Reliability measure for sound source localization

Abstract

Abstract:In this paper, we propose a method of measuring the reliability of direction-of-arrival (DOA) estimation results. One idea for the reliability measure arises from a waterbed effect in DOA estimation. The reliability measure can be obtained from the difference between the maximum and minimum point of cross-correlation. If the calculated reliability measure has a lower value than a predefined threshold, the estimated DOA is regarded as a wrong result and subsequently discarded. Some experiments show that the proposed method can reject perturbed results of the estimated DOA.

Source Localization for Dual Speech Enhancement Technology

“…The searching method for the DOA estimation is very similar to a spectral estimation such as a periodogram. Therefore the waterbed effect in DOA estimation can be obtained by similar process to spectral estimation (Jeon et al 2007). Let () ω Φ be the power spectral density of a Gaussian white noise process and ˆ( ) ω Φ be the periodogram estimate of () ω Φ .…”

“…The concept of reliability measure was presented in (Jeon et al, 2007) and (Jeon, 2008). Figure 3 shows the cross-correlation value of the GCC-PHAT when the speech source is present at a direction of 0° and when the speech source is absent.…”

“…In this chapter, we will define the reliability measure based on waterbed effect of DOA estimator and then show a method of increasing the accuracy of DOA estimation by using reliability measure (Jeon et al, 2007).…”

Maximum Likelihood Detector of Reliable Direction-of-Arrival Estimate

“…51, No. walking around the table, and the distance from the talker to 6, June 2003. the microphones was about 1.5 m. Figure 4(a) and Fig. 4 Figure 5(a) shows the calculated reliability values for the pp.…”

“…The waterbed given by the maximum value of the log-likelihood function effect in DOA estimation can be reduced by a similar[9] If we have No items of observation data for z,which process[6]. If a dominant source exists, the waterbed effect is in a decision region Z0, then should cause the mainlobe to be prominent.…”