International Workshop on Hands-Free Speech Communication (HSC2001) April 9-11, 2001 Kyoto, Japan

An Efficient Combination of Multi-Channel Acoustic Echo Cancellation with a Beamforming Microphone Array

H. Buchner, W. Herbordt, and W. Kellermann

Telecommunications Laboratory, University of Erlangen-Nuremberg, Germany

For hands-free man-machine audio interfaces with multi-channel sound reproduction and automatic speech recognition (ASR), both a multi-channel acoustic echo canceller (M-C AEC) and a beam-forming microphone array are necessary for sufficient recognition rates. Based on known strategies for combining single-channel AEC and adaptive beamfonning microphone arrays, we discuss special aspects for the extension to multi-channel AEC and propose an efficient system that can be implemented on a regular PC.

Full Paper

Bibliographic reference.  Buchner, H. / Herbordt, W. / Kellermann, Walter (2001): "An efficient combination of multi-channel acoustic echo cancellation with a beamforming microphone array", In HSC2001, 55-58.