Patent ID: 9648435
Date: 2017-05-09
CPC Classifications: G10L,H04R,H04S

Claim:
1. A sound-source separation method of forming a directivity in a specific direction relative to a pair of sampled input signals, the method comprising: a filtering step of performing filtering containing a delay by a specific time on one of the pair of sampled input signals; an interchanging step of, after the filtering step, alternately interchanging the pair of sampled input signals through an interchanging circuit for each sampling, and generating a pair of interchanged signals; a generating step of multiplying one of the interchanged signals by a coefficient m, and generating an error signal between the interchanged signals; an updating step of calculating a recurrence formula of the coefficient m containing the error signal, and updating the coefficient m for each sampling; and an outputting step of multiplying the pair of sampled input signals by the sequentially updated coefficient m and outputting resultant signals, wherein: the specific time in the filtering step is equivalent to a time difference of sound wave that reaches a pair of microphones from the specific direction; and in the filtering step, the pair of sampled input signals originating from the sound wave from the specific direction is adjusted so as to have a same amplitude and a same phase.