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.)
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.)
Thomson-Brandt SA
Original Assignee
Thomson-Brandt SA
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Filing date
Publication date
Application filed by Thomson-Brandt SAfiledCriticalThomson-Brandt SA
Priority to FR8301069ApriorityCriticalpatent/FR2539938A1/fr
Publication of FR2539938A1publicationCriticalpatent/FR2539938A1/fr
Application grantedgrantedCritical
Publication of FR2539938B1publicationCriticalpatent/FR2539938B1/fr
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 Systems
(AREA)
Compression Or Coding Systems Of Tv Signals
(AREA)
FR8301069A1983-01-251983-01-25Procede de protection du videosignal d'une emission de television notamment a peage et dispositif mettant en oeuvre un tel procede
GrantedFR2539938A1
(fr)