I. Introduction
In the rapid development of the Internet today, people have a lot of requirements about the network information. In addition to get pictures and text of information, people most of the time need audio and video media information. Because the audio and video containing a large amount of data, the traditional HTTP download mode requires longer time. Some of the media applications such as network video conference, live television hope that waiting delay time is as short as possible and with good fluency of transmission. In order to improve the audio-visual effects of the network, streaming media technology emerges as the times require [1].