| 摘要 |
<P>PROBLEM TO BE SOLVED: To change the reverberant time while suppressing excessive deterioration of amplitude at the rear part of the reverberant sound. <P>SOLUTION: The present invention comprises: a waveform dividing part 32 that divides a n impulse response H stored in a storage device 14 into a plurality of blocks Ba on a time axis; a windowing part 34 that multiplies each block Ba with a window function wA to generate a block Bb; a time adjusting part 36 that reduces a time difference between successive ones of the blocks Bb according to a rate R (R<1) indicated by an input apparatus 16;an amplitude adjusting part 42 that adjusts the amplitude of each block Bb so that the amplitudes are decreased as the time difference between the blocks Bb is reduced after the time adjustment by the time adjusting part 36 to generate a block Bc; and a waveform synthesizing part 44 that generates a new impulse response HNEW by adding the blocks Bc processed by the amplitude adjusting part 42. <P>COPYRIGHT: (C)2010,JPO&INPIT |
