Audio with hidden in-band digital data
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United States of America Patent
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May 20, 2003
Grant Date -
Nov 28, 2002
app pub date -
Apr 9, 2002
filing date -
Nov 18, 1993
priority date (Note) -
Expired
status (Latency Note)
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Abstract
Digital audio data is processed to convey plural bits of hidden auxiliary data. The auxiliary data can be used for identification purposes, for device control (disabling recording and the like), etc. The claimed arrangement uses a data embedding technique characterized in that the values of single samples of the audio data are each influenced by the values of several of the bits of auxiliary data. A great variety of other techniques and applications are also detailed.
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