| MPEG-4实时视频传输的拥塞控制算法的改进 |
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| 引用本文： | 刘国柱,王洪林.MPEG-4实时视频传输的拥塞控制算法的改进[J].微型机与应用,2010,29(5). |
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| 作者姓名： | 刘国柱 王洪林 |
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| 作者单位： | 青岛科技大学信息科学与技术学院,山东,青岛,266061 |
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| 基金项目： | 山东省高等学校科技计划项目 |
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| 摘 要： | 提高视频图像的传输质量是网络拥塞控制方面的重要研究课题,在阐述了码率控制技术和实时视频传输的构架后,分析了基于丢包率和双丢包率阈值门限的拥塞控制机制以及VM8码率控制算法,指出了VM8码率控制算法的不足,所在并进行了相应的改进.根据当前丢包率,对未来的发送速率的变化做出预测,从而动态地决定缓冲区目标水位参数,使得改进后的算法对发送速率具有一定的预测性.实验证明,改进后的算法有效地提高了编码后的图像质量.
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| 关 键 词： | MEPG-4标准 VM8算法 码率控制 编码器缓冲区 |
Improvement of congestion control algorithm about MPEG-4 real time video transfer |
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| LIU Guo Zhu,WANG Hong Lin.Improvement of congestion control algorithm about MPEG-4 real time video transfer[J].Microcomputer & its Applications,2010,29(5). |
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| Authors: | LIU Guo Zhu WANG Hong Lin |
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| Affiliation: | LIU Guo Zhu,WANG Hong Lin (Information College of Science , Technology,Qingdao University of Science , Technology,Qingdao 266061,China) |
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| Abstract: | The research about improvement of video transfer is an important topic in netwok congestion control. Firstly, the code ratio control technology and frame of real time video transfer are introduced. Secondly, congestion control mechanism about packets losing ratio and two thresholds of packets losing ratio is researched. Thirdly, the VM8 code ratio control algorithm is introduced. Subsequently, the lack of VM8 code ratio control algorithm is proposed, and the improvements about the algorithm are made. The im... |
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| Keywords: | MEPG-4 standard VM8 algorithm rate control encoder buffer |
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