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ROBUST AND LOW-COST CASCADED NON-LINEAR ACOUSTIC ECHO CANCELLATION

Echo Cancellation

Full Paper at IEEE Xplore

Přednášející: Moctar Mossi Idrissa, Autoři: 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.

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