Recording of scrambled digital data

Details Recording of scrambled digital data Recording of scrambled digital data

H - Electricity

04

L

H04L 9/00 (2006.01) H04N 5/00 (2006.01) H04N 5/913 (2006.01) H04N 7/16 (2006.01) H04N 7/167 (2006.01) H04N 5/775 (2006.01)

Patent

CA 2318879

A system for transmission and recording of digital data, comprising transmission means (6) adapted to prepare and transmit scrambled digital data together with at least one encrypted control word and a digital recording device (41) adapted to receive and record the scrambled digital data and encrypted control word on a digital support (43), the digital recording device (41) further including an access control means (42) adapted to decrypt the control word and thereafter descramble the digital data during playback. The present invention is particularly, but not exclusively, adapted to the transmission of scrambled audio data to be recorded on a mini disc reader (41).

La présente invention concerne un système de transmission et d'enregistrement de données numériques comprenant un moyen de transmission (6) conçu pour établir et transmettre des données digitales brouillées avec au moins un mot de commande crypté, et un dispositif d'enregistrement numérique (41) étudié pour recevoir et enregistrer les données numériques brouillées et le mot de commande crypté sur un support numérique (43), ce dispositif (41) comportant par ailleurs un moyen de commande d'accès (42) conçu pour décrypter le mot de commande crypté, puis débrouiller les données numériques pendant la lecture. La présente invention convient particulièrement, mais pas exclusivement, pour la transmission de données digitales brouillées à enregistrer sur un lecteur (41) de minidisques.

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