Robust and low-cost cascaded non-linear acoustic echo cancellation

This paper addresses the problem of acoustic echo cancellation in non-linear environments. The rst contribution relates to the use of a cascaded model which divides the loudspeaker enclosure microphone system into two main blocks; the rst models the downlink transducers which are assumed to be the main source of nonlinearity. The second block includes the acoustical channel and uplink transducers which are assumed to be linear and have a comparatively longer impulse response and higher time variability. The second contribution is a new non-linear adaptive echo canceler which is based on the cascaded model and has greater robustness to changes in the acoustic channel than an existing power lter approach.

• Type: Journal
• Year: 2011
• Where: ICASSP
• Authors: Moctar Mossi Idrissa, Christelle Yemdji, Nicholas W. D. Evans, Christophe Beaugeant, Philippe Degry
• Keywords: Acoustic Echo Cancellation, ICASSP 2011, Loudspeaker Enclosure Microphone, Non-linear Adaptive Echo, Signal Processing