Detecting a watermark using a subset of available detection methods
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United States of America Patent
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Issued Date -
Dec 28, 2006
app pub date -
Aug 13, 2005
filing date -
Aug 19, 2003
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
A system and method are disclosed for detecting watermarked content that also inhibits the successful removal or corruption of the watermark. The method involves utilizing only a subset of candidate counter watermark detection techniques within any particular watermark detector to search for the watermark in an altered form. Since only a subset of counter watermark detection techniques is selected from a larger pool of techniques, a bootlegger will be unaware of the total number of transformations available to the watermark detectors and will therefore not know if the watermark has been successfully removed or corrupted. Thus, it will not be possible for a bootlegger to verify the removal or corruption of the watermark by simply playing out the content through a watermark detection device.
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