DE69822956D1 - Optische Platte mit elektronischem Wasserzeichen, Wiedergabegerät dafür und Kopierschutzverfahren damit - Google Patents

Optische Platte mit elektronischem Wasserzeichen, Wiedergabegerät dafür und Kopierschutzverfahren damit

Info

Publication number
DE69822956D1
DE69822956D1 DE69822956T DE69822956T DE69822956D1 DE 69822956 D1 DE69822956 D1 DE 69822956D1 DE 69822956 T DE69822956 T DE 69822956T DE 69822956 T DE69822956 T DE 69822956T DE 69822956 D1 DE69822956 D1 DE 69822956D1
Authority
DE
Germany
Prior art keywords
optical disc
playback device
copy protection
device therefor
electronic watermark
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 - Lifetime
Application number
DE69822956T
Other languages
English (en)
Other versions
DE69822956T2 (de
Inventor
Hisashi Yamada
Hideo Ando
Tadashi Kojima
Kouichi Hirayama
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
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 Toshiba Corp filed Critical Toshiba Corp
Publication of DE69822956D1 publication Critical patent/DE69822956D1/de
Application granted granted Critical
Publication of DE69822956T2 publication Critical patent/DE69822956T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • G11B20/00086—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy
    • G11B20/0092—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which are linked to media defects or read/write errors
    • 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
    • G11B20/00884—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving a watermark, i.e. a barely perceptible transformation of the original data which can nevertheless be recognised by an algorithm
    • 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
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • G11B20/1833—Error detection or correction; Testing, e.g. of drop-outs by adding special lists or symbols to the coded information
DE69822956T 1997-09-16 1998-09-08 Optische Platte mit elektronischem Wasserzeichen, Wiedergabegerät dafür und Kopierschutzverfahren damit Expired - Lifetime DE69822956T2 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP25102297A JP3488603B2 (ja) 1997-09-16 1997-09-16 電子透かしを利用したコピープロテクトシステム
JP25102297 1997-09-16

Publications (2)

Publication Number Publication Date
DE69822956D1 true DE69822956D1 (de) 2004-05-13
DE69822956T2 DE69822956T2 (de) 2005-03-24

Family

ID=17216468

Family Applications (1)

Application Number Title Priority Date Filing Date
DE69822956T Expired - Lifetime DE69822956T2 (de) 1997-09-16 1998-09-08 Optische Platte mit elektronischem Wasserzeichen, Wiedergabegerät dafür und Kopierschutzverfahren damit

Country Status (6)

Country Link
US (1) US6490683B1 (de)
EP (1) EP0908881B1 (de)
JP (1) JP3488603B2 (de)
KR (1) KR100284967B1 (de)
CN (1) CN1103101C (de)
DE (1) DE69822956T2 (de)

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Also Published As

Publication number Publication date
KR19990029765A (ko) 1999-04-26
US6490683B1 (en) 2002-12-03
CN1103101C (zh) 2003-03-12
EP0908881B1 (de) 2004-04-07
EP0908881A2 (de) 1999-04-14
KR100284967B1 (ko) 2001-04-02
CN1211788A (zh) 1999-03-24
JPH1186436A (ja) 1999-03-30
JP3488603B2 (ja) 2004-01-19
DE69822956T2 (de) 2005-03-24
EP0908881A3 (de) 1999-09-08

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