Patent ID: 7793351
Filing Date: 2010-09-07
Classification: G11B

Abstract:
1. A method to deter copying of an audiovisual product, comprising the steps of: allocating a plurality of user identities to a plurality of users; recording the audiovisual product with a plurality of sections of playback content including, for each of the plurality of user identities, at least one section of personal playback content which is uniquely attributable to the respective user identity; recording a navigational structure of the audiovisual product, said navigational structure being adapted for reproducing a said at least one section according to a said user identity, said navigational structure comprising a plurality of sequence instructions to reproduce some or all of the sections of playback content in a specified order; receiving one of the user identities upon playback of the audiovisual product and selecting one of the recorded sequence instructions according to the received user identity, the structural location of the corresponding sequence instruction selected directly from the received user identity or by performing a transformation of the received user identity; and replaying the recorded audiovisual product including selecting and replaying the respective at least one section of personal playback content according to the received user identity.