ES2070188T3 - Procedimiento de codificacion y de descodificacion de señales de video compuestas y dispositivo para su puesta en practica. - Google Patents
Procedimiento de codificacion y de descodificacion de señales de video compuestas y dispositivo para su puesta en practica.Info
- Publication number
- ES2070188T3 ES2070188T3 ES89403552T ES89403552T ES2070188T3 ES 2070188 T3 ES2070188 T3 ES 2070188T3 ES 89403552 T ES89403552 T ES 89403552T ES 89403552 T ES89403552 T ES 89403552T ES 2070188 T3 ES2070188 T3 ES 2070188T3
- Authority
- ES
- Spain
- Prior art keywords
- video signals
- composite video
- coding
- implementation
- decoding procedure
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Computer Security & Cryptography (AREA)
- Multimedia (AREA)
- Signal Processing (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
- Television Systems (AREA)
- Television Signal Processing For Recording (AREA)
- Glass Compositions (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
Abstract
EL PROCEDIMIENTO DEL INVENTO CONSISTE DURANTE LA EMISION DE SEÑALES DE VIDEO COMPUESTAS, EN LA QUE SE INCLUYEN SERIES DE MENSAJES DE ACCESO (ECM1,ECM2), Y DURANTE LA ELIMINACION DE INTERFERENCIAS, QUE SE EFECTUA MEDIANTE UN LECTOR DE TARJETA LA CUAL CONSTA DE DATOS NUMERICOS CODIFICADOS, EN UTILIZAR UN PROCEDIMIENTO INTERACTIVO DE IDENTIFICACION DE UNA SEÑAL NUMERICA.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR8817092A FR2641152B1 (es) | 1988-12-23 | 1988-12-23 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES2070188T3 true ES2070188T3 (es) | 1995-06-01 |
Family
ID=9373355
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES89403552T Expired - Lifetime ES2070188T3 (es) | 1988-12-23 | 1989-12-19 | Procedimiento de codificacion y de descodificacion de señales de video compuestas y dispositivo para su puesta en practica. |
Country Status (11)
Country | Link |
---|---|
EP (1) | EP0375539B1 (es) |
JP (1) | JP2911595B2 (es) |
AT (1) | ATE118950T1 (es) |
BR (1) | BR8907275A (es) |
CA (1) | CA2006459A1 (es) |
DE (1) | DE68921316T2 (es) |
ES (1) | ES2070188T3 (es) |
FR (1) | FR2641152B1 (es) |
MX (1) | MX172194B (es) |
NZ (1) | NZ232005A (es) |
WO (1) | WO1990007845A1 (es) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB9003325D0 (en) * | 1990-02-14 | 1990-04-11 | Enfranchise Sixty Ltd | Apparatus and method for controlling access to broadcast signals |
FR2703552A1 (fr) * | 1993-03-31 | 1994-10-07 | Philips Electronics Nv | Procédé et dispositif pour l'embrouillage et le désembrouillage d'une émission déterminée de télévision. |
FR2750554B1 (fr) * | 1996-06-28 | 1998-08-14 | Thomson Multimedia Sa | Systeme a acces conditionnel et carte a puce permettant un tel acces |
IL123554A (en) * | 1998-03-04 | 2003-01-12 | Nds Ltd | Key delivery in a secure broadcasting system |
BR9912281A (pt) | 1998-07-20 | 2001-04-17 | Canal Plus Sa | Sistema de navegação para um sistema de televisão digital multicanal |
FR2804272B1 (fr) * | 2000-01-25 | 2003-08-01 | Tonna Electronique | Systeme de controle d'acces d'un utilisateur a des programmes videos, transcodeur, decodeur et procede de controle d'acces d'un tel systeme |
WO2001091466A2 (en) | 2000-05-22 | 2001-11-29 | Nds Limited | Dynamically shifting control word |
EP2230845A1 (en) * | 2009-03-16 | 2010-09-22 | Irdeto Access B.V. | Providing control words to a receiver |
CN111310220B (zh) * | 2020-03-12 | 2023-07-28 | 四川大学 | 基于新型三维矢量分解的彩色图像加密方法 |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CA1253616A (en) * | 1982-07-29 | 1989-05-02 | Robert W. Field | Secure coding and decoding system and method for television program signals |
GB2143352A (en) * | 1983-07-15 | 1985-02-06 | Philips Electronic Associated | Authorising coded signals |
GB2151886A (en) * | 1983-12-21 | 1985-07-24 | British Broadcasting Corp | Conditional-access broadcast transmission |
-
1988
- 1988-12-23 FR FR8817092A patent/FR2641152B1/fr not_active Expired - Fee Related
-
1989
- 1989-12-08 WO PCT/FR1989/000636 patent/WO1990007845A1/fr unknown
- 1989-12-08 JP JP2501072A patent/JP2911595B2/ja not_active Expired - Lifetime
- 1989-12-08 BR BR898907275A patent/BR8907275A/pt not_active IP Right Cessation
- 1989-12-19 AT AT89403552T patent/ATE118950T1/de not_active IP Right Cessation
- 1989-12-19 EP EP89403552A patent/EP0375539B1/fr not_active Expired - Lifetime
- 1989-12-19 DE DE68921316T patent/DE68921316T2/de not_active Expired - Fee Related
- 1989-12-19 ES ES89403552T patent/ES2070188T3/es not_active Expired - Lifetime
- 1989-12-21 MX MX018840A patent/MX172194B/es unknown
- 1989-12-21 CA CA002006459A patent/CA2006459A1/fr not_active Abandoned
-
1990
- 1990-01-04 NZ NZ232005A patent/NZ232005A/xx unknown
Also Published As
Publication number | Publication date |
---|---|
BR8907275A (pt) | 1991-03-12 |
EP0375539A1 (fr) | 1990-06-27 |
MX172194B (es) | 1993-12-07 |
CA2006459A1 (fr) | 1990-06-23 |
NZ232005A (en) | 1991-11-26 |
ATE118950T1 (de) | 1995-03-15 |
FR2641152A1 (es) | 1990-06-29 |
JPH03504313A (ja) | 1991-09-19 |
JP2911595B2 (ja) | 1999-06-23 |
DE68921316D1 (de) | 1995-03-30 |
FR2641152B1 (es) | 1996-05-10 |
EP0375539B1 (fr) | 1995-02-22 |
DE68921316T2 (de) | 1995-08-31 |
WO1990007845A1 (fr) | 1990-07-12 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
FG2A | Definitive protection |
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