NDLI: A directional noise suppressor with an adjustable constant beamwidth for multichannel signal enhancement

Content Provider	IEEE Xplore Digital Library
Author	Sugiyama, A. Miyahara, R.
Copyright Year	2015
Description	Author affiliation: Inf. & Media Process. Labs., NEC Corp., Kawasaki, Japan (Sugiyama, A.) \|\| Embedded Syst. Div., NEC Eng., Kawasaki, Japan (Miyahara, R.)
Abstract	This paper proposes a directional noise suppressor with an adjustable constant beamwidth for multichannel signal enhancement. A directional gain based on inter-channel phase difference is combined with a spectral gain commonly used in noise suppressors (NS). The beamwidth can be specified as passband edges of the directional gain. In order to implement frequency-independent constant beamwidth, frequency-proportionate band-edge phase differences are determined for the passband. Stereo perception is preserved by weighting stereo input with the common directional and spectral gain. Evaluation with signals recorded by a commercial PC demonstrates that the signal-to-noise ratio improvement and the PESQ score for the enhanced signal are equally improved in two channels by 26.1 dB and 0.2 over a conventional NS. ILD difference between the input and the output is small when the target-signal dominates the input signal.
Starting Page	1276
Ending Page	1280
File Size	481849
Page Count	5
File Format	PDF
ISBN	9780992862633
ISSN	20761465
DOI	10.1109/EUSIPCO.2015.7362589
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2015-08-31
Publisher Place	France
Access Restriction	Subscribed
Rights Holder	EURASIP
Subject Keyword	Error analysis Discrete Fourier transforms Beamformer Phase difference Microphones Multichannel Nose Speech Noise suppressor Constant beamwidth Directional gain Passband Gain
Content Type	Text
Resource Type	Article

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