Moctar Mossi, Christelle Yemdji, Nicholas Evans, Christophe Beaugeant and Philippe Degry
ICASSP 2011, 36th International Conference on Acoustics, Speech and Signal Processing, May 22-27, 2011, Prague, Czech Republic
Abstract: This paper addresses the problem of acoustic echo cancellation in non-linear environments. The first contribution relates to the use of a cascaded model which divides the loudspeaker enclosure microphone system into two main blocks; the first 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 filter approach.