FR2330236A1 - Un procede de cryptage et de decryptage d'emissions de television et des circuits mettant en oeuvre ce procede - Google Patents

Un procede de cryptage et de decryptage d'emissions de television et des circuits mettant en oeuvre ce procede

Info

Publication number
FR2330236A1
FR2330236A1 FR7534029A FR7534029A FR2330236A1 FR 2330236 A1 FR2330236 A1 FR 2330236A1 FR 7534029 A FR7534029 A FR 7534029A FR 7534029 A FR7534029 A FR 7534029A FR 2330236 A1 FR2330236 A1 FR 2330236A1
Authority
FR
France
Prior art keywords
line
sync
signal
signals
shifting
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
FR7534029A
Other languages
English (en)
Other versions
FR2330236B1 (fr
Inventor
Maurice Remy
Bernard Marti
Michel Mauduit
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.)
Etat Francais
Original Assignee
Etat Francais
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 Etat Francais filed Critical Etat Francais
Priority to FR7534029A priority Critical patent/FR2330236A1/fr
Publication of FR2330236A1 publication Critical patent/FR2330236A1/fr
Application granted granted Critical
Publication of FR2330236B1 publication Critical patent/FR2330236B1/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
    • H04N7/169—Systems operating in the time domain of the television signal
    • H04N7/1693—Systems operating in the time domain of the television signal by displacing synchronisation signals relative to active picture signals or vice versa
FR7534029A 1975-11-03 1975-11-03 Un procede de cryptage et de decryptage d'emissions de television et des circuits mettant en oeuvre ce procede Granted FR2330236A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7534029A FR2330236A1 (fr) 1975-11-03 1975-11-03 Un procede de cryptage et de decryptage d'emissions de television et des circuits mettant en oeuvre ce procede

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7534029A FR2330236A1 (fr) 1975-11-03 1975-11-03 Un procede de cryptage et de decryptage d'emissions de television et des circuits mettant en oeuvre ce procede

Publications (2)

Publication Number Publication Date
FR2330236A1 true FR2330236A1 (fr) 1977-05-27
FR2330236B1 FR2330236B1 (fr) 1982-06-04

Family

ID=9162155

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7534029A Granted FR2330236A1 (fr) 1975-11-03 1975-11-03 Un procede de cryptage et de decryptage d'emissions de television et des circuits mettant en oeuvre ce procede

Country Status (1)

Country Link
FR (1) FR2330236A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2524241A1 (fr) * 1982-03-24 1983-09-30 Radiotechnique Circuit de commande du dispositif de decryptage d'un systeme de transmission d'emissions de television cryptees et systeme de transmission d'emissions cryptees comportant un tel circuit
FR2562365A1 (fr) * 1984-03-30 1985-10-04 Loire Electro Region Pays Circuits de codage et de decodage d'un signal video code par un decalage du signal d'image par rapport au signal de synchronisation
DE3513860A1 (de) * 1984-04-19 1985-10-31 Société d'Electronique de la Région Pays de Loire - Serel, Paris Verfahren zum codieren und decodieren fuer ein muenzfernseh-system
US4736420A (en) * 1986-09-19 1988-04-05 M/A-Com Government Systems, Inc. Video scrambling by segmenting video information lines
WO1993007717A1 (fr) * 1991-09-30 1993-04-15 British Broadcasting Corporation Procede et appareil de transmission discrete de signaux video

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2524241A1 (fr) * 1982-03-24 1983-09-30 Radiotechnique Circuit de commande du dispositif de decryptage d'un systeme de transmission d'emissions de television cryptees et systeme de transmission d'emissions cryptees comportant un tel circuit
FR2562365A1 (fr) * 1984-03-30 1985-10-04 Loire Electro Region Pays Circuits de codage et de decodage d'un signal video code par un decalage du signal d'image par rapport au signal de synchronisation
EP0160595A1 (fr) * 1984-03-30 1985-11-06 Societe Electronique De La Region Pays De Loire Circuits de codage et de décodage d'un signal vidéo codé par un décalage du signal d'image par rapport au signal de synchronisation
DE3513860A1 (de) * 1984-04-19 1985-10-31 Société d'Electronique de la Région Pays de Loire - Serel, Paris Verfahren zum codieren und decodieren fuer ein muenzfernseh-system
US4736420A (en) * 1986-09-19 1988-04-05 M/A-Com Government Systems, Inc. Video scrambling by segmenting video information lines
WO1993007717A1 (fr) * 1991-09-30 1993-04-15 British Broadcasting Corporation Procede et appareil de transmission discrete de signaux video
TR27057A (tr) * 1991-09-30 1994-10-11 Thomson Consumer Electronics Video sistemi kodlayicisi ve kod cözücüsü icin bellek sistemi.
US5555305A (en) * 1991-09-30 1996-09-10 British Broadcasting Corporation Method and apparatus for secure transmission of video signals

Also Published As

Publication number Publication date
FR2330236B1 (fr) 1982-06-04

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Legal Events

Date Code Title Description
TP Transmission of property