Herbordt W, Kellermann W (2002)
Publication Status: Published
Publication Type: Journal article, Original article
Publication year: 2002
Publisher: John Wiley & Sons
Book Volume: 13
Pages Range: 123-132
Journal Issue: 2
URI: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=0041401268&origin=inward
For hands-free acoustic human/machine interfaces, as required, e.g., for automatic speech recognition, teleconferencing, and other multimedia services, microphone arrays using generalized sidelobe cancellers (GSCs) in conjunction with acoustic echo cancellation (AEC) can be efficiently applied for optimum communication. This contribution first devises a new structure for combining AEC and GSC in the frequency domain. We show that computational complexity is reduced by more than a factor of ten compared to a time-domain arrangement. Second, robustness issues of the GSC adaptation mechanism are addressed. We illustrate how robust adaptation is assured in the new structure. Third, we propose alternatives for the fixed beamformer part of the GSC, which allow to specify (a) the width of the target tracking region and (b) improve the suppression of low frequencies. GSC robustness constraints are included using linear optimization with configurable penalty functions.
APA:
Herbordt, W., & Kellermann, W. (2002). Frequency-domain integration of acoustic echo cancellation and a generalized sidelobe canceller with improved robustness. European Transactions on Telecommunications, 13(2), 123-132.
MLA:
Herbordt, Wolfgang, and Walter Kellermann. "Frequency-domain integration of acoustic echo cancellation and a generalized sidelobe canceller with improved robustness." European Transactions on Telecommunications 13.2 (2002): 123-132.
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