Echo canceller
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United States of America Patent
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-
Jul 20, 2004
Grant Date -
Jan 23, 2003
app pub date -
Mar 13, 2001
filing date -
Mar 13, 2001
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A method of echo cancellation for a signal transmission system in which the size of the step used to adapt filter coefficients is adjusted in accordance with the echo delay and in which stationary signals are avoided by determining when the mean and variance of coefficients obtained from a second order linear predictive coding analysis of successive far end samples exceed preset thresholds.
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