GB2340968B - Preventing circumvention of copy protection - Google Patents

Preventing circumvention of copy protection

Info

Publication number
GB2340968B
GB2340968B GB9810518A GB9810518A GB2340968B GB 2340968 B GB2340968 B GB 2340968B GB 9810518 A GB9810518 A GB 9810518A GB 9810518 A GB9810518 A GB 9810518A GB 2340968 B GB2340968 B GB 2340968B
Authority
GB
United Kingdom
Prior art keywords
copy protection
preventing circumvention
circumvention
preventing
copy
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
GB9810518A
Other versions
GB9810518D0 (en
GB2340968A (en
Inventor
Roger Edwards
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.)
Rovi Solutions Ltd
Original Assignee
Macrovision Europe Ltd
C Dilla 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 Macrovision Europe Ltd, C Dilla Ltd filed Critical Macrovision Europe Ltd
Priority to GB9810518A priority Critical patent/GB2340968B/en
Publication of GB9810518D0 publication Critical patent/GB9810518D0/en
Publication of GB2340968A publication Critical patent/GB2340968A/en
Application granted granted Critical
Publication of GB2340968B publication Critical patent/GB2340968B/en
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
    • G11B20/00681—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which prevent a specific kind of data access
    • G11B20/00695—Circuits for prevention of unauthorised reproduction or copying, e.g. piracy involving measures which prevent a specific kind of data access said measures preventing that data are read from 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Security & Cryptography (AREA)
  • Signal Processing (AREA)
  • Signal Processing For Digital Recording And Reproducing (AREA)
  • Storage Device Security (AREA)
GB9810518A 1998-05-15 1998-05-15 Preventing circumvention of copy protection Expired - Lifetime GB2340968B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9810518A GB2340968B (en) 1998-05-15 1998-05-15 Preventing circumvention of copy protection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9810518A GB2340968B (en) 1998-05-15 1998-05-15 Preventing circumvention of copy protection

Publications (3)

Publication Number Publication Date
GB9810518D0 GB9810518D0 (en) 1998-07-15
GB2340968A GB2340968A (en) 2000-03-01
GB2340968B true GB2340968B (en) 2003-02-26

Family

ID=10832168

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9810518A Expired - Lifetime GB2340968B (en) 1998-05-15 1998-05-15 Preventing circumvention of copy protection

Country Status (1)

Country Link
GB (1) GB2340968B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29917222U1 (en) * 1999-09-30 2000-01-05 Sonopress Produktionsgesellschaft für Ton- und Informationsträger mbH, 33332 Gütersloh Disc-shaped optical storage medium
CN1301502C (en) * 2003-10-24 2007-02-21 扬智科技股份有限公司 Method for protecting DVD recording playback machine with anticopying function

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5418852A (en) * 1992-03-18 1995-05-23 Fujitsu Limited Unauthorized use prevention method for optical disks, optical disk having unauthorized use prevention function, and optical disk apparatus
EP0762417A2 (en) * 1995-08-25 1997-03-12 Sony Corporation Signal recording and reproducing, signal record media and signal transmission and reception
WO1997045836A1 (en) * 1996-05-31 1997-12-04 Cagent Technologies, Inc. Optical disk with copy protection

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5418852A (en) * 1992-03-18 1995-05-23 Fujitsu Limited Unauthorized use prevention method for optical disks, optical disk having unauthorized use prevention function, and optical disk apparatus
EP0762417A2 (en) * 1995-08-25 1997-03-12 Sony Corporation Signal recording and reproducing, signal record media and signal transmission and reception
WO1997045836A1 (en) * 1996-05-31 1997-12-04 Cagent Technologies, Inc. Optical disk with copy protection

Also Published As

Publication number Publication date
GB9810518D0 (en) 1998-07-15
GB2340968A (en) 2000-03-01

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Legal Events

Date Code Title Description
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)
732E Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)

Free format text: REGISTERED BETWEEN 20110217 AND 20110223

PE20 Patent expired after termination of 20 years

Expiry date: 20180514