该段程序是求取一段语音的起始和终止点坐标，以达到端点检测的目的。-This section of the program is to strike a starting and ending point coordinates a voice in order to achieve the purpose of endpoint detection.

语谱图的横坐标是时间，纵坐标是频率，坐标点值为语音数据能量。由于是采用二维平面表达三维信息，所以能量值的大小是通过颜色来表示的，颜色深，表示该点的语音能量越强。(The spectral abscissa graph is time, the vertical axis is the frequency of speech data for energy point coordinates. Since the two-dimensional information is expressed i