An adaptive echo cancellation method

Details An adaptive echo cancellation method An adaptive echo cancellation method

H - Electricity

04

B

H04B 3/23 (2006.01)

Patent

CA 2234555

An adaptive echo cancellation method determines a long time aver age (12) of an input signal and a short time average (14) of the same signal, and prevents updating of an adaptive filter if the short time average (14) falls below (24) the long time average.

L'invention porte sur un procédé adaptatif d'annulation des échos établissant sur une longue période la moyenne (12) d'un signal d'entrée, et sur une courte période, la moyenne (14) de ce même signal, et empêchant la mise à jour d'un filtre adaptatif lorsque la moyenne (14) relative à la période courte passe en dessous de la moyenne (12) relative à la période longue.

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