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An Acoustic Human-Machine Front-End for Multimedia Applications


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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Correspondence to Wolfgang Herbordt.

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Herbordt, W., Buchner, H. & Kellermann, W. An Acoustic Human-Machine Front-End for Multimedia Applications. EURASIP J. Adv. Signal Process. 2003, 714768 (2003).

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  • hands-free acoustic human-machine front-end
  • microphone arrays
  • robust adaptive beamforming
  • stereophonic acoustic echo cancellation
  • generalized sidelobe canceller
  • frequency-domain adaptive filters