| 摘要 |
<P>PROBLEM TO BE SOLVED: To generate multiple acoustic signals in which an arriving sound in each direction is emphasized using a non-directional sound collection device. <P>SOLUTION: A sum component generation part 34 generates a sum component M by addition of spectra of an acoustic signal x1 and an acoustic signal x2 from respective sound collection devices MIC with a reference line DC therebetween, and a difference component generation part 36 generates a difference component S by subtraction of both spectra. A first composition part 382 generates a right component R by addition of the sum component M and the difference component S, and a second composition part 384 generates a left component L by substraction of the sum component M and the difference component S. A coefficient string generation part 52 L generates a processing coefficient row GL in which an arriving sound from the left side of the reference line DC is emphasized by substraction of the sum component M and the right component R, and a coefficient string generation part 52R generates a processing coefficient row GR in which an arriving sound from the right side of the reference line DC is emphasized by substraction of the sum component M and the left component L. A coefficient string generation part 52C generates a processing coefficient row GC in which an arriving sound from the reference line DC direction is emphasized by subtraction of the sum component M and the difference component S. <P>COPYRIGHT: (C)2012,JPO&INPIT |
