东北大学学报（自然科学版）

东北大学学报(自然科学版) ›› 2009, Vol. 30 ›› Issue (11): 1566-1569.DOI: -

• 论著 • 上一篇    下一篇

基于缓冲区控制的流媒体速率控制模型的辨识

邹勇;赵海;魏立峰;高巍;   

  1. 东北大学信息科学与工程学院;沈阳化工学院信息工程学院;
  • 收稿日期:2013-06-22 修回日期:2013-06-22 出版日期:2009-11-15 发布日期:2013-06-22
  • 通讯作者: Zou, Y.
  • 作者简介:-
  • 基金资助:
    教育部高等学校科技创新工程重大项目培育基金资助项目(708026)

Buffer-control-based identification of rate control model of streaming media

Zou, Yong (1); Zhao, Hai (1); Wei, Li-Feng (2); Gao, Wei (1)   

  1. (1) School of Information Science and Engineering, Northeastern University, Shenyang 110004, China; (2) School of Information Engineering, Shenyang Institute of Chemical Technology, Shenyang 110142, China
  • Received:2013-06-22 Revised:2013-06-22 Online:2009-11-15 Published:2013-06-22
  • Contact: Zou, Y.
  • About author:-
  • Supported by:
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摘要： 通过调节发送端发送速率的方法对缓冲区长度进行调整是多媒体同步中常用的方法,为了更好地通过控制理论研究多媒体同步问题就必须得到缓冲区长度与发送速率之间的准确模型.为此在NS2网络仿真平台下构建了一个流媒体播放系统,使用系统辨识的方法对速率控制模型进行了辨识,利用最小二乘法对实验数据进行了分析,数据分析结果表明流媒体速率控制模型具有积分时滞特性.实验证明了辨识的模型是准确的.

关键词: 多媒体同步, 流媒体, 速率控制, 系统辨识, 缓冲区

Abstract: It is common to regulate transmission rate from sending terminal to get a proper buffer length in multimedia synchronization. It is necessary to develop an accurate model between buffer length and transmission rate so as to apply the control theory to multimedia synchronization. A streaming media system is thus constructed on the NS2 to identify the rate control model via system identification. Analyzing the experimental data by the least squares estimator, the results showed that the rate control model of streaming media has the characteristic of integral time lag and verified that the identifying model is accurate.

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