KR0161702B1 - 복사 방지 기능을 갖춘 광 디스크 - Google Patents

복사 방지 기능을 갖춘 광 디스크 Download PDF

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Publication number
KR0161702B1
KR0161702B1 KR1019940017743A KR19940017743A KR0161702B1 KR 0161702 B1 KR0161702 B1 KR 0161702B1 KR 1019940017743 A KR1019940017743 A KR 1019940017743A KR 19940017743 A KR19940017743 A KR 19940017743A KR 0161702 B1 KR0161702 B1 KR 0161702B1
Authority
KR
South Korea
Prior art keywords
signal
information
key information
digital data
pit
Prior art date
Legal status (The legal status 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 status listed.)
Expired - Fee Related
Application number
KR1019940017743A
Other languages
English (en)
Korean (ko)
Other versions
KR950004231A (ko
Inventor
히로후미 나가노
Original Assignee
보조 다꾸로
니뽕 빅터 가부시끼가이샤
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 보조 다꾸로, 니뽕 빅터 가부시끼가이샤 filed Critical 보조 다꾸로
Publication of KR950004231A publication Critical patent/KR950004231A/ko
Application granted granted Critical
Publication of KR0161702B1 publication Critical patent/KR0161702B1/ko
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

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
    • 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
    • G11B7/007—Arrangement of the information on the record carrier, e.g. form of tracks, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track
    • G11B7/00736—Auxiliary data, e.g. lead-in, lead-out, Power Calibration Area [PCA], Burst Cutting Area [BCA], control information
    • 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
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • 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
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00572—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium
    • G11B20/00586—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the physical format of the recording medium
    • 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
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/00572—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium
    • G11B20/00586—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the physical format of the recording medium
    • G11B20/00594—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium said format change concerning the physical format of the recording medium wherein the shape of recording marks is altered, e.g. the depth, width, or length of pits
    • 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
    • G11B7/24—Record carriers characterised by shape, structure or physical properties, or by the selection of the material
    • G11B7/26—Apparatus or processes specially adapted for the manufacture of record carriers
    • G11B7/261—Preparing a master, e.g. exposing photoresist, electroforming

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Optical Recording Or Reproduction (AREA)
  • Optical Record Carriers And Manufacture Thereof (AREA)
KR1019940017743A 1993-07-22 1994-07-22 복사 방지 기능을 갖춘 광 디스크 Expired - Fee Related KR0161702B1 (ko)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP93-201738 1993-07-22
JP5201738A JP2776209B2 (ja) 1993-07-22 1993-07-22 光ディスク及び情報記録再生装置

Publications (2)

Publication Number Publication Date
KR950004231A KR950004231A (ko) 1995-02-17
KR0161702B1 true KR0161702B1 (ko) 1998-12-15

Family

ID=16446123

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1019940017743A Expired - Fee Related KR0161702B1 (ko) 1993-07-22 1994-07-22 복사 방지 기능을 갖춘 광 디스크

Country Status (6)

Country Link
US (1) US5570339A (enExample)
EP (1) EP0635828B1 (enExample)
JP (1) JP2776209B2 (enExample)
KR (1) KR0161702B1 (enExample)
DE (1) DE69421459T2 (enExample)
TW (1) TW269037B (enExample)

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Also Published As

Publication number Publication date
EP0635828B1 (en) 1999-11-03
KR950004231A (ko) 1995-02-17
EP0635828A1 (en) 1995-01-25
DE69421459T2 (de) 2000-02-10
TW269037B (enExample) 1996-01-21
JPH0737255A (ja) 1995-02-07
JP2776209B2 (ja) 1998-07-16
DE69421459D1 (de) 1999-12-09
US5570339A (en) 1996-10-29

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