| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an acoustic signal conversion device which, by automatically selecting three channels on reproduction side which constitute the basic units of 3-dimensional sound reproduction, can convert the original acoustic signal into reproduction acoustic signal differing in the number of channels. <P>SOLUTION: An acoustic signal conversion device 1 comprises reproduction channel determination means 42 for determining a reproduction speaker which includes the direction of the original speaker in a direction region identified by directions of three reproduction speakers; weighting coefficient calculation means 43 for calculating as a weighting coefficient the distribution ratio of the original acoustic signal for each reproduction speaker where the acoustic physical quantity at a received point of the original acoustic signal and the acoustic physical quantity at a received point of a reproduction acoustic signal corresponding to each determined reproduction speaker agree, the calculation being performed based on positions of original speakers and the position of each determined reproduction speaker; and acoustic signal distribution means 50 for distributing the original acoustic signal based on a weighting coefficient, thereby generating reproduction acoustic signals for the number of channels matching the reproduction speakers. <P>COPYRIGHT: (C)2012,JPO&INPIT |
