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 。
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.
出处
《山东生物医学工程》
2003年第1期17-21,共5页
Shandong Journal of Biomedical Engineering
基金
国家自然科学基金 (编号 :30 0 0 0 0 41)资助项目
