A Volumetric SRP with Refinement Step for Sound Source Localization

This letter proposes an efficient method based on the steered-response power (SRP) technique for sound source localization using microphone arrays: the refined volumetric SRP (RV-SRP). By deploying a sparser volumetric grid, the RV-SRP achieves a significant reduction of the computational complexity...

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Bibliographic Details
Published inIEEE signal processing letters Vol. 22; no. 8; pp. 1098 - 1102
Main Authors Lima, Markus V. S., Martins, Wallace A., Nunes, Leonardo O., Biscainho, Luiz W. P., Ferreira, Tadeu N., Costa, Mauricio V. M., Bowon Lee
Format Journal Article
LanguageEnglish
Published IEEE 01.08.2015
Subjects
Accuracy
Acoustics
Computational complexity
Linear programming
microphone array
Microphones
Microwave integrated circuits
sound source localization
steered-response power
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Summary:This letter proposes an efficient method based on the steered-response power (SRP) technique for sound source localization using microphone arrays: the refined volumetric SRP (RV-SRP). By deploying a sparser volumetric grid, the RV-SRP achieves a significant reduction of the computational complexity without sacrificing the accuracy of location estimates. In addition, a refinement step improves on the compromise between complexity and accuracy. Experiments conducted in both simulated- and real-data scenarios show that the RV-SRP outperforms state-of-the-art methods in accuracy with lower computational cost.
ISSN:1070-9908
1558-2361
DOI:10.1109/LSP.2014.2385864