一种改进的基音周期检测方法  

Improved Algorithm of Pitch Period Detection

作　　者：曾树华[1] 

机构地区：[1]湖南铁路科技职业技术学院,湖南株洲412003

出　　处：《电声技术》2011年第4期53-55,共3页Audio Engineering

摘　　要：提出了一种改进的基于自相关算法的基音周期检测方法,首先对信号进行了预滤波,消除二次谐波的影响。计算自相关系数时使用的是削波后的数据,大大降低了计算复杂度,野波平滑在保持周期的阶跃性的同时去除野波。An improved pitch detection algorithm based on autocorrelation function is proposed in this paper. The signal is pretreated by band-pass filter, and enters clipping to reduce the effects of second harmonic. The data after clipping is used while calculating the autoeorrelation coefficient and the degree of the complex is reduced greatly. The smoothing method maintains the step of pitch and smooth pitch.

关 键 词：基音周期检测 自相关 滤波 削波 平滑 

分 类 号：TN912[电子电信—通信与信息系统]