ROBUST AND LOW-COST CASCADED NON-LINEAR ACOUSTIC ECHO CANCELLATION
Presented by: Moctar Mossi Idrissa, Author(s): Moctar Mossi Idrissa, Christelle Yemdji, Nicholas Evans, EURECOM, France; Christophe Beaugeant, Philippe Degry, Infineon, France
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 down-link transducers which are assumed to be the main source of nonlinearity. The second block includes the acoustical channel and up-link 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.