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改进的基音检测算法
引用本文:李晋,江成,刘甫.改进的基音检测算法[J].计算机工程与应用,2011,47(3):117-119.
作者姓名:李晋  江成  刘甫
作者单位:1.湖南涉外经济学院 电气与信息工程学院,长沙 410205 2.山东大学 软件学院,济南 250061
摘    要:提出了一种改进的基音检测算法。利用LMS自适应滤波器对带噪语音信号进行语音增强,再求语音信号的自相关函数(ACF)和平均幅度差函数(AMDF),对ACF峰值和AMDF谷值进行分析,提取改进的ACF/AMDF加权平方特征进行基音检测。实验结果表明,改进算法的检测效果明显优于传统方法,在低信噪比环境下,鲁棒性较好,提高了检测精度。

关 键 词:基音检测  LMS算法  自相关函数  平均幅度差函数  
收稿时间:2009-9-3
修稿时间:2009-11-2  

Improved algorithm for pitch detection
LI Jin,JIANG Cheng,LIU Fu.Improved algorithm for pitch detection[J].Computer Engineering and Applications,2011,47(3):117-119.
Authors:LI Jin  JIANG Cheng  LIU Fu
Affiliation:1.College of Electric Information Engineering,Hunan International Economics University,Changsha 410205,China 2.College of Software,Shandong University,Jinan 250061,China
Abstract:An improved algorithm for pitch detection is proposed.In this algorithm,noisy speech is enhanced using Least Mean Square(LMS) adaptive filter,and then the Autocorrelation Function(ACF) and the Average Magnitude Difference Function(AMDF) of speech signal are calculated.Through analyzing the peak of ACF and the trough of AMDF,the improved weighted square feature of ACF/AMDF is extracted to detect the speech pitch.Experimental results indicate that the proposed pitch detection algorithm is superior to traditional methods obviously,and has higher detection precision and better robustness in low SNR environments.
Keywords:pitch detection Least Mean Square(LMS) algorithm Autocorrelation Function(ACF) Average Magnitude Difference Function(AMDF)
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