一种基音周期估计的改进CAMDF算法  

Speech pitch determination based on the improved circular AMDF

作　　者：杨莎[1] 夏秀渝[1] 张余生[1] 唐邦友[1] 

机构地区：[1]四川大学电子信息学院,成都610064

出　　处：《四川大学学报（自然科学版）》2008年第4期773-778,共6页Journal of Sichuan University(Natural Science Edition)

摘　　要：本文首先介绍了传统基音周期估计算法:ACF算法和AMDF算法.为了克服AMDF算法容易导致估计出的基音周期加倍的缺陷,本文重点阐述了CAMDF基音周期估计算法,并提出了改进CAMDF算法.该法是在CAMDF算法之前,对语音信号进行降比特处理.实验表明,改进CAMDF算法在降低对处理器件复杂度和精度方面要求的同时并不会影响基音周期的估计效果.最后,本文进行了各种基音检测算法的仿真比较,实验表明改进CAMDF算法在基音估计效果上具有很好的准确性和稳定性.The authors introduce the traditional methods for speech pitch determination, including ACF algorithm and AMDF algorithm. For AMDF algorithm is easy to make the estimated pitch double, and increase the error, we improve the CAMDF algorithm to solve the problem. At the end of this paper, the authors compare these kinds of methods for pitch determination. The experimentations indicate that the improved CAMDF algorithm has better performance than the others. The improved CAMDF algorithm can reduee the calculation without affecting effectiveness for speech pitch determination.

关 键 词：ACF AMDF W-AMDF M-AMDF CAMDF 基音检测 

分 类 号：TP207.7[自动化与计算机技术—检测技术与自动化装置]