Residual Echo Power Spectral Density Estimation Based on an Optimal Smoothed Misalignment for Acoustic Echo Cancellation

Authors:

Abstract:

For echo cancelation enhanced by a Post-Filter it is necessary to get a reliable estimate of the (residual) echo power spectral density (PSD). We describe a method to obtain the echo PSD by an estimation of the system misalignment. For room impulse responses longer than the DFTlength a partitioned processing is necessary. Our contribution addresses problems concerning the partitioned calculation of the system misalignment and proposes an algorithm for obtaining the system misalignment by an optimal frequency dependent first order recursive smoothing criteria based on a minimum mean squared error (MMSE) approach.

Document type:

Conference Paper

Publication:

Eindhoven, Netherlands, 12. - 15. September 2005

Conference:

International Workshop on Acoustic Echo and Noise Control (IWAENC 05)

Pages:

209-212

Index:

246

Files:

Paper