Soft Constrained Subband Beamforming for Hands-Free Speech Enhancement
Blekinge Institute of Technology, Department of Telecommunications and Signal Processing2002 (English)Conference paper (Refereed) Published
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.
Beamforming, Soft Constrained, Adaptive, Subband
IdentifiersURN: urn:nbn:se:bth-10071ISI: 000177510400222Local ID: oai:bth.se:forskinfo478E2FF84C311A15C1256B56000D7073ISBN: 0-7803-7402-9OAI: oai:DiVA.org:bth-10071DiVA: diva2:838093
International Conference of Acoustics, Speech and Signal Processing, ICASSP2002