Fast Cross-Correlation for TDoA Estimation on Small Aperture Microphone Arrays
Signal Processing
2023-03-13 v3 Sound
Audio and Speech Processing
Abstract
This paper introduces the Fast Cross-Correlation (FCC) method for Time Difference of Arrival (TDoA) Estimation for pairs of microphones on a small aperture microphone array. FCC relies on low-rank decomposition and exploits symmetry in even and odd bases to speed up computation while preserving TDoA accuracy. FCC reduces the number of flops by a factor of 4.5 and the execution speed by factors between 3.5 and 8.3 on embedded hardware, compared to the state-of-the-art Generalized Cross-Correlation (GCC) method that relies on the Fast Fourier Transform (FFT). This improvement can provide portable microphone arrays with extended battery life and allow real-time processing on low-cost hardware.
Keywords
Cite
@article{arxiv.2204.13622,
title = {Fast Cross-Correlation for TDoA Estimation on Small Aperture Microphone Arrays},
author = {François Grondin and Marc-Antoine Maheux and Jean-Samuel Lauzon and Jonathan Vincent and François Michaud},
journal= {arXiv preprint arXiv:2204.13622},
year = {2023}
}
Comments
Submitted to IEEE ICASSP 2023