Patent ID: 8374064
Filing Date: 2013-02-12
Classification: G11B

Abstract:
1. A method for copy protection, comprising: providing audiovisual data or audio data to be stored in a plurality of sectors of a record carrier, the record carrier having a file system; providing additional audiovisual data or additional audio data to be stored in a plurality of further sectors of the record carrier; generating a first file of the file system to be stored on the record carrier, the first file referencing a first part of the plurality of sectors and a further first part of the plurality of further sectors, such that when the first file is completely rendered by a playback device for the record carrier, a respective first part of the audiovisual data or audio data and a respective further first part of the additional audiovisual data or additional audio data is reproduced; generating a second file of the file system to be stored on the record carrier, the second file referencing a second part of the plurality of sectors and a further second part of the plurality of further sectors, such that when the second file is completely rendered by a playback device for the record carrier, a respective second part of the audiovisual data or audio data and a respective further second part of the additional audiovisual data or additional audio data is reproduced; determining program instructions to be stored on the record carrier, which when executed by the playback device control the playback device to switch between reading the first file and the second file, wherein, in case the record carrier is an original, the switching is controlled such that only the plurality of sectors are read and none of the further sectors such that none of the additional audiovisual data or additional audio data is reproduced.