GB2260247B - A system for the simultaneous coding of a number of television signals and for decoding thereof in radiofrequency - Google Patents

A system for the simultaneous coding of a number of television signals and for decoding thereof in radiofrequency

Info

Publication number
GB2260247B
GB2260247B GB9220589A GB9220589A GB2260247B GB 2260247 B GB2260247 B GB 2260247B GB 9220589 A GB9220589 A GB 9220589A GB 9220589 A GB9220589 A GB 9220589A GB 2260247 B GB2260247 B GB 2260247B
Authority
GB
United Kingdom
Prior art keywords
radiofrequency
decoding
television signals
simultaneous coding
coding
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
GB9220589A
Other languages
English (en)
Other versions
GB9220589D0 (en
GB2260247A (en
Inventor
Lopez Ricardo Reolid
Follente Emilio Diez
Garcia Jose Luis Carmona
Vinuesa Jesus Javier Fernandez
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of GB9220589D0 publication Critical patent/GB9220589D0/en
Publication of GB2260247A publication Critical patent/GB2260247A/en
Application granted granted Critical
Publication of GB2260247B publication Critical patent/GB2260247B/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
    • H04N7/171—Systems operating in the amplitude domain of the television signal
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Television Systems (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
GB9220589A 1991-10-02 1992-09-30 A system for the simultaneous coding of a number of television signals and for decoding thereof in radiofrequency Expired - Fee Related GB2260247B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ES09102165A ES2038913B1 (es) 1991-10-02 1991-10-02 Sistema de codificacion simultanea de varias señales de television y decodificacion de las mismas en radiofrecuencia.

Publications (3)

Publication Number Publication Date
GB9220589D0 GB9220589D0 (en) 1992-11-11
GB2260247A GB2260247A (en) 1993-04-07
GB2260247B true GB2260247B (en) 1995-03-15

Family

ID=8273690

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9220589A Expired - Fee Related GB2260247B (en) 1991-10-02 1992-09-30 A system for the simultaneous coding of a number of television signals and for decoding thereof in radiofrequency

Country Status (7)

Country Link
US (1) US5319708A (OSRAM)
CA (1) CA2079514A1 (OSRAM)
DE (1) DE4233114A1 (OSRAM)
ES (1) ES2038913B1 (OSRAM)
FR (1) FR2684832A1 (OSRAM)
GB (1) GB2260247B (OSRAM)
SE (1) SE9202779L (OSRAM)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5682426A (en) * 1993-07-12 1997-10-28 California Amplifier Subscriber site method and apparatus for decoding and selective interdiction of television channels
DE69516822D1 (de) * 1994-07-11 2000-06-15 California Amplifier Camarillo Ver- und entschlüsselungsverfahren und -gerät für mehrkanalfernsehsystem
US6574981B2 (en) * 2001-09-24 2003-06-10 Lancer Partnership, Ltd. Beverage dispensing with cold carbonation

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA1155518A (en) * 1979-02-20 1983-10-18 William S.H. Cheung Encoding of information
JPS6016082A (ja) * 1983-07-07 1985-01-26 Sony Corp スクランブルテレビジヨン信号の伝送方式
US4679078A (en) * 1983-11-15 1987-07-07 Luks Industrial Company Ltd. High security subscription television transmission system
US4636852A (en) * 1984-01-26 1987-01-13 Scientific-Atlanta, Inc. Scrambling and descrambling of television signals for subscription TV
US4598313A (en) * 1984-10-31 1986-07-01 Zenith Electronics Corporation Television signal scrambling system
WO1986005647A1 (en) * 1985-03-15 1986-09-25 Zenith Electronics Corporation Television signal scrambling and data transmission system
EP0341801A3 (en) * 1985-10-29 1990-02-07 Payview Limited Video scrambling systems
DE3752343T2 (de) * 1986-04-18 2002-08-14 Nagra Plus S.A., Cheseaux-Sur-Lausanne Bezahlfernsehsystem
US4901351A (en) * 1987-09-07 1990-02-13 Kabushiki Kaisha Toshiba Video signal scramble system
FR2621204B1 (fr) * 1987-09-24 1994-07-01 Aeta Procede et dispositif de cryptage/decryptage analogique d'un signal video analogique
US4914694A (en) * 1988-04-11 1990-04-03 Eidak Corporation Modifying a television signal to inhibit recording/reproduction

Also Published As

Publication number Publication date
ES2038913B1 (es) 1996-05-16
GB9220589D0 (en) 1992-11-11
SE9202779D0 (sv) 1992-09-25
FR2684832B1 (OSRAM) 1994-12-23
SE9202779L (sv) 1993-04-03
ES2038913R (OSRAM) 1995-11-16
DE4233114A1 (de) 1993-06-09
FR2684832A1 (fr) 1993-06-11
CA2079514A1 (en) 1993-04-03
ES2038913A2 (es) 1993-08-01
GB2260247A (en) 1993-04-07
US5319708A (en) 1994-06-07

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Legal Events

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

Effective date: 19970930