Device for scrambling mpeg-4-type audio-visual and multimedia content
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United States of America Patent
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Issued Date -
Nov 3, 2005
app pub date -
Mar 29, 2005
filing date -
Aug 6, 2002
priority date (Note) -
Abandoned
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Abstract
A process for distributing video sequences according to a nominal stream format that describes a plurality of audiovisual scenes, each scene formed from a plurality of hierarchical audiovisual objects and a describer of the hierarchy and spatial and temporal relationships between the objects, with each video object comprising at least one digital plane P, including analyzing the nominal stream to generate a first modified stream having a format ofthe nominal stream and having planes P, B or S (GMC) containing macroblocks of which all or part of values of movement vectors were modified, generating a second stream with any format comprising digital information to permit reconstruction of the modified planes, separately transmitting the two streams from the server to addressed equipment, and calculating a synthesis of a stream to the nominal format on the addressed equipment as a function of the first and second streams.
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