ES2079053T3 - Procedimiento y aparato para codificar y descodificar una señal de video. - Google Patents

Procedimiento y aparato para codificar y descodificar una señal de video.

Info

Publication number
ES2079053T3
ES2079053T3 ES91810115T ES91810115T ES2079053T3 ES 2079053 T3 ES2079053 T3 ES 2079053T3 ES 91810115 T ES91810115 T ES 91810115T ES 91810115 T ES91810115 T ES 91810115T ES 2079053 T3 ES2079053 T3 ES 2079053T3
Authority
ES
Spain
Prior art keywords
image
line
memory
image line
video signal
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
ES91810115T
Other languages
English (en)
Inventor
Andre Kudelski
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.)
Nagra Plus SA
Original Assignee
Nagra Plus SA
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 Nagra Plus SA filed Critical Nagra Plus SA
Application granted granted Critical
Publication of ES2079053T3 publication Critical patent/ES2079053T3/es
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
    • H04N7/169—Systems operating in the time domain of the television signal
    • H04N7/1696—Systems operating in the time domain of the television signal by changing or reversing the order of active picture signal portions

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Television Signal Processing For Recording (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
  • Picture Signal Circuits (AREA)
  • Studio Circuits (AREA)
  • Details Of Television Scanning (AREA)
  • Television Systems (AREA)

Abstract

PROCESO Y DISPOSITIVO DE RADIOINTERFERENCIA Y DESAPOSICION DE LA RADIOINTERFERENCIA DE UNA SEÑAL DE VIDEO, EN LA QUE, EN LA RECEPCION, SE PREVE UNA MEMORIA (8) QUE COMPRENDE UN NUMERO DETERMINADO DE LINEAS DE MEMORIA, PUDIENDO ALMACENAR CADA LINEA UNA LINEA DE IMAGEN RECIBIDA QUE HA SUFRIDO EN LA EMISION UNA CIERTA ROTACION, EFECTUANDOSE EL ALMACENAMIENTO DE UNA LINEA DE IMAGEN ASI RECIBIDA (Z) DE MANERA A PROVOCAR EL DESALMACENAMIENTO Y EL ENVIO A UN TELEVISOR DE LA LINEA DE IMAGEN ANTERIORMENTE ALMACENADA (X) EN LA LINEA DE MEMORIA QUE HA SUFRIDO OTRA ROTACION, EFECTUANDOSE ESTE DESALMACENAMIENTO SEGUN EL ORDEN NORMAL DE LA LINEA DE IMAGEN EXENTA DE ROTACION, PARA QUE ESTA LINEA (X) SEA ENVIADA DIRECTAMENTE AL TELEVISOR PARA CONSTITUIR LA IMAGEN CLARAMENTE.
ES91810115T 1990-02-21 1991-02-21 Procedimiento y aparato para codificar y descodificar una señal de video. Expired - Lifetime ES2079053T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH564/90A CH683580A5 (fr) 1990-02-21 1990-02-21 Procédé et dispositif d'embrouillage et de désembrouillage d'un signal vidéo.

Publications (1)

Publication Number Publication Date
ES2079053T3 true ES2079053T3 (es) 1996-01-01

Family

ID=4189930

Family Applications (1)

Application Number Title Priority Date Filing Date
ES91810115T Expired - Lifetime ES2079053T3 (es) 1990-02-21 1991-02-21 Procedimiento y aparato para codificar y descodificar una señal de video.

Country Status (7)

Country Link
EP (1) EP0443987B1 (es)
AT (1) ATE129375T1 (es)
CH (1) CH683580A5 (es)
DE (1) DE69113834T2 (es)
DK (1) DK0443987T3 (es)
ES (1) ES2079053T3 (es)
GR (1) GR3018631T3 (es)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
MY108367A (en) * 1991-09-30 1996-09-30 Thomson Consumer Electronics S A Method and apparatus for secure transmisson of video signals.

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4405942A (en) * 1981-02-25 1983-09-20 Telease, Inc. Method and system for secure transmission and reception of video information, particularly for television
EP0115097B1 (fr) * 1982-12-20 1987-06-03 La Radiotechnique Portenseigne Générateur de séquences numériques pseudoaléatoires
US4563702A (en) * 1983-05-27 1986-01-07 M/A-Com Linkabit, Inc. Video signal scrambling and descrambling systems
JPS60102074A (ja) * 1983-11-09 1985-06-06 Nec Corp テレビジヨン映像信号スクランブル方式
FR2561478B1 (fr) * 1984-03-16 1987-06-26 Labo Electronique Physique Dispositif de dechiffrement et de decodage d'images de television codees selon le standard mac et brouillees par application aux signaux video de permutations circulaires
DE3832611C2 (de) * 1987-09-30 1998-05-14 Thomson Brandt Gmbh Verschachtelung eines Videosignals

Also Published As

Publication number Publication date
DE69113834D1 (de) 1995-11-23
DK0443987T3 (da) 1996-01-29
GR3018631T3 (en) 1996-04-30
ATE129375T1 (de) 1995-11-15
EP0443987B1 (fr) 1995-10-18
EP0443987A1 (fr) 1991-08-28
DE69113834T2 (de) 1996-05-23
CH683580A5 (fr) 1994-03-31

Similar Documents

Publication Publication Date Title
GR3023108T3 (en) Video signal scrambling and unscrambling device
US4266243A (en) Scrambling system for television sound signals
EP0304217A3 (en) Video scrambling apparatus & method based on space filling curves
MY108367A (en) Method and apparatus for secure transmisson of video signals.
US4405942A (en) Method and system for secure transmission and reception of video information, particularly for television
JPH0767097A (ja) ビデオ信号のスクランブルおよびディスクランブル装置
GB2268860A (en) Video store and forward on demand apparatus and method
DK469581A (da) Fremgangsmaade og anlaeg til sikret udsendelse og modtagelse af videoinformation isaer til fjernsyn
JPS6041382A (ja) 視覚スクランブリング制御ワ−ド発生方法及びテレビジヨン受像機
US7876899B2 (en) Recoverable digital content degradation: method and apparatus
CA2072260A1 (en) Method of synchronising the pseudo-random binary sequence in a descrambler
EP1833251A3 (en) Security device managed access to information
EP2278805A3 (en) Image signal reproducing method and image signal reproducing apparatus
KR950002470A (ko) 디지탈 텔레비젼 화상의 송수신 또는 저장 장치
GR3018631T3 (en) Method and device for scrambling and descrambling of a video signal.
FR2735317B1 (fr) Procede pour le stockage de donnees numeriques d'accord, circuit, televiseur et magnetoscope pour la mise en oeuvre d'un tel procede
EP0123422A2 (en) Apparatus for scrambling and unscrambling signals
EP0595215B1 (en) Method and system for the encryption of a video picture
EP0469721A3 (en) Mode switching for a memory system with diagnostic scan
JPS6432573A (en) Facsimile equipment
KR950007545A (ko) 영상 신호 스크램블 장치와 디스크램블 장치
KR950023027A (ko) 스크램블드 및 논스크램블드 신호의 동시 처리장치
JPS5773568A (en) Facisimile device
JPS5593370A (en) Document receiver
KR950007546A (ko) 방송신호의 디스크램블링 방법

Legal Events

Date Code Title Description
FG2A Definitive protection

Ref document number: 443987

Country of ref document: ES