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Frequency Selective Step-Size Control for Adaptive Echo Cancellation

MPG-Autoren
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Vogel,  J
Department Human Perception, Cognition and Action, Max Planck Institute for Biological Cybernetics, Max Planck Society;

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Zitation

Heckmann, M., Vogel, J., & Kroschel, K. (2000). Frequency Selective Step-Size Control for Adaptive Echo Cancellation. European Signal Processing Conference EUSIPCO 2000, Tampere, Finland.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0013-E463-5
Zusammenfassung
A new algorithm to control the step-size of a frequency domain echo cancellation system is presented. The step-size is controlled via the estimate of the coherence between the microphone signal and the output of the echo cancellation filter. The use of coherence allows an independent step-size control for each frequency bin. Additive local noise correlated with the echo signal and thus corrupting the adaption is monitored by the coherence and the step-size for the adaption is set correspondingly. The algorithm allows better convergence than conventional algorithms due to its frequency selectivity and does not require any a-priori knowledge.