Optimal Gain Filter Design for Perceptual Acoustic Echo Suppressor

Kihyeon KIM  Hanseok KO 

Publication
IEICE TRANSACTIONS on Information and Systems  Vol.E92-D  No.6  pp.1320-1323
Publication Date: 2009/06/01
Online ISSN: 1745-1361
Print ISSN: 0916-8532
Type of Manuscript: LETTER
Category: Speech and Hearing
Keyword: 
acoustic echo cancellation system,  perceptual acoustic echo suppressor,  auditory spectral envelope,  optimally-modified log-spectral amplitude, 

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Summary: 
This Letter proposes an optimal gain filter for the perceptual acoustic echo suppressor. We designed an optimally-modified log-spectral amplitude estimation algorithm for the gain filter in order to achieve robust suppression of echo and noise. A new parameter including information about interferences (echo and noise) of single-talk duration is statistically analyzed, and then the speech absence probability and the a posteriori SNR are judiciously estimated to determine the optimal solution. The experiments show that the proposed gain filter attains a significantly improved reduction of echo and noise with less speech distortion.