利用时频分析的方法分析一段语音信号的时频特征，并进行降采样等处理，可直接运行-When the time-frequency analysis method to analyze the frequency of use of a voice signal characteristics, and down-sampling and other treatment, can be directly run

包含了信号处理的各种算法程序,如传统的傅里叶变换等时域和时频域分析。-Contains a variety of signal processing algorithms