Determining transformations of media signals with embedded code signals
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United States of America Patent
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Jul 23, 2002
Issued Date -
N/A
app pub date -
May 8, 2000
filing date -
May 16, 1996
priority date (Note) -
Expired
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Abstract
An embedded signal detection process determines a transformation of a media signal subsequent to the encoding of an embedded code signal into the media signal. The process performs a logarithmic sampling of the media signal to create a sampled signal in which scaling of the media signal is converted to translation in the sampled signal. It then computes the translation of the embedded code signal in the sampled signal to determine scaling of the media signal subsequent to the encoding of the embedded signal in the media signal.
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