A Study of the Complexity and Accuracy of Direction of Arrival Estimation Methods Based on GCC-PHAT for a Pair of Close Microphones
This work addresses incremental improvements in audio signal processing for embedded systems, focusing on specific hardware constraints.
The paper tackled the problem of improving Direction of Arrival estimation accuracy for close microphone pairs using GCC-PHAT methods, finding that interpolation-based and SVD-based approaches were evaluated for real-time feasibility on low-cost hardware, with execution times measured to identify the most efficient method.
This paper investigates the accuracy of various Generalized Cross-Correlation with Phase Transform (GCC-PHAT) methods for a close pair of microphones. We investigate interpolation-based methods and also propose another approach based on Singular Value Decomposition (SVD). All investigated methods are implemented in C code, and the execution time is measured to determine which approach is the most appealing for real-time applications on low-cost embedded hardware.