一种基于三阶统计量的基音周期检测新方法

A New Method of pitch Period Detection Based on Wavelet Transform and Third-order Statistics

本文利用小波变换和三阶统计量的基本特性，提出了一种小波变换与三阶统计量结合的基音周期检测新方法；在低信噪比的基音周期检测中，本方法可以获得比其它基音周期检测法更精确的结果；文中还分析了压扩因子和门限因子Ｋ的选择，实验表明，Ｋ在一定范围内取值时对基音周期检测结果影响不大。

In the light of the properties of wavelet transform and higher-order statistics, a new pitch detection method with the combination of wavelet transform and third-order statistics is proposed. For the low signal-to noise ratio (SNR), the performance of the method is better than other methods which had been presented. The selections of the scaling factor and the threshold factor K are discussed. The simulation results show that the threshold factor K has less effect on the result of pitch detection.