Method and apparatus for echo data hiding in audio signals
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United States of America Patent
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Apr 6, 1999
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N/A
app pub date -
May 31, 1996
filing date -
May 31, 1996
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Abstract
A method of hiding information in a host audio signal introduces one or more echoes into the signal. The separation in time between the host signal and an echo is associated with the value of a datum embedded in the signal. The identity of the embedded datum is determined by observing the delay between the host signal and the echo.
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