Graduate School and Research Center In communication systems

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

Moctar MOSSI IDRISSA - PhD student - MM department

Multimedia Communications

Date: May 20, 2011

Location: Eurecom - salle EN05

This presentation 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 block 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 canceller which is based on the cascaded model and has greater robustness to changes in the acoustic channel than an existing power filter approach.

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

Search