KR970707541A - Playback circuit - Google Patents

Playback circuit

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Publication number
KR970707541A
KR970707541A KR1019970703359A KR19970703359A KR970707541A KR 970707541 A KR970707541 A KR 970707541A KR 1019970703359 A KR1019970703359 A KR 1019970703359A KR 19970703359 A KR19970703359 A KR 19970703359A KR 970707541 A KR970707541 A KR 970707541A
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KR
South Korea
Prior art keywords
reproduction signal
signal
timing
reproduction
information data
Prior art date
Application number
KR1019970703359A
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Korean (ko)
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KR100488636B1 (en
Inventor
주니치 호리고메
Original Assignee
이데이 노부유키
소니 가부시키가이샤
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Application filed by 이데이 노부유키, 소니 가부시키가이샤 filed Critical 이데이 노부유키
Publication of KR970707541A publication Critical patent/KR970707541A/en
Application granted granted Critical
Publication of KR100488636B1 publication Critical patent/KR100488636B1/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
    • 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
    • G11B11/10597—Adaptations for transducing various formats on the same or different carriers
    • 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
    • G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
    • G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
    • G11B27/19—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier
    • G11B27/28—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording
    • G11B27/30—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording
    • G11B27/3027—Indexing; Addressing; Timing or synchronising; Measuring tape travel by using information detectable on the record carrier by using information signals recorded by the same method as the main recording on the same track as the main recording used signal is digitally coded
    • 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
    • G11B11/10515—Reproducing

Abstract

각 섹터에 정보데이터와 동기 데이터라든가 트랙을 따라 순차 기록된 기록매체를 재생하는 재생장치로서, 정보 데이터 및 동기 데이터를 판독하여 재생신호를 생성하는 판독수단과, 제1시정수와 상기 제1시정수보다도 큰 제2시정수 중 한 개를 선택하여 상기 재생신호에 AC 결합을 행하는 것으로 수정 재생신호를 생성하는 AC 결합수단과, 판독수단이 동기 데이터를 판독하는 타이밍을 나타내는 검출 신호를 출력하는 검출수단과, 상기 검출신호에 근거하여 결정되는 제1타이밍으로부터 소정시간 후의 제2타이밍까지의 제1시정수를 선택하여, 제2타이밍으로 제2시정수를 선택하도록 AC 결합수단을 제어하는 제어수단과, 수정 재생신호를 2치화하여 2치화 수정 재생신호를 생성하는 2치화수단과, 2치화 수정 재생신호로부터 정보신호를 원상회복하는 원상회복수단을 구비하고 있다.A reproducing apparatus for reproducing a recording medium sequentially recorded along information and information data and synchronous data in each sector, comprising: reading means for reading information data and synchronous data to generate a reproduction signal, a first time constant and the first time correction; AC coupling means for generating a modified reproduction signal by selecting one of the second time constants larger than the number and performing AC coupling to the reproduction signal, and detection for outputting a detection signal indicating a timing at which the reading means reads the synchronous data. Means and a control means for controlling the AC coupling means to select a first time constant from a first timing determined based on the detection signal to a second timing after a predetermined time, and to select a second time constant with a second timing. Binarization means for binarizing the corrected reproduction signal to generate a binary correction reproduction signal; It has a plurality of stages.

이러한 간단한 구성으로, 재생신호의 정보데이터에 포함되어야 할 DC 성분의 소실을 방지하면서, 동기 데이터부분에서의 과도상태의 기간을 짧게 하여 동기 데이터를 정확하게 재생할 수 있도록 한다.With this simple configuration, it is possible to accurately reproduce the synchronous data by shortening the period of the transient state in the synchronous data portion while preventing the loss of the DC component that should be included in the information data of the reproduced signal.

Description

재생 회로(Playback circuit)Playback circuit

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

제1도는 본 실시예와 관계되는 광자기디스크·시스템의 주요부의 구성을 나타내는 도면, 제2도는 제1도의 광자기디스크·시스템의 기록매체인 광자기디스크로 사용되는 섹터·포맷을 설명하는 도면.FIG. 1 is a diagram showing the configuration of main parts of the magneto-optical disk system according to the present embodiment, and FIG. 2 is a diagram for explaining the sector format used as the magneto-optical disk which is a recording medium of the magneto-optical disk system of FIG. .

Claims (6)

정보데이터와 상기 정보데이터를 재생할 때에 동기를 취하기 위해서 사용되는 동기 데이터가 트랙을 따라 순차 기록된 기록매체를 재생하는 재생장치에 있어서, 상기 정보데이터 및 상기 동기 데이터를 판독하여 재생 신호를 생성하는 판독수단과, 제1시정수와 상기 제2시정수보다 큰 제 2시정수 중 한 개를 선택하여 상기 재생신호에 AC 결합을 행하는 것으로 수정 재생신호를 생성하는 AC 결합수단과, 상기 판독수단이 상기 동기 데이터를 판독하는 타이밍을 나타내는 검출신호를 출력하는 검출수단과, 상기 검출신호에 근거하여 결정되는 제1타이밍으로부터 소정 시간 후의 제2타이밍까지의 상기 제1시정수를 선택하여, 상기 제2타이밍으로 상기 제2시정수를 선택하도록 상기 AC 결합수단을 제어하는 제어수단과, 상기 수정 재생신호를 2치화하여 2치화 수정 재생신호를 생성하는 2치화수단과, 상기 2치화 수정 재생신호로부터 상기 정보신호를 원상회복하는 원상회복수단을 구비한 것을 특징으로 하는 재생장치.A reproducing apparatus for reproducing a recording medium in which information data and synchronization data used for synchronizing the information data are sequentially recorded along a track, wherein the reading device reads the information data and the synchronization data to generate a reproduction signal. AC combining means for generating a modified reproduction signal by selecting one of the means, a first time constant and a second time constant larger than the second time constant, and performing AC coupling to the reproduction signal; Detection means for outputting a detection signal indicative of a timing for reading the synchronous data, and the first timing constant from the first timing determined to the second timing after a predetermined time determined based on the detection signal, thereby selecting the second timing. Control means for controlling the AC coupling means to select the second time constant, and binarize the corrected reproduction signal by binarization; Binarization means for generating a reproduction information signal and, from the two-valued modified reproduction signal reproducing apparatus which is characterized in that it includes the restitution means for the restitution of the information signal. 제1항에 있어서, 상기 AC 결합수단은 상기 판독수단의 출력측으로 일단이 접속돈 콘덴세와, 상기 콘덴서의 타단에 일단이 접속된 복수개의 저항과, 상기 복수개의 저항의 타단을 상기 제어수단에 의해서 선택적으로 접지하는 접속수단을 구비한 것을 특징으로 하는 재생장치.The control means according to claim 1, wherein the AC coupling means includes a condenser whose one end is connected to the output side of the reading means, a plurality of resistors whose one end is connected to the other end of the capacitor, and the other end of the plurality of resistors to the control means. And a connecting means for selectively grounding by means of a reproducing apparatus. 제1항에 있어서, 상기 정보데이터는 DC 성분을 포함하고 있는 것을 특징으로 하는 재생장치.A reproduction apparatus according to claim 1, wherein said information data includes a DC component. 제3항에 있어서, 상기 DC 성분을 포함하는 정보데이터는 (1, 7)－RLL 변환되어 펄스변조되는 것을 특징으로 하는 재생장치.4. The reproduction apparatus according to claim 3, wherein the information data including the DC component is (1, 7) -RLL converted and pulse-modulated. 제1항에 있어서, 상기 기록매체에 대하여, 섹터의 선두를 나타내는 섹터마크, 상기 동기 데이터 및 상기 정보데이터를 가지는 섹터가 상기 트랙을 따라서 순차 기록되어 있고, 상기 검출수단은 상기 판독수단에 의해서 판독된 재생신호가 상기 섹터마크로부터의 재생신호일 때에 상기 검출신호를 출력하는 것을 특징으로 하는 재생장치.2. The sector according to claim 1, wherein a sector mark indicating the head of a sector, a sector having the synchronous data and the information data is sequentially recorded along the track with respect to the recording medium, and the detecting means is read by the reading means. And the detection signal is output when the reproduced signal is a reproduction signal from the sector mark. 정보데이터와 상기 정보데이터를 재생할 때에 동기를 취하기 위해서 사용되는 동기 데이터가 트랙을 따라서 순차 기록된 기록매체를 재생하는 재생장치에 있어서, 상기 동기 데이터 및 상기 정보데이터를 판독하여 재생신호를 생성하는 판독수단과, 제1시정수로 상기 재생신호에 AC 결합을 행하는 것으로 제1수정 재생신호를 생성하는 제1AC 결합수단과, 상기 제1시정수보다 시정수가 더 큰 제2시정수로 상기 재생신호에 AC 결합을 행하는 것으로 제2수정 재생신호를 생성하는 제2AC 결합수단과, 상기 판독수단이 상기 동기 데이터를 판독하는 타이밍을 나타내는 검출신호를 출력하는 검출수단과, 상기 검출신호에 근거하여 결정되는 제1타이밍으로부터 소정시간 후의 제2타이밍까지 상기 제1수정 재생신호를 선택하여 출력하여, 상기 제 2타이밍으로 상기 제2수정 재생신호를 선택하여 출력하는 선택수단과, 상기 제1 및 제2수정 재생신호를 2치화하여 2치화수정 재생신호를 생성하는 2치화수단과, 상기 2치화 수정 재생신호로부터 상기 정보데이터를 원상회복하는 원상회복수단을 구비한 것을 특징으로 하는 재생장치.A reproduction apparatus for reproducing a recording medium in which information data and synchronization data used for synchronizing the information data are sequentially recorded along tracks, wherein the reproduction data is read to generate a reproduction signal by reading the synchronization data and the information data. Means, first AC coupling means for generating a first modified reproduction signal by performing AC coupling to the reproduction signal at a first time constant, and a second time constant having a larger time constant than the first time constant to the reproduction signal. Second AC coupling means for generating a second modified reproduction signal by performing AC coupling, detection means for outputting a detection signal indicating a timing at which the reading means reads the synchronous data, and a second determination means based on the detection signal. Selecting and outputting the first modified reproduction signal from one timing to a second timing after a predetermined time; Selecting means for selecting and outputting a binary correction reproduction signal, binarizing means for generating a binary correction reproduction signal by binarizing the first and second correction reproduction signals, and receiving the information data from the binary correction reproduction signal. A reproducing apparatus, comprising: an original recovery means for recovering the original shape. ※ 참고사항：최초출원 내용에 의하여 공개하는 것임.※ Note: The disclosure is based on the initial application.
KR1019970703359A 1995-09-21 1996-09-24 Playback device KR100488636B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP95-243264 1995-09-21
JP24326495 1995-09-21

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KR970707541A true KR970707541A (en) 1997-12-01
KR100488636B1 KR100488636B1 (en) 2005-09-30

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KR1019970703359A KR100488636B1 (en) 1995-09-21 1996-09-24 Playback device

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WO (1) WO1997023874A1 (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3832956B2 (en) * 1998-01-29 2006-10-11 富士通株式会社 Optical storage device and sector mark detection method for optical storage device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5577020A (en) * 1978-12-01 1980-06-10 Nec Corp Readout circuit of magnetic recording device
JPH04162257A (en) * 1990-10-26 1992-06-05 Olympus Optical Co Ltd Digital information reading circuit for recording and reproducing device
JP2865966B2 (en) * 1993-01-28 1999-03-08 株式会社日立製作所 Recording medium signal reproduction method

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WO1997023874A1 (en) 1997-07-03
KR100488636B1 (en) 2005-09-30
JP4150074B2 (en) 2008-09-17

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