A subband based acoustic source localization system for reverberant environments

Abstract:
In this paper an efficient acoustic source localization system is described which works within a subband processing framework and is robust against reverberation. The proposed system is related to the adaptive eigenvalue decomposition algorithm proposed by Benesty et al. and uses adaptive subband filters to model the room impulse responses. The subband filters are analyzed in order to estimate the relative time delay between the direct sound paths. The subband processing permits for special extensions in the filter adaptation rule which allow for an efficient extraction of the time delay information and tracking of moving sources. The proposed system has been evaluated in real acoustic environments with different reverberation times, and is compared to the generalized cross correlation method.