ACOUSTIC SIGNAL ANALYSIS METHOD

申请公布号：

JP2001134269(A)

申请号：

JP19990315099

申请日期：

1999.11.05

申请公布日期：

2001.05.18

申请人：

YAMAHA CORP

发明人：

KAKISHITA MASAHIRO

分类号：

G10L11/00;G10H7/08

主分类号：

G10L11/00

摘要：

PROBLEM TO BE SOLVED: To extract a specific sound component such as a resonance sound component. SOLUTION: 1st musical sound waveform data containing a resonance sound component and 2nd musical sound waveform data not containing the component are Fourier-transformed for a short time, respectively, and both data are separated into deterministic waveforms and residual waveforms, respectively. A subtraction is performed between the deterministic components by properly arranging the waveform containing the resonance sound component in phase with the waveform not containing the resonance sound component, and a subtraction is performed between the residual components by dividing both residual component waveforms into frequency bands through a group of band-pass filters and using differences between respective envelopes. A waveform of only resonance sound component is generated by summing up both of the subtraction results.