NDLI: Over-determined source separation and localization using distributed microphones

Content Provider	ACM Digital Library
Author	Wang, Lin Cavallaro, Andrea Reiss, Joshua D.
Copyright Year	2016
Abstract	We propose an overdetermined source separation and localization method for a set of $\textit{M}$ microphones distributed around an unknown number, $\textit{N}$ < $\textit{M},$ of sources. We reformulate the overdetermined acoustic mixing procedure with a new determined mixing model and apply a determined $\textit{M}$ × $\textit{M}$ independent component analysis (ICA) in each frequency bin directly. The reformulated ICA operates without knowing $\textit{N}$ and also leads to better separation in reverberant scenarios. To solve the challenging permutation ambiguity problem, we first employ a time activity-based clustering approach to cluster the separated frequency components into $\textit{M}$ channels. We then propose a remixing procedure to detect and merge channels from the same source. The detection is done by analyzing time and frequency activities, spectral likeliness, and spatial location. To estimate the spatial location, we propose a time--frequency masking-based steered response power algorithm. Simulated and real-data experiments in a very challenging reverberant scenario confirm the effectiveness of the proposed method in obtaining the number of sources, the separated signals, and the location and spatial likelihood of each source.
Starting Page	1569
Ending Page	1584
Page Count	16
File Format	PDF
ISSN	23299290
e-ISSN	23299304
Volume Number	24
Issue Number	9
Journal	IEEE/ACM Transactions on Audio, Speech and Language Processing (TASLP)
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2016-09-01
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Blind source separation Over-determined mixture Permutation alignment Source localization
Content Type	Text
Resource Type	Article
Subject	Instrumentation Computational Mathematics Signal Processing Electrical and Electronic Engineering Acoustics and Ultrasonics Speech and Hearing Media Technology

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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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