GB2387497B - Anti-copy protection for a video signal - Google Patents

Anti-copy protection for a video signal

Info

Publication number
GB2387497B
GB2387497B GB0202384A GB0202384A GB2387497B GB 2387497 B GB2387497 B GB 2387497B GB 0202384 A GB0202384 A GB 0202384A GB 0202384 A GB0202384 A GB 0202384A GB 2387497 B GB2387497 B GB 2387497B
Authority
GB
United Kingdom
Prior art keywords
video signal
copy protection
copy
protection
video
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
GB0202384A
Other versions
GB0202384D0 (en
GB2387497A (en
Inventor
Arie Wijnen
Baolin Tan
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.)
Dwight Cavendish Systems Ltd
Original Assignee
Dwight Cavendish Systems 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 Dwight Cavendish Systems Ltd filed Critical Dwight Cavendish Systems Ltd
Priority to GB0407606A priority Critical patent/GB2396767B8/en
Priority to GB0202384A priority patent/GB2387497B/en
Publication of GB0202384D0 publication Critical patent/GB0202384D0/en
Priority to PCT/GB2003/000450 priority patent/WO2003065716A2/en
Publication of GB2387497A publication Critical patent/GB2387497A/en
Priority to US10/909,918 priority patent/US20050111661A1/en
Application granted granted Critical
Publication of GB2387497B publication Critical patent/GB2387497B/en
Priority to US12/463,209 priority patent/US8542980B2/en
Priority to US14/033,235 priority patent/US9269392B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/91—Television signal processing therefor
    • H04N5/913—Television signal processing therefor for scrambling ; for copy protection
    • H04N2005/91307—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal
    • H04N2005/91314—Television signal processing therefor for scrambling ; for copy protection by adding a copy protection signal to the video signal the copy protection signal being a pulse signal inserted in blanking intervals of the video signal, e.g. pseudo-AGC pulses, pseudo-sync pulses
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H04N5/775—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/765—Interface circuits between an apparatus for recording and another apparatus
    • H04N5/775—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television receiver
    • H04N5/7755—Interface circuits between an apparatus for recording and another apparatus between a recording apparatus and a television receiver the recorder being connected to, or coupled with, the antenna of the television receiver

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)
GB0202384A 2002-02-01 2002-02-01 Anti-copy protection for a video signal Expired - Fee Related GB2387497B (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB0407606A GB2396767B8 (en) 2002-02-01 2002-02-01 Anti-copy protection for a video signal
GB0202384A GB2387497B (en) 2002-02-01 2002-02-01 Anti-copy protection for a video signal
PCT/GB2003/000450 WO2003065716A2 (en) 2002-02-01 2003-02-03 Anti-copy protection for a video signal
US10/909,918 US20050111661A1 (en) 2002-02-01 2004-08-02 Anti-copy protection for a video signal
US12/463,209 US8542980B2 (en) 2002-02-01 2009-05-08 Anti-copy protection for a video signal
US14/033,235 US9269392B2 (en) 2002-02-01 2013-09-20 Anti-copy protection for a video signal

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0202384A GB2387497B (en) 2002-02-01 2002-02-01 Anti-copy protection for a video signal

Publications (3)

Publication Number Publication Date
GB0202384D0 GB0202384D0 (en) 2002-03-20
GB2387497A GB2387497A (en) 2003-10-15
GB2387497B true GB2387497B (en) 2004-12-08

Family

ID=9930239

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0202384A Expired - Fee Related GB2387497B (en) 2002-02-01 2002-02-01 Anti-copy protection for a video signal
GB0407606A Expired - Fee Related GB2396767B8 (en) 2002-02-01 2002-02-01 Anti-copy protection for a video signal

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB0407606A Expired - Fee Related GB2396767B8 (en) 2002-02-01 2002-02-01 Anti-copy protection for a video signal

Country Status (2)

Country Link
GB (2) GB2387497B (en)
WO (1) WO2003065716A2 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8306403B2 (en) 2010-03-29 2012-11-06 Rovi Technologies Corporation Content control via guide data and/or metadata
US8428258B2 (en) 2007-05-02 2013-04-23 Rovi Technologies Corporation Method and apparatus for providing content control via detection of modifications to a signal

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2390247B (en) 2002-06-28 2006-04-12 Dwight Cavendish Systems Ltd An improved method and apparatus for providing an anti-copy video signal
GB0312985D0 (en) 2003-06-05 2003-07-09 Dwight Cavendish Systems Ltd Digital processing disruption systems
GB2419220B (en) 2004-10-13 2009-06-03 Dwight Cavendish Systems Ltd Audio copy protection system

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100575A (en) * 1976-03-22 1978-07-11 Sony Corporation Method of and apparatus for modifying a video signal to prevent unauthorized recording and reproduction thereof
US4163253A (en) * 1976-03-23 1979-07-31 Sony Corporation Method of and apparatus for modifying a video signal to prevent unauthorized recording and reproduction thereof
US4571642A (en) * 1981-08-24 1986-02-18 Hofstein Steven R Method of and apparatus for modifying a video signal to prevent the unauthorized recording and reproduction thereof
US4631603A (en) * 1985-04-17 1986-12-23 Macrovision Method and apparatus for processing a video signal so as to prohibit the making of acceptable video tape recordings thereof
WO1988002588A1 (en) * 1986-09-24 1988-04-07 Conny Togeretz Method of preventing unauthorized reproduction of the content of video cassette tapes and apparatus for executing the method
US4888649A (en) * 1987-03-18 1989-12-19 Shinano Kikaku Company Ltd. Noncopiably recorded videotape and noncopiably videotape-recording system
WO1999000977A1 (en) * 1997-06-30 1999-01-07 Macrovision Corporation Protection of a component video signal
US6188832B1 (en) * 1997-05-07 2001-02-13 Microvision Corp Method and apparatus for modifications made to a video signal to inhibit the making of acceptable videotape recordings

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EA001026B1 (en) * 1995-04-07 2000-08-28 Тревор Франклин Method and apparatus for treating a video signal, method for decoding a treated video signal and apparatus therfor
US5737417A (en) * 1995-04-24 1998-04-07 Technicolor Videocassette, Inc. Videotape anti-copying encryption scheme

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4100575A (en) * 1976-03-22 1978-07-11 Sony Corporation Method of and apparatus for modifying a video signal to prevent unauthorized recording and reproduction thereof
US4163253A (en) * 1976-03-23 1979-07-31 Sony Corporation Method of and apparatus for modifying a video signal to prevent unauthorized recording and reproduction thereof
US4571642A (en) * 1981-08-24 1986-02-18 Hofstein Steven R Method of and apparatus for modifying a video signal to prevent the unauthorized recording and reproduction thereof
US4631603A (en) * 1985-04-17 1986-12-23 Macrovision Method and apparatus for processing a video signal so as to prohibit the making of acceptable video tape recordings thereof
WO1988002588A1 (en) * 1986-09-24 1988-04-07 Conny Togeretz Method of preventing unauthorized reproduction of the content of video cassette tapes and apparatus for executing the method
US4888649A (en) * 1987-03-18 1989-12-19 Shinano Kikaku Company Ltd. Noncopiably recorded videotape and noncopiably videotape-recording system
US6188832B1 (en) * 1997-05-07 2001-02-13 Microvision Corp Method and apparatus for modifications made to a video signal to inhibit the making of acceptable videotape recordings
WO1999000977A1 (en) * 1997-06-30 1999-01-07 Macrovision Corporation Protection of a component video signal

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8428258B2 (en) 2007-05-02 2013-04-23 Rovi Technologies Corporation Method and apparatus for providing content control via detection of modifications to a signal
US8306403B2 (en) 2010-03-29 2012-11-06 Rovi Technologies Corporation Content control via guide data and/or metadata

Also Published As

Publication number Publication date
GB2396767B8 (en) 2005-03-15
GB2396767B (en) 2004-09-08
GB0202384D0 (en) 2002-03-20
GB0407606D0 (en) 2004-05-05
WO2003065716A2 (en) 2003-08-07
GB2396767A8 (en) 2005-03-15
GB2387497A (en) 2003-10-15
GB2396767A (en) 2004-06-30
WO2003065716A3 (en) 2003-12-31

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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)

Free format text: REGISTERED BETWEEN 20090917 AND 20090923

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

Free format text: REGISTERED BETWEEN 20170907 AND 20170913

PCNP Patent ceased through non-payment of renewal fee

Effective date: 20180201