RFC 3550 RTP July 2003
翻译说明 ..........................................................................................................................................2
RTP： 应用于实时应用的传输协议...............................................................................................I
1. 介绍 .....................................................................................................................................1
1.1 术语 ...........................................................................................................................2
2. RTP Use Scenarios................................................................................................................3
2.1 简单的多播音频会议................................................................................................3
2.2 音频和视频会议........................................................................................................3
2.3 Mixer 和 Translator.....................................................................................................4
2.4 层编码 .......................................................................................................................4
3. 定义 .....................................................................................................................................6
4． 字节序，校正(Alignment)，时间格式...........................................................................9
5. RTP 数据传输协议 ............................................................................................................10
5.1 RTP 定长的头字段 ..................................................................................................10
5.2 RTP 会话的多路复用...............................................................................................12
5.3 RTP 头的 Profile-Specific 修正 ...............................................................................13
6. RTP 控制协议--RTCP........................................................................................................15
6.1 RTCP 报文格式........................................................................................................16
6.2 RTCP 传输间隔........................................................................................................18
6.3 RTCP 报文发送和接收规则....................................................................................21
6.4 发送者和接收者报告..............................................................................................26
6.5 SDES： 源描述 RTCP 报文 ...................................................................................34
6.6 BYE： Goodbye RTCP Packet................................................................................39
6.7 APP： 应用定义的 RTCP 报文..............................................................................40
7. RTP Translators and Mixers................................................................................................41
7.1 概括性描述..............................................................................................................42
7.2 在 Translator 中处理的 RTCP.................................................................................43
7.3 在 Mixer 中的 RTCP 处理 ......................................................................................44
7.4 级联的 Mixer...........................................................................................................45
8. SSRC Identifier 分配和使用...........................................................................................47
8.1 冲突的概率..............................................................................................................47
8.2 冲突解决和回环(loop) 检测....................................................................................48
8.3 Use with Layered Encodings ....................................................................................51
9. 安全 ...................................................................................................................................52
9.1 机密性 .....................................................................................................................52
9.2 鉴定和信息的完整性..............................................................................................53
10. 拥塞控制 .........................................................................................................................54
11. RTP over 网络和传输协议...............................................................................................54
12. 协议常量摘要 .................................................................................................................55
12.1 RTCP 报文类型......................................................................................................55
12.2 SDES 类型..............................................................................................................56
13. RTP Profile 和 Payload 格式说明.................................................................................56
14. 安全考虑 .........................................................................................................................58
15. IANA 考虑 ....................................................................................................................58
16. 知识产权声明 .................................................................................................................59
17. 致谢 ...............................................................................................................................59
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