中文说明：应用背景这是语音分析的基础知识。不同的语音信号分析方法有。利用线性predictice编码（LPC）和Mel频率倒谱系数（MFCC）可以提取语音信号的特征。 ；关键技术利用快速傅里叶变换（FFT）得到的信号频谱。对信号的LPC，MFCC的基本分析，故障电流控制器也起着至关重要的作用。这些方法是语音信号特征提取的基础。
English Description：
Application backgroundThese are the basics of speech analysis. Different methods are there to analyse the speech signal. By using Linear Predictice Coding(LPC) and Mel Frequency Cepstral Coefficients (MFCC) one can extract the features of the speech signal. Key TechnologyBy using Fast Fourier Transform(fft) we can get the frequency spectrum of the signal. For basic analysis of the signal LPC, MFCC, LFCC are also play a vital role. These methods are the basics of feature extraction of the speech signal.