System for decrypting television from several satellites

Details System for decrypting television from several satellites System for decrypting television from several satellites

H - Electricity

04

N

H04N 7/167 (2006.01) H01Q 21/20 (2006.01) H04N 5/46 (2006.01)

Patent

CA 2237304

A system and corresponding method are provided for selecting one of a plurality of simultaneously received encrypted direct broadcast satellite (DBS) signals for decryption annd viewing. A converter box or decrypting device (7) is provided with a plurality of different decrypting smart cards (41) all of which are simultaneously inserted in the converter box (43). The user or viewer scans the received signals and selects one for viewing. The different decrypting algorithms of the different smart cards (41) respectively correspond to the different encryptions of the received DBS signals so that the selected encrypted signal is decrypted by the appropriate and corresponding decrypting smart card (41) and subsequently decompressed and viewed.

Système et procédé correspondant permettant de sélectionner l'un des signaux d'une pluralité de signaux émis par des satellites de télédiffusion directe (DBS), reçus et codés simultanément en vue de les décrypter et les visualiser. Une boîte de conversion ou dispositif de décryptage (7) est équipée d'une pluralité de cartes à puces (41) de décryptage différentes, toutes étant simultanément introduites dans la boîte de conversion (43). L'utilisateur ou spectateur analyse les signaux reçus et en sélectionne un pour le regarder. Les différents algorithmes de décryptage des différentes cartes à puces (41) correspondent respectivement à différents codes des signaux DBS reçus de sorte que le signal codé sélectionné soit décrypté par la carte à puce (41) de décryptage appropriée et correspondante, et soit ensuite décompressé et visualisé.

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