ES2038913A2 - Sistema de codificacion simultanea de varias senales de television y decodificacion de las mismas en radiofrecuencia. - Google Patents
Sistema de codificacion simultanea de varias senales de television y decodificacion de las mismas en radiofrecuencia.Info
- Publication number
- ES2038913A2 ES2038913A2 ES919102165A ES9102165A ES2038913A2 ES 2038913 A2 ES2038913 A2 ES 2038913A2 ES 919102165 A ES919102165 A ES 919102165A ES 9102165 A ES9102165 A ES 9102165A ES 2038913 A2 ES2038913 A2 ES 2038913A2
- Authority
- ES
- Spain
- Prior art keywords
- radiofrequency
- decoding
- channel
- application
- television signals
- 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
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)
Abstract
SISTEMA DE CODIFICACION SIMULTANEA DE VARIAS SEÑALES DE TELEVISION Y DECODIFICACION DE LAS MISMAS EN RADIOFRECUENCIA. CONSISTENTE EN QUE LA SEÑAL O SEÑALES DE TV EN RADIOFRECUENCIA DESTINADOS A LA DISTRIBUCION, SE SOMETEN AL MENOS UNO DE LOS CANALES A UNA REMODULACION CON UNA SEÑAL QUE MANTIENE SIN CAMBIOS EL PEDESTAL DE SINCRONISMOS Y QUE VARIA DE ACUERDO CON UNA SECUENCIA ESTABLECIDA Y RESIDENTE EN LA MEMORIA DEL CODIFICADOR CON APLICACION DIFERENCIADA A CADA CANAL O AL CONJUNTO, ESTABLECIENDOSE UN CANAL DE DATOS CON INCLUSION DE UN CODIGO DE IDENTIFICACION DEL CANAL, UN CODIGO DE ALGORITMO Y UN CODIGO DE SINCRONIZACION, QUE SON DETERMINANTES PARA QUE EN EL EXTREMO DE USUARIO UN DECODIFICADOR DISPUESTO AL EFECTO INTERPRETE LOS CODIGOS Y APLIQUE OTRA REMODULACION CON FORMA IDENTICA, SINCRONICA E INVERSA A LA DEL DECODIFICADOR PARA RESTITUIR LA SEÑAL ORIGINAL. DE APLICACION EN LA PROTECCION DE CANALES DE TV DISTRIBUIDOS BAJO CUOTA DE ABONADO.
Priority Applications (7)
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. |
FR9212169A 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. |
SE9202779A SE9202779L (sv) | 1991-10-02 | 1992-09-25 | System foer samtidig kodning av ett antal televisionssignaler och avkodning fraan radiofrekvens |
US07/953,518 US5319708A (en) | 1991-10-02 | 1992-09-29 | System for the simultaneous coding of a number of television signals and for decoding thereof in radiofrequency |
GB9220589A 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 |
CA002079514A CA2079514A1 (en) | 1991-10-02 | 1992-09-30 | System for the simultaneous coding a number of television signals and for decoding thereof in radiofrequency |
DE4233114A DE4233114A1 (de) | 1991-10-02 | 1992-10-02 | System zur simultankodierung verschiedener tv-signale und deren dekodierung in hochfrequenz |
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 |
---|---|
ES2038913A2 true ES2038913A2 (es) | 1993-08-01 |
ES2038913R ES2038913R (es) | 1995-11-16 |
ES2038913B1 ES2038913B1 (es) | 1996-05-16 |
Family
ID=8273690
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES09102165A Expired - Lifetime ES2038913B1 (es) | 1991-10-02 | 1991-10-02 | Sistema de codificacion simultanea de varias señales de television y decodificacion de las mismas en radiofrecuencia. |
Country Status (7)
Country | Link |
---|---|
US (1) | US5319708A (es) |
CA (1) | CA2079514A1 (es) |
DE (1) | DE4233114A1 (es) |
ES (1) | ES2038913B1 (es) |
FR (1) | FR2684832A1 (es) |
GB (1) | GB2260247B (es) |
SE (1) | SE9202779L (es) |
Families Citing this family (3)
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 (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0134656A2 (en) * | 1983-07-07 | 1985-03-20 | Sony Corporation | Apparatus for unscrambling protected television pictures |
WO1986005647A1 (en) * | 1985-03-15 | 1986-09-25 | Zenith Electronics Corporation | Television signal scrambling and data transmission system |
US4636852A (en) * | 1984-01-26 | 1987-01-13 | Scientific-Atlanta, Inc. | Scrambling and descrambling of television signals for subscription TV |
US4679078A (en) * | 1983-11-15 | 1987-07-07 | Luks Industrial Company Ltd. | High security subscription television transmission system |
EP0341801A2 (en) * | 1985-10-29 | 1989-11-15 | Payview Limited | Video scrambling systems |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1155518A (en) * | 1979-02-20 | 1983-10-18 | William S.H. Cheung | Encoding of information |
US4598313A (en) * | 1984-10-31 | 1986-07-01 | Zenith Electronics Corporation | Television signal scrambling system |
DE3752343T2 (de) * | 1986-04-18 | 2002-08-14 | Nagra Plus Sa | Bezahlfernsehsystem |
CA1292056C (en) * | 1987-09-07 | 1991-11-12 | Masatoshi Tanaka | Video signal scrambling 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 |
-
1991
- 1991-10-02 ES ES09102165A patent/ES2038913B1/es not_active Expired - Lifetime
-
1992
- 1992-06-11 FR FR9212169A patent/FR2684832A1/fr active Granted
- 1992-09-25 SE SE9202779A patent/SE9202779L/xx not_active Application Discontinuation
- 1992-09-29 US US07/953,518 patent/US5319708A/en not_active Expired - Fee Related
- 1992-09-30 CA CA002079514A patent/CA2079514A1/en not_active Abandoned
- 1992-09-30 GB GB9220589A patent/GB2260247B/en not_active Expired - Fee Related
- 1992-10-02 DE DE4233114A patent/DE4233114A1/de not_active Ceased
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0134656A2 (en) * | 1983-07-07 | 1985-03-20 | Sony Corporation | Apparatus for unscrambling protected television pictures |
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 |
WO1986005647A1 (en) * | 1985-03-15 | 1986-09-25 | Zenith Electronics Corporation | Television signal scrambling and data transmission system |
EP0341801A2 (en) * | 1985-10-29 | 1989-11-15 | Payview Limited | Video scrambling systems |
Also Published As
Publication number | Publication date |
---|---|
DE4233114A1 (de) | 1993-06-09 |
GB2260247A (en) | 1993-04-07 |
FR2684832B1 (es) | 1994-12-23 |
CA2079514A1 (en) | 1993-04-03 |
GB9220589D0 (en) | 1992-11-11 |
SE9202779L (sv) | 1993-04-03 |
SE9202779D0 (sv) | 1992-09-25 |
ES2038913R (es) | 1995-11-16 |
ES2038913B1 (es) | 1996-05-16 |
FR2684832A1 (fr) | 1993-06-11 |
GB2260247B (en) | 1995-03-15 |
US5319708A (en) | 1994-06-07 |
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ES2038913A2 (es) | Sistema de codificacion simultanea de varias senales de television y decodificacion de las mismas en radiofrecuencia. |