  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.
