Open Access

An Acoustic Human-Machine Front-End for Multimedia Applications

EURASIP Journal on Advances in Signal Processing20032003:714768

Received: 31 May 2002

Published: 30 January 2003


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.


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

Authors’ Affiliations

Telecommunications Laboratory, University Erlangen-Nuremberg


© Copyright © 2003 Hindawi Publishing Corporation 2003