GB2249689B - Encryption of film - Google Patents

Encryption of film

Info

Publication number
GB2249689B
GB2249689B GB9024126A GB9024126A GB2249689B GB 2249689 B GB2249689 B GB 2249689B GB 9024126 A GB9024126 A GB 9024126A GB 9024126 A GB9024126 A GB 9024126A GB 2249689 B GB2249689 B GB 2249689B
Authority
GB
United Kingdom
Prior art keywords
encryption
film
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
GB9024126A
Other versions
GB9024126D0 (en
GB2249689A (en
Inventor
Terence William Mead
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.)
Rank Cintel Ltd
Original Assignee
Rank Cintel 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 Rank Cintel Ltd filed Critical Rank Cintel Ltd
Priority to GB9024126A priority Critical patent/GB2249689B/en
Publication of GB9024126D0 publication Critical patent/GB9024126D0/en
Publication of GB2249689A publication Critical patent/GB2249689A/en
Application granted granted Critical
Publication of GB2249689B publication Critical patent/GB2249689B/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
    • H04N7/1675—Providing digital key or authorisation information for generation or regeneration of the scrambling sequence
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/222—Studio circuitry; Studio devices; Studio equipment
    • H04N5/257—Picture signal generators using flying-spot scanners
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00—Details of television systems
    • H04N5/76—Television signal recording
    • H04N5/84—Television signal recording using optical recording
    • H04N5/87—Producing a motion picture film from a 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
    • 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)
  • Computer Security & Cryptography (AREA)
  • Studio Devices (AREA)
  • Television Signal Processing For Recording (AREA)
GB9024126A 1990-11-06 1990-11-06 Encryption of film Expired - Fee Related GB2249689B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9024126A GB2249689B (en) 1990-11-06 1990-11-06 Encryption of film

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9024126A GB2249689B (en) 1990-11-06 1990-11-06 Encryption of film

Publications (3)

Publication Number Publication Date
GB9024126D0 GB9024126D0 (en) 1990-12-19
GB2249689A GB2249689A (en) 1992-05-13
GB2249689B true GB2249689B (en) 1994-07-06

Family

ID=10684955

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9024126A Expired - Fee Related GB2249689B (en) 1990-11-06 1990-11-06 Encryption of film

Country Status (1)

Country Link
GB (1) GB2249689B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6091446A (en) 1992-01-21 2000-07-18 Walker; Bradley William Consecutive frame scanning of cinematographic film

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6222926B1 (en) * 1996-12-18 2001-04-24 Philips Electronics North America Corporation Method and device for providing controlled access video signals without providing a signal in the clear
US6226384B1 (en) * 1996-12-18 2001-05-01 Philips Electronics North America Corporation Method and device for providing controlled access video signals without providing a signal in the clear

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6091446A (en) 1992-01-21 2000-07-18 Walker; Bradley William Consecutive frame scanning of cinematographic film

Also Published As

Publication number Publication date
GB9024126D0 (en) 1990-12-19
GB2249689A (en) 1992-05-13

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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)
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20001106