Copying and playing protection for digital programs

Details Copying and playing protection for digital programs Copying and playing protection for digital programs

G - Physics

11

B

G11B 23/28 (2006.01) G11B 19/04 (2006.01) G11B 20/00 (2006.01) H04N 5/913 (2006.01)

Patent

CA 2232708

A system and method for preventing effective copying of digital recordings. A copy-state code (Fig. 1) accompanies each recording (12), one state of which represents that no copies at all are to be made of the recording. Compatible players (10) are designed to prevent play of any writable disk which includes a "no-copy" code. It is the inconsistency between the code and the medium containing it that causes play of the medium to be inhibited.

L'invention concerne un système et un procédé destinés à empêcher la reproduction effective d'enregistrements numériques. Un code d'état de reproduction accompagne chaque enregistrement (12), un de ces états indiquant qu'aucune reproduction ne doit être faite de l'enregistrement. Des lecteurs compatibles (10) sont conçus pour empêcher la lecture de tout disque pouvant être enregistré et qui comporte un code de non-reproduction. C'est l'incompatibilité entre le code et son support qui empêche la lecture du support.

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