| 网络环境下视频连续播放控制算法 |
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| 引用本文： | 蒋涛,许延,陈清金.网络环境下视频连续播放控制算法[J].计算机应用与软件,2007,24(5):143-146. |
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| 作者姓名： | 蒋涛 许延 陈清金 |
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| 作者单位： | [1]中国科学院研究生院中国网通集团网管中心,北京100176 [2]中国网通集团研究院,北京100176 |
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| 摘 要： | 从信宿端的角度来解决视频媒体的同步连续播放,提出了一种自适应的动态媒体播放算法.分析了马尔可夫调制的泊松到达情况下的排队模型,给出了缓冲区门限的选取原则,最后提出了通过用不连续性和播放失真的方差来衡量同步性能方法,实验结果表明,该算法的同步性能优于Yuang的算法.通过选择合适的参数,可有效地防止缓冲区下溢造成的播放停顿以及缓冲区上溢造成的播放跳跃,从而实现同步平滑播放.
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| 关 键 词： | 媒体内同步 动态播放 网络环境下 视频 连续播放 控制算法 ENVIRONMENT NETWORK CONTINUOUS VIDEO 平滑 上溢 下溢 缓冲区门限 参数 选择 同步性能 结果 实验 能方法 方差 失真 |
| 修稿时间： | 2005-12-08 |
A CONTROL SCHEME FOR VIDEO CONTINUOUS PLAYBACK IN NETWORK ENVIRONMENT |
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| Jiang Tao,Xu Yan,Chen Qingjin.A CONTROL SCHEME FOR VIDEO CONTINUOUS PLAYBACK IN NETWORK ENVIRONMENT[J].Computer Applications and Software,2007,24(5):143-146. |
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| Authors: | Jiang Tao Xu Yan Chen Qingjin |
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| Affiliation: | 1.China Netcom Group NOC, Graduate University of Chinese Academy of Sciences, Beijing 100176, China; 2 . China Netcom Group Labs ,Beijing 100176, China |
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| Abstract: | An improved dynamic playback algorithm is proposed in order to keep multimedia playing smoothly, which deals with the problem from the perspective of an end system. In the algorithm, playback rates of multimedia are variable according to the occupied buffer level with an intention of eliminating buffer underflow or overflow. The playback rates are chosen based on the requirement of the intra-media synchronization. To determine the thresholds of the occupied buffer level,a queuing model is established. Based on the analytic results,suitable thresholds can be determined according to the system parameters. Simulation results show the algorithm wins an advantage over Yuang's. |
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| Keywords: | Intra-media synchronization Dynamic playback |
| 本文献已被 CNKI 维普 万方数据 等数据库收录！ |
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