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Soft Constrained Subband Beamforming for Hands-Free Speech Enhancement
Responsible organisation
2002 (English)Conference paper (Refereed) Published
Abstract [en]

This paper introduces a new constrained adaptive subband beamformer algorithm for speech enhancement in acoustic telecommunication systems. The solution relies on a pre-calculated source covariance matrix and recursive estimates of background noise- and handsfree signal covariance matrices. The constraint acts as an eye-opening in a vicinity of the near-field location of the source and degradations from steering-vector errors can therefor be made small. The algorithm is applied in subbands using a uniform multi channel over-sampled filterbank. Simulations with real speech recorded in an automobile hands-free environment show 19 dB noise reduction and 20 dB hands-free suppression.

Place, publisher, year, edition, pages
Orlando, Florida: IEEE , 2002.
Keyword [en]
Beamforming, Soft Constrained, Adaptive, Subband
National Category
Signal Processing
URN: urn:nbn:se:bth-10071ISI: 000177510400222Local ID: 0-7803-7402-9OAI: diva2:838093
International Conference of Acoustics, Speech and Signal Processing, ICASSP2002
Available from: 2012-09-18 Created: 2002-02-04 Last updated: 2015-06-30Bibliographically approved

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Signal Processing

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ReferencesLink to record
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