中文说明：
利用所给的中心削波,计算自相关/AMDF代码,选取一段语音,使用Praat预估其基音周期范围,合理设置预估的极值点距离等参数,计算并画出语音的基音频率曲线
English Description：
Using the given center clipping, calculate the autocorrelation / AMDF code, select a segment of speech, use Praat to estimate its pitch period range, reasonably set the estimated extreme point distance and other parameters, calculate and draw the pitch frequency curve of speech