DocumentCode :
2900150
Title :
Coupled adaptive filters for acoustic echo control and noise reduction
Author :
Martin, R. ; Altenhöner, J.
Author_Institution :
Inst. for Commun. Syst. & Data Process., Tech. Hochschule Aachen, Germany
Volume :
5
fYear :
1995
fDate :
9-12 May 1995
Firstpage :
3043
Abstract :
Presents new adaptive algorithms for acoustic echo control and noise reduction which employ one, two, or possibly more microphone signals. The new algorithms accommodate high echo attenuation and lead to implementations with reduced complexity. These algorithms combine a conventional FIR echo canceller with a second NLMS-adapted FIR filter which attenuates residual echoes. The paper presents a one-microphone system with improved echo attenuation and a two-microphone system which attenuates acoustic echoes as well as ambient noise and near end speech reverberation. The algorithms can be interpreted as a frequency selective generalization of the well known voice controlled switch. The paper explains the algorithms and presents experimental results in real acoustic environments
Keywords :
FIR filters; acoustic signal processing; adaptive filters; digital filters; echo suppression; least mean squares methods; microphones; FIR echo canceller; NLMS-adapted FIR filter; acoustic echo control; acoustic echoes; adaptive algorithms; attenuation; complexity; coupled adaptive filters; frequency selective generalization; high echo attenuation; microphone signals; noise reduction; one-microphone system; residual echoes; speech reverberation; two-microphone system; voice controlled switch; Acoustic noise; Adaptive algorithm; Adaptive filters; Attenuation; Echo cancellers; Finite impulse response filter; Microphones; Noise cancellation; Noise reduction; Switches;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1995. ICASSP-95., 1995 International Conference on
Conference_Location :
Detroit, MI
ISSN :
1520-6149
Print_ISBN :
0-7803-2431-5
Type :
conf
DOI :
10.1109/ICASSP.1995.479487
Filename :
479487
Link To Document :
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