EP1076902A4 - Authentification de supports optiques numeriques et protection contre les copies - Google Patents

Authentification de supports optiques numeriques et protection contre les copies

Info

Publication number
EP1076902A4
EP1076902A4 EP97933829A EP97933829A EP1076902A4 EP 1076902 A4 EP1076902 A4 EP 1076902A4 EP 97933829 A EP97933829 A EP 97933829A EP 97933829 A EP97933829 A EP 97933829A EP 1076902 A4 EP1076902 A4 EP 1076902A4
Authority
EP
European Patent Office
Prior art keywords
optical media
class
standard
symbols
codes
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.)
Withdrawn
Application number
EP97933829A
Other languages
German (de)
English (en)
Other versions
EP1076902A2 (fr
Inventor
Bruce David Sollish
Dennis Howe
Henry Marshall Israel
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.)
TTR TECHNOLOGIES Ltd
Original Assignee
TTR TECHNOLOGIES Ltd
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 TTR TECHNOLOGIES Ltd filed Critical TTR TECHNOLOGIES Ltd
Publication of EP1076902A2 publication Critical patent/EP1076902A2/fr
Publication of EP1076902A4 publication Critical patent/EP1076902A4/fr
Withdrawn legal-status Critical Current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
    • G11B20/00572—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which change the format of the recording medium
    • G11B20/00579—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 data encoding, e.g., modulation schemes violating run-length constraints, causing excessive DC content, or involving uncommon codewords or sync patterns
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K19/00—Record carriers for use with machines and with at least a part designed to carry digital markings
    • G06K19/06—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code
    • G06K19/06009—Record carriers for use with machines and with at least a part designed to carry digital markings characterised by the kind of the digital marking, e.g. shape, nature, code with optically detectable marking
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06K—GRAPHICAL DATA READING; PRESENTATION OF DATA; RECORD CARRIERS; HANDLING RECORD CARRIERS
    • G06K7/00—Methods or arrangements for sensing record carriers, e.g. for reading patterns
    • G06K7/10—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation
    • G06K7/14—Methods or arrangements for sensing record carriers, e.g. for reading patterns by electromagnetic radiation, e.g. optical sensing; by corpuscular radiation using light without selection of wavelength, e.g. sensing reflected white light
    • G06K7/1404—Methods for optical code recognition
    • G06K7/146—Methods for optical code recognition the method including quality enhancement steps
    • G06K7/1465—Methods for optical code recognition the method including quality enhancement steps using several successive scans of the optical 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
    • G11B20/00086—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
    • G11B20/00094—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers
    • G11B20/00123—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which result in a restriction to authorised record carriers the record carrier being identified by recognising some of its unique characteristics, e.g. a unique defect pattern serving as a physical signature of the record carrier
    • 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
    • G11B20/0021—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving encryption or decryption of contents recorded on or reproduced from a record carrier
    • 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
    • G11B20/0092—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which are linked to media defects or read/write errors
    • G11B20/00927—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which are linked to media defects or read/write errors wherein said defects or errors are generated on purpose, e.g. intended scratches
    • 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
    • G11B20/18—Error detection or correction; Testing, e.g. of drop-outs
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/35—Unequal or adaptive error protection, e.g. by providing a different level of protection according to significance of source information or by adapting the coding according to the change of transmission channel characteristics
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Computer Security & Cryptography (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Electromagnetism (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Artificial Intelligence (AREA)
  • Computer Vision & Pattern Recognition (AREA)
  • Probability & Statistics with Applications (AREA)
  • Quality & Reliability (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Optical Recording Or Reproduction (AREA)

Abstract

Nouveaux supports optiques numériques sur lesquels sont enregistrés certains symboles appartenant à deux classes de codes spéciaux se trouvant dans des emplacements spécifiques déterminés. L'une des classes fournit des symboles dont le décodage, après plusieurs lectures par un lecteur classique de supports optiques, indique que les symboles en question sont valables mais qu'ils ont des valeurs variables. La seconde classe est composée de codes dont le décodeur du lecteur reconnaît immédiatement l'invalidité. Les codes de la première classe de codes spéciaux peuvent être lus par un lecteur classique de supports optiques, mais ils ne peuvent pas être écrits ou copiés par les enregistreurs classiques de supports optiques, ni par les appareils de matriçage. Par conséquent, leur présence sur les supports optiques sert à indiquer l'authenticité des supports optiques et à les distinguer d'une copie non autorisée qui serait dépourvue de ces symboles spéciaux. Les symboles de la seconde classe de codes spéciaux servent à protéger la lecture des symboles de la première classe contre toute modification ou stabilisation par le système de correction d'erreurs du lecteur. Des groupes de symboles issus des deux dites classes et disposés selon une configuration particulière constituent un marquage impossible à copier permettant la vérification automatique de l'authenticité des supports optiques, et la protection des données enregistrées sur ces supports, de sorte qu'elles ne puissent être exploitées que lorsqu'elles sont présentes sur des supports authentiques.
EP97933829A 1996-08-05 1997-08-05 Authentification de supports optiques numeriques et protection contre les copies Withdrawn EP1076902A4 (fr)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US689209 1985-01-07
US68920996A 1996-08-05 1996-08-05
US3808097P 1997-03-06 1997-03-06
US38080P 1997-03-06
PCT/IL1997/000266 WO1998008180A2 (fr) 1996-08-05 1997-08-05 Authentification de supports optiques numeriques et protection contre les copies

Publications (2)

Publication Number Publication Date
EP1076902A2 EP1076902A2 (fr) 2001-02-21
EP1076902A4 true EP1076902A4 (fr) 2001-05-23

Family

ID=26714832

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97933829A Withdrawn EP1076902A4 (fr) 1996-08-05 1997-08-05 Authentification de supports optiques numeriques et protection contre les copies

Country Status (4)

Country Link
EP (1) EP1076902A4 (fr)
AU (1) AU3706197A (fr)
IL (1) IL128369A0 (fr)
WO (1) WO1998008180A2 (fr)

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IL122393A0 (en) * 1997-12-01 1998-06-15 Ttr Technologies Ltd A code word for use in digital optical media and a method of generation thereof
JP4147607B2 (ja) 1998-03-13 2008-09-10 松下電器産業株式会社 補助スクランブル／デスクランブル方法および装置
US6684199B1 (en) * 1998-05-20 2004-01-27 Recording Industry Association Of America Method for minimizing pirating and/or unauthorized copying and/or unauthorized access of/to data on/from data media including compact discs and digital versatile discs, and system and data media for same
US6029259A (en) * 1998-06-15 2000-02-22 T.T.R. Technologies Ltd. Method and system for authenticating digital optical media
US6425098B1 (en) 1998-10-20 2002-07-23 Midbar Tech (1998) Ltd. Prevention of disk piracy
US6988206B1 (en) * 1998-10-20 2006-01-17 Macrovision Europe Limited Prevention of CD-audio piracy using sub-code channels
AU4238400A (en) * 1999-04-12 2000-11-14 Macrovision Corporation Copy protection signature for compact disks
WO2001080546A2 (fr) * 1999-08-09 2001-10-25 Midbar Tech Ltd. Prevention du piratage de cd audio au moyen de canaux a sous-codes
IL131545A0 (en) * 1999-08-23 2001-01-28 Ttr Technologies Ltd Copy-protected digital audio compact disc and method and system for producing same
CN100468546C (zh) * 2000-04-07 2009-03-11 索尼达德克奥地利股份公司 光盘拷贝防止系统
MXPA02010186A (es) * 2000-04-14 2004-08-19 Macrovision Europ Ltd Prevencion de copiado ilegal de discos compactos de audio utilizando canales de sub-codigo.
US6638593B2 (en) * 2000-06-30 2003-10-28 Verification Technologies, Inc. Copy-protected optical media and method of manufacture thereof
US20050050343A1 (en) * 2000-06-30 2005-03-03 Selinfreund Richard H. Storage media access control method and system
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EP1710796A1 (fr) * 2000-11-14 2006-10-11 Koninklijke Philips Electronics N.V. Support d'enregistrement à filigrane
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US6767695B2 (en) * 2001-01-17 2004-07-27 International Business Machines Corporation CDROM copy protection
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Also Published As

Publication number Publication date
WO1998008180A3 (fr) 1998-08-20
IL128369A0 (en) 2000-01-31
AU3706197A (en) 1998-03-06
EP1076902A2 (fr) 2001-02-21
WO1998008180A2 (fr) 1998-02-26

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