基于MATLAB的自相关法基音提取的m文件。利用浊音和清音的自相关函数的不同，可以提取基音周期。 其中采用的三电平削波法，可修正中心削波。-Based on MATLAB autocorrelation pitch extracted files m. Using different voiced and unvoiced autocorrelation function can be extracted pitch. Three-level clipping method employed therein, may be amended center clipping.