关键词: 谐波正弦语音模型, 小波变换, 多分辨率, 谐波语音信号

Abstract: Harmonic sinusoidal speech model has the problem of fixed frame length，which can not get the best resolution of each harmonic，and the resolution determines the effect of speech modeling.A harmonic sinusoidal speech model based on wavelet multi-resolution analysis is proposed，decomposing an input harmonic speech signal into multi-resolution sub-band signals using the wavelet transform，and harmonic sinusoidal speech model is applied to each sub-band signal respectively.Finally，each sub-band signal modeled is synthesized.Simulation experiments show that the objective signal reconstruction error of the proposed model is reduced by about two orders of magnitude，and MOS’s grades have increased about 0.3 through PESQ software’s testing.

Key words: harmonic sinusoidal speech model, wavelet transform, multi-resolution, harmonic speech signal