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A Subband Space Constrained Beamformer incorporating Voice Activity Detection

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Author

  • Alan Davis
  • Siow-Yong Low
  • Sven Nordholm
  • Nedelko Grbic

Summary, in English

This paper introduces a new subband adaptive space constrained beamforming structure for use in hands-free speech enhancement applications. The scheme incorporates a space constrained source model and voice activity information through the integration of a voice activity detector (VAD). The VAD information is used to estimate noise covariance information during non-speech periods and to optimally estimate the source power spectral density (PSD), which is used to provide a spectrally optimized constraint on the source. The proposed structure is evaluated in a real car environment, yielding results which compare well to the optimal Wiener solution where full knowledge of the source is known.

Publishing year

2005-03

Language

English

Pages

65-68

Publication/Series

Proceedings. (ICASSP '05). IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005. (Volume:3 )

Volume

3

Document type

Conference paper

Publisher

IEEE - Institute of Electrical and Electronics Engineers Inc.

Topic

  • Signal Processing

Conference name

2005 IEEE International Conference on Acoustics, Speech, and Signal Processing (ICASSP)

Conference date

2005-03-18 - 2005-03-23

Conference place

Philadelphia, PA, United States

Status

Published

ISBN/ISSN/Other

  • ISBN: 0-7803-8874-7