Method and devices for copy protection, copy protected record carrier
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United States of America Patent
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Feb 12, 2013
Grant Date -
Oct 4, 2012
app pub date -
Feb 13, 2012
filing date -
Mar 31, 2011
priority date (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 data to be stored in further sectors. The method includes generating first and second files referencing respective first and second parts of the sectors and respective further first and second parts of the further sectors, so when the first and second files are completely rendered by a playback device, respective first and second parts of the data and respective further first and second parts of the additional data are reproduced. The method also includes determining program instructions, which when executed by the playback device, control switching between reading the first file and the second file, and when the record carrier is an original, switching is controlled so only the sectors and none of the further sectors are read such that no additional data is reproduced.
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