In this paper a method for estimating the direction-of-arrivals (DOAs) of multiple non-stationary sound sources is proposed on the basis of a frequency-domain minimum variance distortionless response (FD-MVDR) beamformer. First, an FD-MVDR beamformer is applied to multiple sound sources, where the beamformer weights are updated according to the surrounding environments for the reduction of the sidelobe effect of the beamformer. Then, multistage DOA estimation is performed to reduce computational complexity regarding the beam search. Finally, a median filter is applied to improve the DOA estimation accuracy. It is demonstrated that the average DOA estimation error of the proposed method is smaller than those of the methods based on conventional GCC-PHAT, MVDR-PHAT, and FD-MVDR, with lower computational complexity than that of the conventional FD-MVDR-based DOA estimation method.

Authors: Yu, Seung Woo; Jeon, Kwang Myung; Lee, Dong Yun; Kim, Hong Kook
Affiliations: Gwangju Institute of Science and Technology, Gwangju, Korea; City University of New York, New York, NY, USA(See document for exact affiliation information.)
AES Convention: 138 (May 2015) Paper Number: 9299
Publication Date: May 6, 2015 Import into BibTeX
Subject: Sound Localization and Separation
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=17723

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