语音信号的分析及前期的预处理，包括语音信号的一些特征；预处理包括前期的预滤波、小波降噪、预加重、加窗分帧、语音端点检测。-Speech signal analysis and pre processing, including some of the features of the speech signal preprocessing including pre filtering, wavelet noise reduction, pre emphasis, plus window framing, voice endpoint detection.