거하여 상기 피트의 엣지 위치의 시프트량에 대응한 기록정보를 판정하는 판정수단들을 구비하는 것을 특징으로 한 광자기 기록 재생 장치.
    참고사항 : 최초출원 내용에 의하여 공개하는 것임.
KR1019930012879A 1992-07-07 1993-07-07 Magneto-optical recording method and recording and reproducing device thereof KR100271555B1 (en)

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