Digital watermark systems and methods
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United States of America Patent
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Jan 29, 2013
Issued Date -
N/A
app pub date -
Oct 23, 2007
filing date -
Feb 20, 1997
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A digital watermark is added to audio or visual content. An illustrative embodiment permutes the content, alters the permuted content to encode a watermark, and inverse-permutes the content 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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