Subband echo cancellation method using projection algorithm

Details Subband echo cancellation method using projection algorithm Subband echo cancellation method using projection algorithm

H - Electricity

04

B

H04B 3/23 (2006.01) G10K 11/16 (2006.01) H04B 3/21 (2006.01) H04M 9/08 (2006.01)

Patent

CA 2174366

A received signal is output to an echo path and, at the same time, it is divided into a plurality of subbands to generate subband received signals, which are applied to estimated echo paths in the respective subbands to produce echo replicas. The echo having propagated over the echo path is divided into a plurality of subbands to generate subband echoes, from which the corresponding echo replicas are subtracted to produce misalignment signals. Based on the subband received signal in each subband and the misalignment signal corresponding thereto, a coefficient to be provided to each estimated echo path is adjusted by a projection or ES projection algorithm.

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