NDLI: Late reverberant spectral variance estimation using acoustic channel equalization

Content Provider	IEEE Xplore Digital Library
Author	Cauchi, B. Naylor, P.A. Gerkmann, T. Doclo, S. Goetze, S.
Copyright Year	2015
Description	Author affiliation: Dept. of Electr. Eng., Imperial Coll. London, London, UK (Naylor, P.A.) \|\| Project Group Hearing, Speech & Audio Technol, Fraunhofer IDMT, Oldenburg, Germany (Cauchi, B.; Doclo, S.; Goetze, S.) \|\| Dept. of Med. Phys. & Acoust., Univ. of Oldenburg, Oldenburg, Germany (Gerkmann, T.)
Abstract	In many single- and multi-channel speech dereverberation methods an estimate of the late reverberant spectral variance (LRSV) is required. Contrary to LRSV estimators based on room acoustical properties, such as reverberation time, or based on isotropic models of the reverberant sound field, in this paper we propose to use acoustic channel equalization with estimated room impulse responses (RIRs) for LRSV estimation. Unlike the typical application of acoustic channel equalization, where the objective is to estimate the anechoic or the early reverberant speech component, here the late reverberant part of the estimated RIR is set as the target response. The combination of the proposed LRSV estimator with a beamformer and a spectral gain aims at a tradeoff between the performance of acoustic channel equalization and the robustness of methods based on models of the reverberant sound field. The performance, evaluated for different levels of RIR estimation error, is compared to the results obtained using a maximum likelihood estimator (MLE) of the LRSV, based on an isotropic model of the reverberant sound field, and to a state-of-the-art acoustic channel equalization method. Experimental results for different acoustic scenarios show that for medium levels of RIR estimation errors the proposed method outperforms acoustic channel equalization as well as the maximum-likelihood LRSV estimator in terms of instrumental speech quality measures.
Starting Page	2481
Ending Page	2485
File Size	124289
Page Count	5
File Format	PDF
ISBN	9780992862633
ISSN	20761465
DOI	10.1109/EUSIPCO.2015.7362831
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	Maximum likelihood estimation Channel equalization Channel estimation Dereverberation Spectral suppression Speech Reverberation Blocking matrix Microphones
Content Type	Text
Resource Type	Article

Sl.	Authority	Responsibilities	Communication Details
1	Ministry of Education (GoI), Department of Higher Education	Sanctioning Authority	https://www.education.gov.in/ict-initiatives
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
5	Website/Portal (Helpdesk)	Queries regarding NDLI and its services	support@ndl.gov.in
6	Contents and Copyright Issues	Queries related to content curation and copyright issues	content@ndl.gov.in
7	National Digital Library of India Club (NDLI Club)	Queries related to NDLI Club formation, support, user awareness program, seminar/symposium, collaboration, social media, promotion, and outreach	clubsupport@ndl.gov.in
8	Digital Preservation Centre (DPC)	Assistance with digitizing and archiving copyright-free printed books	dpc@ndl.gov.in
9	IDR Setup or Support	Queries related to establishment and support of Institutional Digital Repository (IDR) and IDR workshops	idr@ndl.gov.in

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