FR2684832A1 - Systeme de codage simultane de divers signaux de television et de decodage de ceux-ci en radio-frequence. - Google Patents

Systeme de codage simultane de divers signaux de television et de decodage de ceux-ci en radio-frequence. Download PDF

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Publication number
FR2684832A1
FR2684832A1 FR9212169A FR9212169A FR2684832A1 FR 2684832 A1 FR2684832 A1 FR 2684832A1 FR 9212169 A FR9212169 A FR 9212169A FR 9212169 A FR9212169 A FR 9212169A FR 2684832 A1 FR2684832 A1 FR 2684832A1
Authority
FR
France
Prior art keywords
signal
coding
signals
modulated
lines
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
FR9212169A
Other languages
English (en)
French (fr)
Other versions
FR2684832B1 (enExample
Inventor
Ricardo Reolid Lopez
Reolid Lopez Ricardo
Emilio Diez Follente
Diez Follente Emilio
Luis Carmona Garcia Jose
Carmona Garcia Jose Luis
Javier Fernandez Vinuesa Jesus
Fernandez Vinuesa Jesus Javier
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.)
FERNANDEZ VINUESA JESUS
Original Assignee
FERNANDEZ VINUESA JESUS
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 FERNANDEZ VINUESA JESUS filed Critical FERNANDEZ VINUESA JESUS
Publication of FR2684832A1 publication Critical patent/FR2684832A1/fr
Application granted granted Critical
Publication of FR2684832B1 publication Critical patent/FR2684832B1/fr
Granted 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)
FR9212169A 1991-10-02 1992-06-11 Systeme de codage simultane de divers signaux de television et de decodage de ceux-ci en radio-frequence. Granted FR2684832A1 (fr)

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 (2)

Publication Number Publication Date
FR2684832A1 true FR2684832A1 (fr) 1993-06-11
FR2684832B1 FR2684832B1 (enExample) 1994-12-23

Family

ID=8273690

Family Applications (1)

Application Number Title Priority Date Filing Date
FR9212169A Granted FR2684832A1 (fr) 1991-10-02 1992-06-11 Systeme de codage simultane de divers signaux de television et de decodage de ceux-ci en radio-frequence.

Country Status (7)

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

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
WO1996002111A1 (en) * 1994-07-11 1996-01-25 California Amplifier Encryption/decryption process and apparatus for a multichannel television system
US6574981B2 (en) * 2001-09-24 2003-06-10 Lancer Partnership, Ltd. Beverage dispensing with cold carbonation

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0134656A2 (en) * 1983-07-07 1985-03-20 Sony Corporation Apparatus for unscrambling protected television pictures
US4636852A (en) * 1984-01-26 1987-01-13 Scientific-Atlanta, Inc. Scrambling and descrambling of television signals for subscription TV

Family Cites Families (9)

* 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
US4679078A (en) * 1983-11-15 1987-07-07 Luks Industrial Company Ltd. High security subscription television transmission system
US4598313A (en) * 1984-10-31 1986-07-01 Zenith Electronics Corporation Television signal scrambling system
DE3685621T2 (de) * 1985-03-15 1993-01-28 Zenith Electronics Corp Fernsehsignal-verschluesselungs- und datenuebertragungsanordnung.
EP0341801A3 (en) * 1985-10-29 1990-02-07 Payview Limited Video scrambling systems
EP0243312B1 (fr) * 1986-04-18 1995-07-19 Nagra Plus S.A. Décodeur pour un système de télévision à péage
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

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0134656A2 (en) * 1983-07-07 1985-03-20 Sony Corporation Apparatus for unscrambling protected television pictures
US4636852A (en) * 1984-01-26 1987-01-13 Scientific-Atlanta, Inc. Scrambling and descrambling of television signals for subscription TV

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
FUNKSCHAU vol. 57, no. 8, Avril 1985, MüNCHEN, DE pages 58 - 61 G. BOCK 'Entschlüsseln von Pay-TV Fernsehsignalen: So funktioniert Scrambling' *

Also Published As

Publication number Publication date
SE9202779L (sv) 1993-04-03
GB2260247A (en) 1993-04-07
ES2038913R (enExample) 1995-11-16
DE4233114A1 (de) 1993-06-09
GB9220589D0 (en) 1992-11-11
FR2684832B1 (enExample) 1994-12-23
ES2038913A2 (es) 1993-08-01
SE9202779D0 (sv) 1992-09-25
ES2038913B1 (es) 1996-05-16
US5319708A (en) 1994-06-07
GB2260247B (en) 1995-03-15
CA2079514A1 (en) 1993-04-03

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