GB9827612D0 - Encription of digital video - Google Patents

Encription of digital video

Info

Publication number
GB9827612D0
GB9827612D0 GBGB9827612.4A GB9827612A GB9827612D0 GB 9827612 D0 GB9827612 D0 GB 9827612D0 GB 9827612 A GB9827612 A GB 9827612A GB 9827612 D0 GB9827612 D0 GB 9827612D0
Authority
GB
United Kingdom
Prior art keywords
encription
digital video
video
digital
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.)
Granted
Application number
GBGB9827612.4A
Other versions
GB2344950B (en
GB2344950A (en
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.)
Snell Advanced Media Ltd
Original Assignee
Snell and Wilcox 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 Snell and Wilcox Ltd filed Critical Snell and Wilcox Ltd
Priority to GB9827612A priority Critical patent/GB2344950B/en
Publication of GB9827612D0 publication Critical patent/GB9827612D0/en
Priority to EP99961212A priority patent/EP1142335A2/en
Priority to AU17898/00A priority patent/AU1789800A/en
Priority to PCT/GB1999/004245 priority patent/WO2000036838A2/en
Publication of GB2344950A publication Critical patent/GB2344950A/en
Application granted granted Critical
Publication of GB2344950B publication Critical patent/GB2344950B/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
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/169—Systems operating in the time domain of the television signal
    • 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
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • 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
    • H04N2005/91357—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal
    • H04N2005/91364—Television signal processing therefor for scrambling ; for copy protection by modifying the video signal the video signal being scrambled

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Television Signal Processing For Recording (AREA)
GB9827612A 1998-12-15 1998-12-15 Encryption of digital video Expired - Fee Related GB2344950B (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB9827612A GB2344950B (en) 1998-12-15 1998-12-15 Encryption of digital video
EP99961212A EP1142335A2 (en) 1998-12-15 1999-12-15 Digital video processing to inhibit unauthorised copies
AU17898/00A AU1789800A (en) 1998-12-15 1999-12-15 Digital video processing
PCT/GB1999/004245 WO2000036838A2 (en) 1998-12-15 1999-12-15 Digital video processing to inhibit unauthorised copies

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9827612A GB2344950B (en) 1998-12-15 1998-12-15 Encryption of digital video

Publications (3)

Publication Number Publication Date
GB9827612D0 true GB9827612D0 (en) 1999-02-10
GB2344950A GB2344950A (en) 2000-06-21
GB2344950B GB2344950B (en) 2003-05-07

Family

ID=10844267

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9827612A Expired - Fee Related GB2344950B (en) 1998-12-15 1998-12-15 Encryption of digital video

Country Status (4)

Country Link
EP (1) EP1142335A2 (en)
AU (1) AU1789800A (en)
GB (1) GB2344950B (en)
WO (1) WO2000036838A2 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2382753A (en) * 2001-12-03 2003-06-04 Sony Uk Ltd Encrypting video data, ensuring that all encrypted data values lie in a legal range

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5757910A (en) * 1993-04-06 1998-05-26 Goldstar Co., Ltd. Apparatus for preventing illegal copying of a digital broadcasting signal
JPH11298878A (en) * 1998-04-08 1999-10-29 Nec Corp Image scrambling method and device therefor

Also Published As

Publication number Publication date
GB2344950B (en) 2003-05-07
WO2000036838A2 (en) 2000-06-22
WO2000036838A3 (en) 2000-10-12
EP1142335A2 (en) 2001-10-10
AU1789800A (en) 2000-07-03
GB2344950A (en) 2000-06-21

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20031215