Single-microphone wind noise reduction by adaptive postfiltering

This paper presents a novel time-domain algorithm for detecting and attenuating the acoustic effect of wind noise in speech signals originating from mobile terminals. The detection part makes use of metrics that exploits the properties of the spectral envelop of wind noise as well as its non-periodi...

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Bibliographic Details
Published in2009 IEEE Workshop on Applications of Signal Processing to Audio and Acoustics pp. 177 - 180
Main Authors Nemer, E., Leblanc, W.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.10.2009
Subjects
Acoustic noise
Acoustic signal detection
Attenuation
Linear predictive coding
Noise reduction
Resonance
Speech analysis
Speech enhancement
Time domain analysis
Wind energy
wind noise reduction
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Summary:This paper presents a novel time-domain algorithm for detecting and attenuating the acoustic effect of wind noise in speech signals originating from mobile terminals. The detection part makes use of metrics that exploits the properties of the spectral envelop of wind noise as well as its non-periodic and non-harmonic nature. LPC analyses of various orders are carried out and the results used to distinguish between wind and speech frames and to estimate the magnitude and location of the wind noise `resonance'. The suppression part entails constructing a parameterized postfilter of an appropriate order having a `null' where the wind noise `resonance' is. Wind-only frames are used to estimate the wind noise energy, from which the emphasis parameters of the post-filter are adjusted to provide an appropriate attenuation. The proposed scheme may be combined with background-noise suppression algorithms, or with speech-formant-enhancing post-filters in the context of a speech codec.
ISBN:1424436788
9781424436781
ISSN:1931-1168
1947-1629
DOI:10.1109/ASPAA.2009.5346518