A subband echo cancellation system

Author

Meana, Hector Perez ; Miyatake, Mariko Nakano ; Balbuena, L.O. ; Gonzalez, Alejandro Martinez ; Sanchez, Gonzalo Duchen

Author_Institution

Div. of Basic Sci. & Eng., Univ. Autonoma Metropolitana, Mexico City, Mexico

Volume

2

fYear

1994

fDate

14-18 Nov 1994

Firstpage

830

Abstract

A short delay subband echo canceler structure is proposed. The proposed structure is based on computing two errors, one for using during single-talk and the other one for using during double-talk. With the subband echo canceler structure we propose a time varying step size LMS algorithm, which reduces distortion during double-talk without increasing the computational cost nor decreasing the convergence rate of the conventional normalized LMS algorithm. Simulation results using white noise and actual speech signals are given to show the desirable features of proposed scheme

Keywords

FIR filters; acoustic signal processing; adaptive filters; convergence of numerical methods; echo suppression; filtering theory; least mean squares methods; speech processing; white noise; adaptive filter; computational cost; convergence rate; digital filter; distortion reduction; double-talk; normalized LMS algorithm; short delay subband echo canceler; simulation results; single-talk; speech signals; subband echo cancellation system; time varying step size LMS algorithm; white noise; Acoustic distortion; Attenuation; Band pass filters; Computational efficiency; Convergence; Delay; Echo cancellers; Filter bank; Least squares approximation; Switches;

fLanguage

English

Publisher

ieee

Conference_Titel

Singapore ICCS '94. Conference Proceedings.

Print_ISBN

0-7803-2046-8

Type

conf

DOI

10.1109/ICCS.1994.474156

Filename

474156