Method and device for echo cancellation using power...

Details Method and device for echo cancellation using power... Method and device for echo cancellation using power...

H - Electricity

04

B

H04B 3/23 (2006.01)

Patent

CA 2240726

An echo canceller determines a dynamic threshold (TH(n)) that depends on a non- linear error power estimate (24), and preferably also a linear error power estimate (22). A residual power estimate (28) of a residual signal (e(n)) is compared to this dynamic threshold. The residual signal is attenuated in a non- linear processor (20) if the residual power estimate falls below the dynamic threshold.

Un suppresseur d'écho qui détermine un seuil dynamique (TH(n)) qui repose sur une estimation (24) de puissance d'erreur non linéaire et, de préférence, également sur une estimation de puissance d'erreur linéaire (22). L'estimation (28) de puissance résiduelle d'un signal résiduel (e(n)) est comparée à ce seuil dynamique. Le signal résiduel est atténué dans un processeur non linéaire (20) lorsque l'estimation de puissance résiduelle tombe en deçà du seuil dynamique.

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