| 摘要 |
PROBLEM TO BE SOLVED: To adjust (suppress or emphasize) a reverberation component of a sound signal by simple processing.SOLUTION: An index value calculation unit 42A calculates a first index value Q1(k,m) following the temporal change of a sound signal x(t) and a second index value Q2(k,m) following the temporal change of the sound signal x(t) with lower followability than that for the first index value Q1(k,m). An adjustment value calculation unit 44 calculates an adjustment value Gs(k,m) for suppressing a reverberation component of the sound signal x(t), in accordance with a ratio R(k,m) of the first index value Q1(k,m) and the second index value Q2(k,m). A reverberation adjustment unit 36 multiplies a spectrum X(k,m) of the sound signal x(t) by the adjustment value Gs(k,m). |
