NDLI: An iterative approach to source counting and localization using two distant microphones

Content Provider	ACM Digital Library
Author	Wang, Lin Cavallaro, Andrea Reiss, Joshua D. Hon, Tsz-Kin
Copyright Year	2016
Abstract	We propose a time difference of arrival (TDOA) estimation framework based on time-frequency inter-channel phase difference (IPD) to count and localize multiple acoustic sources in a reverberant environment using two distant microphones. The time-frequency (T-F) processing enables exploitation of the non-stationarity and sparsity of audio signals, increasing robustness to multiple sources and ambient noise. For inter-channel phase difference estimation, we use a cost function, which is equivalent to the generalized cross correlation with phase transform (GCC) algorithm and which is robust to spatial aliasing caused by large inter-microphone distances. To estimate the number of sources, we further propose an iterative contribution removal (ICR) algorithm to count and locate the sources using the peaks of the GCC function. In each iteration, we first use IPD to calculate the GCC function, whose highest peak is detected as the location of a sound source; then we detect the T-F bins that are associated with this source and remove them from the IPD set. The proposed ICR algorithm successfully solves the GCC peak ambiguities between multiple sources and multiple reverberant paths.
Starting Page	1079
Ending Page	1093
Page Count	15
File Format	PDF
ISSN	23299290
e-ISSN	23299304
Volume Number	24
Issue Number	6
Journal	IEEE/ACM Transactions on Audio, Speech and Language Processing (TASLP)
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2016-06-01
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Gcc-phat Ipd Microphone array Source counting Tdoa estimation
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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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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