DocumentCode :
3583405
Title :
RLS-adapted polynomial for nonlinear acoustic echo cancelling
Author :
Stenger, Alexander ; Kellermann, Walter
Author_Institution :
Telecommunications Laboratory, University of Erlangen-Nuremberg, Cauerstrasse 7, 91058 Erlangen, Germany
fYear :
2000
Firstpage :
1
Lastpage :
4
Abstract :
Low-cost audio components in hands-free telephone applications call for nonlinear adaptive echo cancellation. It has been demonstrated that a cascade of a polynomial and an FIR filter can cancel echoes due to nonlinearities of typical low-cost applications [1]. Overcoming the slow convergence of an NLMS-based adaptation [5], we derive an RLS-type adaptation for the polynomial preprocessor. Furthermore, we present a robust control of the RLS algorithm. Experiments with double-talk scenarios and real audio hardware show more than 8 dB overall echo reduction gain and fast and robust convergence of the polynomial. In addition, an implementation with reduced computational complexity and similar robustness is presented.
Keywords :
Finite impulse response filters;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Signal Processing Conference, 2000 10th European
Print_ISBN :
978-952-1504-43-3
Type :
conf
Filename :
7075567
Link To Document :
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