Unlocking an audiovisual product

Details Unlocking an audiovisual product Unlocking an audiovisual product

2004-06-07

2009-08-11

Tran, Thai (Department: 2621)

Motion video signal processing for recording or reproducing

Local trick play processing

With randomly accessible medium

C386S349000

Reexamination Certificate

active

07574117

ABSTRACT:
Access to an audiovisual product40is controlled by requiring a user to enter an access code80. The audiovisual product40comprises cells420of data whose playback sequence is controlled by a plurality of sequence instructions410each having a predetermined structure location within the audiovisual product. A destination function is applied to the access code80, in order to calculate a destination structure location. Jumping to the calculated location leads to a sequence instruction (e.g. a PGC—Program Chain) to initiate playback of the audiovisual product (e.g. a DVD-Video product).

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