NDLI: Maximum likelihood based noise covariance matrix estimation for multi-microphone speech enhancement

Content Provider	IEEE Xplore Digital Library
Author	Kjems, U. Jensen, J.
Copyright Year	2012
Description	Author affiliation: Oticon A/S, Sm⊘rum, Denmark (Kjems, U.; Jensen, J.)
Abstract	Multi-microphone speech enhancement systems can often be decomposed into a concatenation of a beamformer, which provides spatial filtering of the noisy signal, and a singlechannel (SC) noise reduction filter, which reduces the noise remaining in the beamformer output. Here, we propose a maximum likelihood based method for estimating the intermicrophone covariance matrix of the noise impinging on the microphone array. The method allows prediction of this co-variance matrix for non-stationary noise sources even in signal regions where the target speech signal is present. Although the noise covariance matrix may have several purposes, we use it in this paper for estimating the power spectral density (psd) of the noise entering the SC filter, as this is important for optimal operation of the SC filter. In simulation experiments with a binaural hearing aid setup in a realistic acoustical scenario, the proposed method performs better than existing methods for estimating this noise psd.
Starting Page	295
Ending Page	299
File Size	168902
Page Count	5
File Format	PDF
ISBN	9781467310680
ISSN	20761465
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2012-08-27
Publisher Place	Romania
Access Restriction	Subscribed
Rights Holder	EURASIP
Subject Keyword	Noise Covariance Estimation Noise Power Spectral Density Estimation Noise Single-Channel Post Filter Speech Covariance matrix Noise measurement Arrays Indexes Multi-MicrophoneSpeech Enhancement Microphones
Content Type	Text
Resource Type	Article

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2	Indian Institute of Technology Kharagpur	Host Institute of the Project: The host institute of the project is responsible for providing infrastructure support and hosting the project	https://www.iitkgp.ac.in
3	National Digital Library of India Office, Indian Institute of Technology Kharagpur	The administrative and infrastructural headquarters of the project	Dr. B. Sutradhar bsutra@ndl.gov.in
4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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