说明：  信号的端点检测,语音端点检测就是指从包含语音的一段信号中确定出语音的起始点和结束点。 正确的端点检测对于语音识别和语音编码系统都有重要的意义。
(Signal endpoint detection, voice activity detection means from the voice of a signal containing a voice to determine the starting point and end point. The right endpoint detection for speech recognition and speech coding system has an important significance.)