| 基于缓冲区控制的流媒体速率控制模型的辨识 |
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| 引用本文： | 邹勇,赵海,魏立峰,高巍.基于缓冲区控制的流媒体速率控制模型的辨识[J].东北大学学报(自然科学版),2009,30(11):1566-1569. |
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| 作者姓名： | 邹勇 赵海 魏立峰 高巍 |
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| 作者单位： | 1. 东北大学,信息科学与工程学院,辽宁,沈阳,110004
2. 沈阳化工学院,信息工程学院,辽宁,沈阳,110142 |
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| 基金项目： | 教育部高等学校科技创新工程重大项目培育基金 |
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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.
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| 关 键 词： | 多媒体同步 流媒体 速率控制 系统辨识 缓冲区 |
Buffer-Control-Based Identification of Rate Control Model of Streaming Media |
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| ZOU Yong,ZHAO Hai,WEI Li-feng,GAO Wei.Buffer-Control-Based Identification of Rate Control Model of Streaming Media[J].Journal of Northeastern University(Natural Science),2009,30(11):1566-1569. |
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| Authors: | ZOU Yong ZHAO Hai WEI Li-feng GAO Wei |
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| Institution: | (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 |
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| 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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| Keywords: | multimedia synchronization streaming media rate control system identification buffer |
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