Journal
EURASIP JOURNAL ON APPLIED SIGNAL PROCESSING
Volume 2003, Issue 1, Pages 21-31Publisher
HINDAWI LTD
DOI: 10.1155/S1110865703211094
Keywords
hands-free acoustic human-machine front-end; microphone arrays; robust adaptive beamforming; stereophonic acoustic echo cancellation; generalized sidelobe canceller; frequency-domain adaptive filters
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A concept of robust adaptive beamforming integrating stereophonic acoustic echo cancellation is presented which reconciles the need for low-computational complexity and efficient adaptive filtering with versatility and robustness in real-world scenarios. The synergetic combination of a robust generalized sidelobe canceller and a stereo acoustic echo canceller is designed in the frequency domain based on a general framework for multichannel adaptive filtering in the frequency domain. Theoretical analysis and real-time experiments show the superiority of this concept over comparable time-domain approaches in terms of computational complexity and adaptation behaviour. The real-time implementation confirms that the concept is robust and meets well the practical requirements of real-world scenarios, which makes it a promising candidate for commercial products.
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