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Machine translation
1. (WO1981002499) METHOD AND SYSTEM FOR SECURE TRANSMISSION AND RECEPTION OF VIDEO INFORMATION PARTICULARLY FOR TELEVISION
Latest bibliographic data on file with the International Bureau   

Pub. No.:    WO/1981/002499    International Application No.:    PCT/US1981/000227
Publication Date: 03.09.1981 International Filing Date: 25.02.1981
IPC:
H04N 7/169 (2011.01)
Applicants:
Inventors:
Priority Data:
124656 25.02.1980 US
Title (EN) METHOD AND SYSTEM FOR SECURE TRANSMISSION AND RECEPTION OF VIDEO INFORMATION PARTICULARLY FOR TELEVISION
(FR) PROCEDE ET SYSTEME PERMETTANT D'OBTENIR UNE TRANSMISSION ET UNE RECEPTION SURES DE L'INFORMATION VIDEO, NOTAMMENT POUR LA TELEVISION
Abstract: front page image
(EN)A method and a system for secure transmission and reception of a video signal wherein parts (L22, L23...; S1, S2...;) of the video signal arranged in a first predetermined sequence are delayed in relation to each other to form an encoded video signal having its parts rearranged in sequence relative to their positions in the first predetermined sequence. Rearrangement of the video signal parts is accomplished by storing successive parts of the video signal in a storage device (100) and retrieving the stored parts so that the transmitted video signal has its parts arranged in a sequence other than their normal sequence. A decoder (260) at a remote location is provided for receiving and restoring the transmitted sequence of video signal parts to its original sequence. In a television scrambling system, the parts of the video signal are fields, lines (L22, L23...) or segments of lines (S 1, S2...), and rearrangement of the sequence of video signal parts is accomplished on a line segment, line or field basis. Codes (CODE I.D.) may be transmitted to the remote location with the video signal or otherwise to indicate the manner in which the parts of the video signal have been rearranged.
(FR)Procede et systeme permettant d'obtenir une transmission et une reception sures d'un signal video dans lequel des parties (L22, L23...; S1, S2...;) du signal video dispose dans une premiere sequence predeterminee sans retarder l'un par rapport a l'autre de maniere a former un signal video code dont les parties sont prearrangees dans une sequence relative a leurs positions dans la premiere sequence predeterminee. Le rearrangement des parties du signal video est obtenu en stockant des parties successives du signal video dans un dispositif de stockage (100) et en recuperant les parties stockees de maniere que les parties du signal video transmis soient disposees dans une sequence differente de leur sequence normale. Un decodeur (260) est prevu a un emplacement eloigne pour recevoir et retablir la sequence des parties du signal video transmis selon leur sequence originale. Dans un systeme de brouillage de television, les parties du signal video sont constituees par des champs, des lignes (L22, L23...;) ou des segments de lignes (S1, S2...), et le rearrangement de la sequence des parties du signal video est execute en fonction d'un segment de lignes, d'une ligne ou d'un champ. Des codes (CODE I.D.) peuvent etre transmis a l'emplacement eloigne en meme temps que le signal video ou d'une maniere differente pour indiquer de quelle facon les parties du signal video ont ete rearrangees.
Designated States:
Publication Language: English (EN)
Filing Language: English (EN)