Systems and methods for echo cancellation and echo suppression
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United States of America Patent
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Jan 21, 2014
Grant Date -
Jul 14, 2011
app pub date -
Jan 8, 2010
filing date -
Jan 8, 2010
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Abstract
Traditionally, echo cancellation has employed linear adaptive filters to cancel echoes in a two way communication system. The rate of adaptation is often dynamic and varies over time. Disclosed are novel rates of adaptation that perform well in the presence of background noise, during double talk and with echo path changes. Additionally, the echo or residual echo can further be suppressed with non-linear processing performed using joint frequency-time domain processing.
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