The effect of a voice activity detector on the speech enhancement performance of the binaural multichannel wiener filter

Authors:
Jasmina Catic;Torsten Dau;Jörg M. Buchholz;Fredrik Gran
Affiliations:
Department of Electrical Engineering, Technical University of Denmark, Lyngby, Denmark;Department of Electrical Engineering, Technical University of Denmark, Lyngby, Denmark;Department of Electrical Engineering, Technical University of Denmark, Lyngby, Denmark;GN ReSound A/S, Lautrupbjerg 7, Ballerup, Denmark
Venue:
EURASIP Journal on Audio, Speech, and Music Processing
Year:
2010

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Abstract

A multimicrophone speech enhancement algorithm for binaural hearing aids that preserves interaural time delays was proposed recently. The algorithm is based on multichannel Wiener filtering and relies on a voice activity detector (VAD) for estimation of second-order statistics. Here, the effect of a VAD on the speech enhancement of this algorithm was evaluated using an envelopebased VAD, and the performance was compared to that achieved using an ideal error-free VAD. The performance was considered for stationary directional noise and nonstationary diffuse noise interferers at input SNRs from -10 to +5 dB. Intelligibility-weighted SNR improvements of about 20 dB and 6 dB were found for the directional and diffuse noise, respectively. No large degradations (