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Acoustic echo cancellation using nonlinear cascade filters

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3 Author(s)
J. -P. Costa ; IUP GMI, Univ. of Avignon, France ; A. Lagrange ; A. Arliaud

The miniaturization of GSM handsets creates nonlinear acoustical echoes between microphones and loudspeakers when the signal level is high (hands-free communication). Several methods including nonlinear cascade filters and a bilinear filter are proposed to compensate these echoes. A bilinear filter is a restricted NARMAX (nonlinear autoregressive moving average with exogenous inputs) filter. We present an evaluation based on the standard ERLE (echo return loss enhancement) measure, between a simple linear adaptive FIR filter and various nonlinear filters. These experiments are carried out first on a simulated communication system, then on experimental signals.

Published in:

Acoustics, Speech, and Signal Processing, 2003. Proceedings. (ICASSP '03). 2003 IEEE International Conference on  (Volume:5 )

Date of Conference:

6-10 April 2003