| 摘要 |
Input waveform data are processed by Fast Fourier Transform or otherwise to separate a harmonic wave component from the waveform data while a non-harmonic wave component is separated by subtracting the harmonic wave component from the waveform data. Vector quantization is performed on the harmonic wave component by selecting and using one of prestored harmonic vectors as a representative vector for the harmonic wave component, and vector quantization is performed on the non-harmonic wave component, independently of the harmonic wave component, by selecting and using one of prestored non-harmonic vectors as a representative vector for the non-harmonic wave component. Then, using harmonic and non-harmonic vectors indicated by vector information of a waveform to be reproduced, waveforms of harmonic and non-harmonic wave components are generated separately and then combined to thereby reproduce/generate the waveform. The non-harmonic wave component is divided, on the basis of detected periodicity of the corresponding harmonic wave component, into a plurality of sections each having a length corresponding to an integral or fractional multiple of the period of the harmonic wave component.
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