Patent ID: 8750560
Filing Date: 2014-06-10
Classification: G06F,G06K,G06T

Abstract:
1. A method of computing an estimate of a translation offset between a reference and suspect signal, the method comprising: providing a set of measured phase differences of a suspect signal; for each of plural candidate translation offsets, obtaining a set of expected phase differences of the reference signal at the candidate translation offset, computing a phase deviation metric for each of the set of expected and corresponding measured phase differences at the candidate translation offset, the phase deviation metric comprising a deviation between an expected and corresponding measured phase difference, and computing a sum of the phase deviation metrics at the candidate translation offset, wherein sums of phase deviation metrics are computed for corresponding candidate translation offsets; and determining a candidate translation offset having a sum of phase deviation metrics indicating a best match between expected and corresponding measured phase differences, wherein the candidate translation offset associated with the best match is taken as the estimate of the translation offset.