本代码实现语音信号的特征提取功能，包含预加重，加窗，DFT变换，设置滤波器组，计算每隔滤波器输出，求取MFCC系数的全过程-The code feature extraction of speech signal features, including pre-emphasis, windowing, DFT transform, set the filter to calculate every filter output, to strike the entire process of MF