Title :
A Real-Time Demonstrator for the 2D Localization of two Sound Sources Using Blind Adaptive MIMO System Identification
Author :
Lombard, Anthony ; Kellermann, Walter ; Buchner, Herbert
Author_Institution :
Multimedia Commun. & Signal Process., Univ. of Erlangen-Nuremberg, Erlangen
Abstract :
A real-time demonstrator for the 2D localization of two sound sources using two microphone pairs is presented and evaluated. The scheme relies on Blind Source Separation (BSS) to adaptively identify the acoustical MIMO system, hence allowing the estimation of relative time delays for each source and each dimension. Extending our previously presented work [1], a mechanism to solve a pairing problem occuring in the multidimensional localization of several sources is described. It exploits the inherent signal extraction abilities of BSS. Experimental evaluations with large microphone apertures show that the demonstrator can accurately localize two speech sources in a 2D space, with a precision better than one degree.
Keywords :
MIMO systems; acoustic signal processing; adaptive signal processing; blind source separation; microphones; 2D localization; acoustical MIMO system; blind adaptive MIMO system identification; blind source separation; inherent signal extraction; microphone pairs; real-time demonstrator; Adaptive systems; Blind source separation; Delay effects; Delay estimation; MIMO; Microphones; Multidimensional systems; Real time systems; Source separation; System identification; Acoustic source localization; TDOA estimation; blind source separation; real-time demonstrator;
Conference_Titel :
Hands-Free Speech Communication and Microphone Arrays, 2008. HSCMA 2008
Conference_Location :
Trento
Print_ISBN :
978-1-4244-2337-8
Electronic_ISBN :
978-1-4244-2338-5
DOI :
10.1109/HSCMA.2008.4538683
