| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To maintain the low frequency range intensities of signals after sound source separation. <P>SOLUTION: An observation signal x1(t) and an observation signal x2(t) resulting from picking-up of a mixture of a sound S1 from a sound source PS1 and a sound S2 from a sound source PS2 by a sound pickup PM1 and a sound pickup PM2 are supplied to a sound processing device. A direction identifying unit 62 identifies the arriving directionθe1 of the sound S1 and the arriving directionθe2 of the sound S2. An orientation processor 64, by executing on the observation signal x1(t) and the observation signal x2(t) dead angle control type beam formation that forms a dead angle of sound picking-up in the arriving directionθei (i=1, 2), generates an orientation component Zi[n, u]. A coefficient value generator 66 generates as a processing coefficient valueαi[n, u] the ratio of the amplitude of the orientation component Zi[n, u] to the amplitude sum of an orientation component Z1[n, u] and an orientation component Z2[n, u]. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
