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Soft Constrained Subband Beamforming for Hands-Free Speech Enhancement

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Author

  • Nedelko Grbic
  • Sven Nordholm

Summary, in English

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.

Publishing year

2002

Language

English

Pages

885-888

Publication/Series

Acoustics, Speech, and Signal Processing (ICASSP), 2002 IEEE International Conference on

Volume

1

Document type

Conference paper

Topic

  • Signal Processing

Conference name

IEEE International Conference on Acoustics, Speech and Signal Processing, 2002

Conference date

2002-05-13 - 2002-05-17

Conference place

Orlando, FL, United States

Status

Published

ISBN/ISSN/Other

  • ISBN: 0-7803-7402-9