基于音频波形极值的基音检测方法  

Pitch detection method based on waveform extremum

作　　者：石锐[1] 叶亮亮[1] 何庆华[2] 

机构地区：[1]重庆大学计算机学院,重庆400044 [2]第三军医大学大坪医院野战外科研究所,重庆400042

出　　处：《计算机工程与应用》2012年第32期107-112,共6页Computer Engineering and Applications

基　　金：重庆市科技攻关计划项目(No.CSTC2009AC5023)

摘　　要：提出了一种基于波形极值的短时基音检测算法。在对语音数据进行预处理、清浊音判断后,提取语音波形极值,进行波形修正,计算幅度差,采用一定的基音判断准则查找基音。该算法无需对音频数据做分窗处理,且主要运算是对波形极值进行处理,比常用的AMDF有着更小的计算量,且有较高的精度。实验结果表明,利用该方法能够很好地得到基音周期,适宜进行实时处理。A short time pitch detection algorithm based on waveform extremum is proposed. Speech extremum is extracted after denoised and voiced / unvoiced detected, then the waveform extremum is modified. Magnitude differ- ence is calculated, and pitch is detected by a certain pitch criterion. The algorithm, with high accuracy, does not need divided window processing, and main calculation is waveform extremum processing and has a smaller amount of calculation than common AMDF. Experimental results show that this method can get accurate pitch and is suit- able for real-time processing.

关 键 词：波形修正算法(WEM) 基音周期(PITCH) 平均幅度差函数(AMDF) 变长平均幅度差函数(LV-AMDF) 循环平均幅度差函数(CAMDF) 

分 类 号：TN912.3[电子电信—通信与信息系统]