| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an acoustic processing apparatus that can suppress grating caused by the reversal of fundamental sound and harmonic wave in a specific listening position, and in which grating sound does not newly occur in a position other than the specific listening position by applying filters. <P>SOLUTION: The acoustic processing apparatus detects fundamental sound frequency f<SB POS="POST">b</SB>(n) and harmonic wave frequency f<SB POS="POST">N</SB>(n) from an input regenerative signal. In addition, the acoustic processing apparatus calculates fundamental sound level L<SB POS="POST">b</SB>(n) and harmonic wave level L<SB POS="POST">N</SB>(n) of the input regenerative signal and a convolution signal of an input audio characteristic. The acoustic processing apparatus generates a correction filter that satisfies L<SB POS="POST">b</SB>(n)>L<SB POS="POST">N</SB>(n) and applies the correction filter to a regenerative signal when the calculated fundamental sound amplitude level L<SB POS="POST">b</SB>(n) is compared with the harmonic wave amplitude level L<SB POS="POST">N</SB>(n) and there is L<SB POS="POST">N</SB>(n) greater than L<SB POS="POST">b</SB>(n). <P>COPYRIGHT: (C)2012,JPO&INPIT |
