【摘要】 利用小波变换模极大值点同信号突变点之间的关系 ,以及声门闭合时刻 (GCI)引起语音信号锐变的特点 ,通过检测两个相邻GCI的距离来估计语音的基音周期 ,由此求出基音频率对时间的变化曲线 (即声调曲线 )。通过仿真 ,该方法提取声调准确 ,而且抗噪音的能力比较强更多还原

【Abstract】 Based on the relationship between the modulus maxima of wavelet transform and signal singularity,this paper proposed a time-based singularity detection method for finding the pitch period of a speech signal.Pitch period can be extracted by estimating the interval between two adjacent GCIs.Then we could draw the fundamental frequency contour.This method is both accurate and robust to noise through simulations.更多还原