残差域加权ACF基音周期检测算法  

Weighted ACF Pitch Detection Algorithm Based on Linear Prediction Residual

作　　者：肖强[1] 王亚[1] 陈亮[2] 

机构地区：[1]解放军理工大学通信工程学院研究生4队,江苏南京210007 [2]解放军理工大学通信工程学院电子信息工程系,江苏南京210007

出　　处：《军事通信技术》2011年第1期33-36,59,共5页Journal of Military Communications Technology

基　　金：国家自然科学基金资助项目(61072042)

摘　　要：针对传统自相关(ACF)基音周期检测算法存在较多的倍频和半频错误,文章提出一种基于线性预测残差域加权ACF基音周期检测方法。首先对语音信号中心削波,减小共振峰的影响;而后进行线性预测分析获得残差信号,对其求自相关值和循环幅度差(CAMDF)值,以CAMDF的倒数值为权重加权ACF进行基音周期检测;最后通过基音平滑算法对提取的基音轨迹进行后处理。仿真实验表明,该算法可降低基音提取的倍频和半频错误,提高估计精度。A modified version of the ACF pitch .detection algorithm is proposed in this paper. Firstly, linear predictive coding analysi：s is performed on the clipped speech signal. Then the segmented speech is filtered by the inverse filter to get the linear prediction error, the ACF and CAMDF value of the error signal are calculated. Finally, as the CAMDF has similar characteristics with the ACF, the ACF is weighled by the reciprocal of the CAMDF. Simulation results show that the proposed algorithm leads to higher accuracy of the estimated pitch than traditional ACF method.

关 键 词：基音周期检测 自相关函数 线性预测误差 语音信号处理 

分 类 号：TN912.3[电子电信—通信与信息系统]