Digital watermark and steganographic decoding
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United States of America Patent
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May 6, 2008
Grant Date -
Oct 19, 2006
app pub date -
Jun 13, 2006
filing date -
May 8, 1995
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
Steganographic signals or digital watermarks are detected from media signals. A media signal may represent audio, video or imagery. In one implementation, a method of detecting a digital watermark in a media signal is provided. The method includes receiving blocks of the media signal; buffering the blocks; screening the blocks for a presence of the digital watermark to identify a plurality of blocks likely to include the digital watermark based on a detection metric; combining the blocks that have been identified as being likely to include the digital watermark; and detecting the watermark from the combined blocks. Other implementations are provided as well.
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