Method and devices for copy protection, copy protected record carrier
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United States of America Patent
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May 14, 2013
Grant Date -
Oct 4, 2012
app pub date -
Feb 13, 2012
filing date -
Mar 31, 2011
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method for copy protection includes providing audiovisual or audio data stored in sectors of a record carrier having a file system, and providing additional or modified data to be stored in further sectors. The method includes generating a first file of the file system referencing at least a part of the sectors and none of the further sectors, so when the first file is rendered by a playback device, the data is reproduced which is included in the part of the sectors. The method also includes generating a second file of the file system being another file than the first file and referencing at least a part of the sectors and further referencing at least one of the further sectors, such that when the second file is rendered by the playback device the part of the sectors and the at least one of the further sectors are reproduced.
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