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SMP-PHAT: Lightweight DoA Estimation by Merging Microphone Pairs (2203.14409v1)
Published 27 Mar 2022 in cs.SD and eess.AS
Abstract: This paper introduces SMP-PHAT, which performs direction of arrival (DoA) of sound estimation with a microphone array by merging pairs of microphones that are parallel in space. This approach reduces the number of pairwise cross-correlation computations, and brings down the number of flops and memory lookups when searching for DoA. Experiments on low-cost hardware with commonly used microphone arrays show that the proposed method provides the same accuracy as the former SRP-PHAT approach, while reducing the computational load by 39% in some cases.