GB2216359B - Synchronisation - Google Patents

Synchronisation

Info

Publication number
GB2216359B
GB2216359B GB8806505A GB8806505A GB2216359B GB 2216359 B GB2216359 B GB 2216359B GB 8806505 A GB8806505 A GB 8806505A GB 8806505 A GB8806505 A GB 8806505A GB 2216359 B GB2216359 B GB 2216359B
Authority
GB
United Kingdom
Prior art keywords
synchronisation
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
GB8806505A
Other versions
GB8806505D0 (en
GB2216359A (en
Inventor
Simon Howard Spencer
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.)
BAE Systems Electronics Ltd
Original Assignee
GEC Marconi Ltd
Marconi Co 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 GEC Marconi Ltd, Marconi Co Ltd filed Critical GEC Marconi Ltd
Priority to GB8806505A priority Critical patent/GB2216359B/en
Publication of GB8806505D0 publication Critical patent/GB8806505D0/en
Publication of GB2216359A publication Critical patent/GB2216359A/en
Application granted granted Critical
Publication of GB2216359B publication Critical patent/GB2216359B/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04N7/00—Television systems
    • H04N7/16—Analogue secrecy systems; Analogue subscription systems
    • H04N7/167—Systems rendering the television signal unintelligible and subsequently intelligible
    • H04N7/171—Systems operating in the amplitude domain of the television signal
    • H04N7/1713—Systems operating in the amplitude domain of the television signal by modifying synchronisation signals

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Television Systems (AREA)
GB8806505A 1988-03-18 1988-03-18 Synchronisation Expired - Lifetime GB2216359B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB8806505A GB2216359B (en) 1988-03-18 1988-03-18 Synchronisation

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB8806505A GB2216359B (en) 1988-03-18 1988-03-18 Synchronisation

Publications (3)

Publication Number Publication Date
GB8806505D0 GB8806505D0 (en) 1988-04-20
GB2216359A GB2216359A (en) 1989-10-04
GB2216359B true GB2216359B (en) 1992-05-20

Family

ID=10633689

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8806505A Expired - Lifetime GB2216359B (en) 1988-03-18 1988-03-18 Synchronisation

Country Status (1)

Country Link
GB (1) GB2216359B (en)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1321750A (en) * 1970-11-13 1973-06-27 Philips Electronic Associated Videophone system
GB2038137A (en) * 1978-12-04 1980-07-16 Oak Industries Inc Coding and decoding of TV signals
EP0119751A1 (en) * 1983-02-18 1984-09-26 Sanyo Electric Co., Ltd. Scrambling system of television signal
GB2137451A (en) * 1980-02-01 1984-10-03 Ampex Processing television signals for digital recording
WO1986007225A1 (en) * 1985-05-21 1986-12-04 Scientific Atlanta, Inc. Restoring framing in a communications system

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1321750A (en) * 1970-11-13 1973-06-27 Philips Electronic Associated Videophone system
GB2038137A (en) * 1978-12-04 1980-07-16 Oak Industries Inc Coding and decoding of TV signals
GB2137451A (en) * 1980-02-01 1984-10-03 Ampex Processing television signals for digital recording
EP0119751A1 (en) * 1983-02-18 1984-09-26 Sanyo Electric Co., Ltd. Scrambling system of television signal
WO1986007225A1 (en) * 1985-05-21 1986-12-04 Scientific Atlanta, Inc. Restoring framing in a communications system

Also Published As

Publication number Publication date
GB8806505D0 (en) 1988-04-20
GB2216359A (en) 1989-10-04

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Legal Events

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

Effective date: 19920820