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Robust microphone array using subband adaptive beamformer and spectral subtraction

Low, Siow-Yong; Grbic, Nedelko LU and Nordholm, Sven (2002) ICCS 2002 - 8th IEEE International Conference on Communications Systems In The 8th International Conference on of Communication Systems, 2002. ICCS 2002. 2. p.1020-1024
Abstract
This paper presents a new robust microphone array to enhance speech signal under the influence of noise and jammer(s). The proposed structure comprises of a soft constrained subband beamformer, a blocking system and a non-coherent processing technique. The soft constrained beamformer enhances the desired speech signal in a specified region by suppressing all side-lobes. This enhanced signal is then used as a reference signal by the blocking system to estimate the interference spectrum. Finally, the beamformer's output is spectral subtracted using the estimated interference spectrum. Simulations in a real office environment show higher interference suppression level compared to those obtained using the soft constrained beamformer only. Most... (More)
This paper presents a new robust microphone array to enhance speech signal under the influence of noise and jammer(s). The proposed structure comprises of a soft constrained subband beamformer, a blocking system and a non-coherent processing technique. The soft constrained beamformer enhances the desired speech signal in a specified region by suppressing all side-lobes. This enhanced signal is then used as a reference signal by the blocking system to estimate the interference spectrum. Finally, the beamformer's output is spectral subtracted using the estimated interference spectrum. Simulations in a real office environment show higher interference suppression level compared to those obtained using the soft constrained beamformer only. Most importantly. this is achieved with negligible expense on target signal distortion. (Less)
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author
publishing date
type
Chapter in Book/Report/Conference proceeding
publication status
published
subject
in
The 8th International Conference on of Communication Systems, 2002. ICCS 2002.
volume
2
pages
5 pages
publisher
IEEE--Institute of Electrical and Electronics Engineers Inc.
conference name
ICCS 2002 - 8th IEEE International Conference on Communications Systems
ISBN
0-7803-7510-6
DOI
10.1109/ICCS.2002.1183287
language
English
LU publication?
no
id
9cfe2e04-76a2-4d4c-acf1-017b3df364b4
date added to LUP
2016-06-23 15:24:09
date last changed
2016-11-09 08:25:30
@inproceedings{9cfe2e04-76a2-4d4c-acf1-017b3df364b4,
  abstract     = {This paper presents a new robust microphone array to enhance speech signal under the influence of noise and jammer(s). The proposed structure comprises of a soft constrained subband beamformer, a blocking system and a non-coherent processing technique. The soft constrained beamformer enhances the desired speech signal in a specified region by suppressing all side-lobes. This enhanced signal is then used as a reference signal by the blocking system to estimate the interference spectrum. Finally, the beamformer's output is spectral subtracted using the estimated interference spectrum. Simulations in a real office environment show higher interference suppression level compared to those obtained using the soft constrained beamformer only. Most importantly. this is achieved with negligible expense on target signal distortion.},
  author       = {Low, Siow-Yong and Grbic, Nedelko and Nordholm, Sven},
  booktitle    = {The 8th International Conference on of Communication Systems, 2002. ICCS 2002. },
  isbn         = {0-7803-7510-6},
  language     = {eng},
  pages        = {1020--1024},
  publisher    = {IEEE--Institute of Electrical and Electronics Engineers Inc.},
  title        = {Robust microphone array using subband adaptive beamformer and spectral subtraction},
  url          = {http://dx.doi.org/10.1109/ICCS.2002.1183287 },
  volume       = {2},
  year         = {2002},
}