• 中国计算机学会会刊
  • 中国科技核心期刊
  • 中文核心期刊

J4 ›› 2012, Vol. 34 ›› Issue (2): 35-40.

• 论文 • 上一篇    下一篇

流媒体直播系统的多路并发流自适应传输控制

沈以楼,朱艳琴   

  1. (1.苏州大学计算机科学与技术学院,江苏 苏州 215006;2.江苏省计算机信息处理技术重点实验室,江苏 苏州 215006)
  • 收稿日期:2011-02-25 修回日期:2011-05-23 出版日期:2012-02-25 发布日期:2012-02-25

The Adaptive Transmission and Control of MultipleConcurrent Flow in Live Streaming Media Systems

SHEN Yilou,ZHU Yanqin   

  1.  (1.School of Computer Science and Technology,Soochow University,Suzhou 215006;2.Jiangsu Provincial Key Laboratory of Computer Information Processing Technology,Suzhou 215006,China)
  • Received:2011-02-25 Revised:2011-05-23 Online:2012-02-25 Published:2012-02-25

摘要:

为了解决流媒体直播在Internet中传输带宽不足、用户接入多样性等问题,本文探讨了流媒体在IP网络中一般的传输控制技术,提出了一种基于联播的流媒体实时传输控制策略以适应网络带宽的动态变化。首先通过组播方式以及RTP/RTCP协议实现流媒体的实时传输;之后对自适应传输的算法进行了详细的分析和设计,并采用多线程技术实现了网络状况监测和实时码流切换控制;最后通过研究及实验数据分析对比,证明该方案可提高多路并发流传输效率的有效性,并且可以给客户端用户带来较好的用户体验。

关键词: 流媒体, 组播, 实时传输协议, 实时传输控制协议, 自适应

Abstract:

To solve the bandwidth insufficiency of live streaming media's transmission in the Internet, and the diversity of users' access, the general transmission control technologies of streaming media in the IP networks are probed, and a realtime transmission control strategy of streaming media based on broadcast is proposed. The streaming media’s realtime transmission is realized through the multicast and RTP/RTCP agreement. In order to adapt to the dynamic change of network bandwidth, the monitoring of network conditions and realtime streaming switching control are realized by the multithread technology.

Key words: streaming media;multicast;RTP;RTCP;selfadaption