Soft Constrained Subband Beamforming for Hands-Free Speech Enhancement

Nedelko Grbic, Sven Nordholm

Research output: Chapter in Book/Report/Conference proceedingPaper in conference proceedingResearchpeer-review

30 Citations (SciVal)

Abstract

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.
Original languageEnglish
Title of host publicationAcoustics, Speech, and Signal Processing (ICASSP), 2002 IEEE International Conference on
Place of PublicationOrlando, FL, USA
Pages885-888
Number of pages4
Volume1
DOIs
Publication statusPublished - 2002
EventIEEE International Conference on Acoustics, Speech and Signal Processing, 2002 - ORLANDO, FL, Orlando, FL, United States
Duration: 2002 May 132002 May 17

Conference

ConferenceIEEE International Conference on Acoustics, Speech and Signal Processing, 2002
Abbreviated titleICASSP 2002
Country/TerritoryUnited States
CityOrlando, FL
Period2002/05/132002/05/17

Subject classification (UKÄ)

  • Signal Processing

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