Title :
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
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;
Conference_Titel :
Singapore ICCS '94. Conference Proceedings.
Print_ISBN :
0-7803-2046-8
DOI :
10.1109/ICCS.1994.474156
