Encoding and decoding auxiliary signals
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United States of America Patent
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Apr 27, 2010
Grant Date -
Sep 17, 2009
app pub date -
Feb 9, 2009
filing date -
Apr 25, 2001
priority date (Note) -
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Abstract
This disclosure describes methods and systems for encoding and decoding signals from a host signal such as audio, video or imagery. One claim recites a method comprising: receiving a host signal carrying an auxiliary signal; extracting data representing at least some features of the host signal, said extracting utilizes one or more processors; using the data representing at least some features of the host signal to determine a key; and detecting the auxiliary signal in a transform domain associated with the key, the detecting utilizes one or more processors. Other claims and combinations are provided as well.
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