Digital watermark systems and methods
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United States of America Patent
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Jul 26, 2011
Issued Date -
N/A
app pub date -
Nov 14, 2007
filing date -
Feb 20, 1997
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Abstract
A digital watermark is added to audio or visual content. An illustrative embodiment segments the content, permutes the segments, and transforms such data into another domain. The transformed data is altered slightly to encode a watermark. The altered data can then be inverse-transformed, and inverse-permuted, to return same to substantially its original form. Related watermark decoding methods are also detailed, as are ancillary features and techniques.
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