| 摘要 |
<P>PROBLEM TO BE SOLVED: To generate a monaural acoustic signal in which a soundless state does not occur in the case of making into monaural signal, even if phases of right and left channel signals are inverse. <P>SOLUTION: A signal rearranging part 102 rearranges a right channel acoustic signal S101 and a left channel acoustic signal S102 so as to be alternately exchanged in the case of monaural outputting and writes an acoustic signal S103 into a memory part 103. A right channel/monaural equalizer 104 filters a stored right channel/monaural acoustic signal S104 that is the rearranged acoustic signal S103 recorded in the memory part 103, to remove a frequency component higher than the Nyquist frequency at the interval of one sample. A corrected right channel/monaural acoustic signal S106 is imparted through a signal switching part 105 to a left channel equalizer 106, is equalized and becomes an output left channel acoustic signal S108. <P>COPYRIGHT: (C)2005,JPO&NCIPI |
