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A Spatially Constrained Subband Beamforming Algorithm for Speech Enhancement

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Author

  • Per Cornelius
  • Zohra Yermeche
  • Nedelko Grbic
  • Ingvar Claesson

Summary, in English

This paper discusses speech enhancement in an enclosed environment such as communication in a motorcycle helmet. A new constrained subband adaptive beamformer is proposed, which uses the concept of an earlier proposed calibrated beamformer mainly developed for a hands-free in-car environment. The highly non-stationary nature of the disturbing sound field encountered in an motorcycle helmet and the fact that the source is situated in the extreme nearfield of the array, causes the beamformer to produce an unwanted fluctuation in the output level. The spatially constrained beamformer proposed in this paper makes sure that the output maintains a constant gain, as long as the corresponding source originates from the desired location.

Publishing year

2004-07

Language

English

Pages

89-93

Publication/Series

Sensor Array and Multichannel Signal Processing Workshop Proceedings, 2004

Document type

Conference paper

Publisher

IEEE - Institute of Electrical and Electronics Engineers Inc.

Conference name

2004 IEEE Sensor Array and Multichannel Signal Processing Workshop

Conference date

2004-07-18 - 2004-07-21

Conference place

Barcelona, Spain

Status

Published

ISBN/ISSN/Other

  • ISBN: 0-7803-8545-4