METHOD AND APPARATUS FOR ECHO CANCELLATION
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United States of America Patent
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Issued Date -
May 28, 2009
app pub date -
Nov 17, 2008
filing date -
Nov 28, 2007
priority date (Note) -
Abandoned
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Abstract
A method and apparatus for echo cancellation is disclosed. The apparatus includes an echo compensator and a double talk detector. The echo compensator compensates for associated feedback echo by filtering an echo component from a receiver input signal. The double talk detector provides a control signal based on comparisons of a receiver output signal to a threshold signal and to a transmit signal. The echo compensator also selectively updates filter parameters based on the control signal.
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