DEVICE FOR ESTIMATING SOUND-SOURCE DIRECTION AND SOUND SOURCE SEPARATING DEVICE USING THE SAME, AND METHOD FOR ESTIMATING SOUND-SOURCE DIRECTION AND SOUND SOURCE SEPARATING METHOD USING THE SAME

摘要

PROBLEM TO BE SOLVED: To specify a direction of a desired sound source, without being affected by any reverberation of a reflected sound and the like.;SOLUTION: Right-and-left digital sound signals r(n) and l(n) are input to a section 26 for estimating the sound-source direction. The section 26 applies a process in accordance with a binaural hearing model to these digital sound signals r(n) and l(n), and estimates the direction of the sound source. Concurrently, each input power Pd of the digital sound signals r(n) and l(n) is detected by a power detecting section 24, and a rising transition of the input power Pd is detected by a rising transition detecting section 34. When the rising transition of the input power Pd is detected, a sound-source direction specifying means 30 specifies a direction [ϕe, ψe] estimated by the section 26 at this timing, as a true sound-source direction [ϕs, ψs]. Briefly, the direction of a sound first reaching each of microphones 12 and 14 is specified as the sound-source direction [ϕs, ψs].;COPYRIGHT: (C)2009,JPO&INPIT