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An Acoustic Human-Machine Front-End for Multimedia Applications

  • Wolfgang HerbordtEmail author
  • Herbert Buchner
  • Walter Kellermann
Open Access
Research Article
Part of the following topical collections:
  1. Multimedia Signal Processing

Abstract

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.

Keywords

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

Copyright information

© Copyright © 2003 Hindawi Publishing Corporation 2003

Authors and Affiliations

  • Wolfgang Herbordt
    • 1
    Email author
  • Herbert Buchner
    • 1
  • Walter Kellermann
    • 1
  1. 1.Telecommunications LaboratoryUniversity Erlangen-NurembergErlangenGermany

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