Scrambling unit for a digital transmission system

Details Scrambling unit for a digital transmission system Scrambling unit for a digital transmission system

H - Electricity

04

N

H04N 7/167 (2006.01) H04N 7/24 (2006.01) H04N 7/52 (2006.01)

Patent

CA 2311488

An independant scrambling unit (1) for a digital audiovisual transmission system, the scrambling unit (1) comprising an input for receiving an assembled transport packet stream from a physically seperate multiplexer (4), a scrambling device for scrambling the received transport stream according to a randomising control word and an output for sending the scrambled transport stream to a transmitter means for subsequent transmission. The scrambling unit (1) may also be used to introduce other packet data in the data stream.

L'invention concerne une unité de brouillage indépendante (1) pour système de transmission audiovisuel numérique, qui comprend les éléments suivants : entrée recevant un flux de transport assemblé en mode paquet, depuis un multiplexeur physiquement distinct (4); dispositif de brouillage permettant de brouiller le flux reçu, au moyen d'un mot de contrôle de randomisation; sortie envoyant le flux de transport brouillé à un émetteur, aux fins de transmission ultérieure. L'unité de brouillage (1) peut également être utilisée pour l'injection d'autres données par paquets dans le flux de données.

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