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Beamforming for moving source speech enhancement

Yermeche, Zohra; Grbic, Nedelko LU and Claesson, Ingvar LU (2005) In IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, 2005. p.25-28
Abstract
This paper presents a new constrained subband beamforming algorithm to enhance speech signals generated by a moving source in a noisy environment. The beamformer is based on the principle of a soft constraint defined for a specified region corresponding to a known source location. The soft constraint secures the spatial-temporal passage of the desired source signal in the adaptive update of the beamforming weights and guarantees the full rank property of the matrix inverted in the update. The source of interest is modelled as a cluster of stationary point sources and source motion is accommodated by revising the point source cluster. The source modelling and its direct exploitation in the beamformer through covariance estimates are... (More)
This paper presents a new constrained subband beamforming algorithm to enhance speech signals generated by a moving source in a noisy environment. The beamformer is based on the principle of a soft constraint defined for a specified region corresponding to a known source location. The soft constraint secures the spatial-temporal passage of the desired source signal in the adaptive update of the beamforming weights and guarantees the full rank property of the matrix inverted in the update. The source of interest is modelled as a cluster of stationary point sources and source motion is accommodated by revising the point source cluster. The source modelling and its direct exploitation in the beamformer through covariance estimates are presented. An algorithm for sound source localization is used for speaker movement tracking and this information is exploited to update the spatial distribution in the source model. Evaluation in a real environment with a moving speaker shows a significant noise and hands-free interference suppression within the conventional telephone bandwidth. This is achieved with a negligible impact on speech distortion. (Less)
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author
organization
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, 2005.
pages
4 pages
external identifiers
  • Scopus:33749075189
ISBN
0-7803-9154-3
DOI
10.1109/ASPAA.2005.1540159
language
English
LU publication?
yes
id
75dc5c82-d9e1-4f9d-8866-64550115c75e
date added to LUP
2016-06-23 16:11:55
date last changed
2017-01-01 08:29:03
@inproceedings{75dc5c82-d9e1-4f9d-8866-64550115c75e,
  abstract     = {This paper presents a new constrained subband beamforming algorithm to enhance speech signals generated by a moving source in a noisy environment. The beamformer is based on the principle of a soft constraint defined for a specified region corresponding to a known source location. The soft constraint secures the spatial-temporal passage of the desired source signal in the adaptive update of the beamforming weights and guarantees the full rank property of the matrix inverted in the update. The source of interest is modelled as a cluster of stationary point sources and source motion is accommodated by revising the point source cluster. The source modelling and its direct exploitation in the beamformer through covariance estimates are presented. An algorithm for sound source localization is used for speaker movement tracking and this information is exploited to update the spatial distribution in the source model. Evaluation in a real environment with a moving speaker shows a significant noise and hands-free interference suppression within the conventional telephone bandwidth. This is achieved with a negligible impact on speech distortion.},
  author       = {Yermeche, Zohra and Grbic, Nedelko and Claesson, Ingvar},
  booktitle    = {IEEE Workshop on Applications of Signal Processing to Audio and Acoustics, 2005.},
  isbn         = {0-7803-9154-3},
  language     = {eng},
  pages        = {25--28},
  title        = {Beamforming for moving source speech enhancement},
  url          = {http://dx.doi.org/10.1109/ASPAA.2005.1540159},
  year         = {2005},
}