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http://dx.doi.org/10.5573/ieek.2013.50.12.205

Nonlinear Acoustic Echo Suppressor based on Volterra Filter using Least Squares  

Park, Jihwan (Department of Electronics and Computer Engineering, Hanyang University)
Lee, Bong-Ki (Department of Electronics and Computer Engineering, Hanyang University)
Chang, Joon-Hyuk (Department of Electronics and Computer Engineering, Hanyang University)
Publication Information
Journal of the Institute of Electronics and Information Engineers / v.50, no.12, 2013 , pp. 205-209 More about this Journal
Abstract
A conventional acoustic echo suppressor (AES) considering only room impulse response between a loudspeaker and a microphone eliminates acoustic echo from the microphone input. However, in a nonlinear acoustic echo environment, the conventional AES degraded because of a nonlinearity of the loudspeaker. In this paper, we adopt AES based on the frequency-domain second-order Volterra filter using Least Square method. For comparing performances, we conduct objective tests including Echo Return Loss Enhancement (ERLE) and Speech Attenuation (SA). The proposed algorithm shows better performance than the conventional in both linear and nonlinear acoustic echo environments.
Keywords
Nonlinear acoustic echo suppressor; Least squares; Volterra filter;
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