Estimation of Sound Source Number and Directions under a Multisource Reverberant Environment. (22nd June 2010)

• Record Type: Journal Article
• Authors: Hu Hu, Jwu-Sheng Jwu-Sheng; Yang Yang, Chia-Hsin Chia-Hsin
• Other Names: Nordholm Nordholm Sven Sven Academic Editor.
• Is Part Of: EURASIP journal on advances in signal processing. Volume 2010(2010)
• Publication Date: 2010-06-22
• Subjects: Signal processing -- Periodicals; Traitement du signal; Signal processing; Periodicals; 621.3822
• DOI: 10.1155/2010/870756
• Languages: English
• ISSNs: 1687-6172

Abstract

Abstract : Sound source localization is an important feature in robot audition. This work proposes a sound source number and directions estimation method under a multisource reverberant environment. An eigenstructure-based generalized cross-correlation method is proposed to estimate time delay among microphones. A source is considered as a candidate if the corresponding time delay combination among microphones gives reasonable sound speed estimation. Under reverberation, some candidates might be spurious but their direction estimations are not consistent for consecutive data frames. Therefore, an adaptive K-means++ algorithm is proposed to cluster the accumulated results from the sound speed selection mechanism. Experimental results demonstrate the performance of the proposed algorithm in a real room.