Improved Performance for Stereophonic Acoustic Echo Cancellation using Subband Structure

An adaptive filtering approach is proposed in this paper for stereophonic acoustic echo cancellation (SAEC) in order to obtain convergence rate improvement and computational complexity reduction. The hybrid mono/stereo structure between fast affine projection (FAP) and frequency-domain normalized least mean square (F-NLMS) algorithms is introduced, based on subband adaptive filtering. Simulation results on speech signals suggest that enhanced performance in terms of rate of convergence can be achieved at low computational cost.