Journal of Signal Processing
Online ISSN : 1880-1013
Print ISSN : 1342-6230
ISSN-L : 1342-6230
Template-Based Method for Compensation of Time Difference of Arrival in Passive Sound Source Localization under Reverberant and Noisy Environments
Yuuki TachiokaTomohiro Narita
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2017 Volume 21 Issue 2 Pages 73-79

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Abstract

Source localization techniques are important and effective for various applications. Without reverberation and noise, some conventional source localization techniques have achieved high accuracies. However, reverberation degrades their performance due to reflected sounds because they compare observed time differences of arrival (TDOAs) with theoretical TDOAs, which are derived from anechoic conditions and do not agree with actual ones under reverberant conditions. We propose a template-based method that compensates the discrepancy between theoretical TDOAs and actual TDOAs in order to reduce the influence of reflections. In this study, two types of experiments are performed to validate the effectiveness of the proposed method. The first one is a simple case that investigates the estimation accuracy in detail and the second one investigates a more practical case in a more complicated situation. For both cases, our proposed method can calibrate these errors effectively without increasing the computational time and improve the performance of conventional methods.

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© 2017 Research Institute of Signal Processing, Japan
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