📄 rtp-rtcp流媒体服务器技术研究.mht
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lang=3DEN-US style=3D'font-size:10.0pt;font-family:SimSun;mso-bidi-font-fam=
ily:
SimSun;mso-font-kerning:0pt'><a
href=3D"http://www.ednchina.com/blog/exvision/260/message.aspx##"><span
style=3D'mso-bidi-font-size:12.0pt'>RTP/RTCP</span><span lang=3DEN-US
style=3D'mso-bidi-font-size:12.0pt'><span lang=3DEN-US>流媒=
307;服务器技术研究</span></span><=
/a><o:p></o:p></span></b></p>
<p class=3DMsoNormal align=3Dcenter style=3D'text-align:center'><span lang=
=3DEN-US><o:p> </o:p></span></p>
<p style=3D'line-height:14.0pt'><span lang=3DEN-US style=3D'font-size:10.0p=
t'>1 </span><span
style=3D'font-size:10.0pt'>引言<span lang=3DEN-US><br>
</span>　　随着互联网的'=
134;速发展<span
lang=3DEN-US>,</span>流媒体技术的ॵ=
2;用越来越广泛<span
lang=3DEN-US>,</span>从网上广播、ஸ=
5;影播放到远程教学以&=
#21450;在线的新闻网站等%=
117;用到了流媒体技术。=
;但现有公开文献所报&#=
36947;的大多是利用现有į=
40;流媒体服务器来搭建=
一个流媒体服务系统=
5292;或者是针对流媒体ਤ=
8;据的编码方式所进行&=
#30340;研究。本文对流媒=
307;服务器技术的研究重=
;点在于如何建立一个&#=
26381;务器，并且在实现ė=
69;媒体传输的两个基本=
协议<span
lang=3DEN-US>RTP/RTCP</span>的基础上构建=
;一个基本的流媒体服&#=
21153;器。<span
lang=3DEN-US><o:p></o:p></span></span></p>
<p style=3D'line-height:14.0pt'><span lang=3DEN-US style=3D'font-size:10.0p=
t'>2 </span><span
style=3D'font-size:10.0pt'>流媒体技术简=
介<span
lang=3DEN-US><o:p></o:p></span></span></p>
<p style=3D'line-height:14.0pt'><span style=3D'font-size:10.0pt'>　&#=
12288;<span
lang=3DEN-US>2.1 “</span>流<span lang=3DEN-US>”</span>=
0340;定义<span
lang=3DEN-US><o:p></o:p></span></span></p>
<p style=3D'line-height:14.0pt'><span style=3D'font-size:10.0pt'>　&#=
12288;现在网上传输视频z=
89;音频主要有下载（<span
lang=3DEN-US>Download</span>）和流式传输=
;（<span
lang=3DEN-US>Streaming</span>）两种方式Ӎ=
0;流式传输是连续传送&=
#35270;<span
lang=3DEN-US>/</span>音频信号，当૬=
9;媒体在客户机播放时&=
#20854;余部分在后台继续=
979;载。流式传输有顺序=
;流式传输<span
lang=3DEN-US>(Progressive<br>
Streaming)</span>和实时流式传输<s=
pan
lang=3DEN-US>(<span class=3DSpellE>Realtime</span><br>
Streaming)</span>两种方式。实时&#=
27969;式传输是实时传送ʌ=
92;特别适合现场事件，=
实时流式传输必须匹=
7197;连接带宽，这意味௬=
8;图像质量会因网络速&=
#24230;降低而变差<span
lang=3DEN-US>,</span>以减少对传输४=
2;宽的需求。<span
lang=3DEN-US>“</span>实时<span lang=3DEN-US>”</span=
>的概念是指在一个应&#=
29992;中数据的交付必须Ç=
82;数据的产生保持精确=
的时间关系。<span
lang=3DEN-US><o:p></o:p></span></span></p>
<p style=3D'line-height:14.0pt'><span lang=3DEN-US style=3D'font-size:10.0p=
t'><br>
</span><span style=3D'font-size:10.0pt'>　　在<span lang=
=3DEN-US>Internet</span>中使用流式传=
6755;技术的连续时基媒߮=
7;就称为流媒体，通常&=
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