A Subband Space Constrained Beamformer Incorporating Voice Activity Detection

Davis, Alan; Low, Siow Yong; Nordholm, Sven; Grbic, Nedelko

doi:10.1109/ICASSP.2005.1415647

Access Status

Fulltext not available

Authors

Davis, Alan

Low, Siow Yong

Nordholm, Sven

Grbic, Nedelko

Date

2005

Type

Conference Paper

Metadata

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Citation

Davis, A. and Low, S.Y. and Nordholm, S. and Grbic, N. 2005. A Subband Space Constrained Beamformer Incorporating Voice Activity Detection, in IEEE International Conference on Acoustic, Speech, and Signal Processing, Mar 18-23 2005, pp. III-65-III-68. Philadelphia, Pennsylvania, USA: IEEE.

Source Title

ICASSP 2005 Philadelphia DVD-ROM

Source Conference

2005 IEEE International Conference on Acoustic, Speech, and Signal Processing

DOI

10.1109/ICASSP.2005.1415647

ISBN

0-7803-9076-8

School

Western Australian Telecommunications Research Institute (Research Institute)

URI

http://hdl.handle.net/20.500.11937/31577

Collection

Curtin Research Publications

Abstract

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.