Maximum Likelihood Detector of Reliable Direction-of-Arrival Estimate

In this paper, we propose a maximum likelihood detector for reliable sound source localization system. It is based on making a measure of reliability of estimation results. The reliability can be reduced from waterbed effect of source localization algorithm. If the calculated reliability measure has a lower value than a predefined threshold, the estimated direction-of-arrival (DOA) is regarded as a wrong result and subsequently discarded. We determine the threshold for reliable estimate selection using maximum likelihood rule. Some experiments show that the proposed method can reject perturbed results of the estimated DOA.