Audio watermarking with covert channel and permutations
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United States of America Patent
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Jun 2, 2009
Grant Date -
N/A
app pub date -
Jul 12, 2000
filing date -
Jul 13, 1999
priority date (Note) -
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Abstract
Audio signals, such as a music clip, are inserted with detectable watermarks. The inserted watermark can identify the content producer and provide a signature embedded in the audio signal and cannot be removed. The watermark can survive all typical kinds of processing and malicious attacks. The watermark can be implemented in a watermarking system that employs a covert channel encoder to layer an additional information data message or covert message on top of the watermark. The watermarking system can also include a permutation technique to further hide the watermark and hide the covert message within the watermark.
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