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.)
Publication of BE474239ApublicationCriticalpatent/BE474239A/xx
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
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04K—SECRET COMMUNICATION; JAMMING OF COMMUNICATION
H04K1/00—Secret communication
H04K1/02—Secret communication by adding a second signal to make the desired signal unintelligible
H—ELECTRICITY
H04—ELECTRIC COMMUNICATION TECHNIQUE
H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
H04N7/00—Television systems
H04N7/16—Analogue secrecy systems; Analogue subscription systems
