| 摘要: |
| Internet视频业务的普及和用户越来越高的服务需求推动了实时流媒体业务的迅速发展,流媒体业务的服务质量(QoS)成为业界研究的热点.由于网络的复杂性,流媒体的实时调度控制算法是解决流媒体QoS的关键.结合FEC编码技术和Kalman数字滤波技术,提出一种基于QoS的改进FEC调度传输控制算法——QFEC.该算法根据接收方的状态合理调度流媒体业务,并结合Kalman滤波器原理完成传输速率控制.通过算法状态分析,以及实验数据和性能分析表明,该调度算法能够维持视频数据良好的连续传输,降低视频流的丢包率,显著改善流媒体业务的QoS. |
| 关键词: 流媒体 QOS 前向纠错(FEC) Kalman滤波器 |
| DOI： |
| 分类号: |
| 基金项目:Supported by the Science Foundation of He’nan University of Technology of China under Grant No.2007BS053-150304 (河南工业大学博士基金) |
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| QFEC: A Real-Time Scheduling Algorithm Based on Stream Media |
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TAN Yu-Bo,XIA Bin,TAO Yang
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| Abstract: |
| With the development of network, the video applications based on Internet are growing rapidly. The real-time video applications become popular. Because of the complexity of the network and real-time stream video on demand, the scheduling algorithm has great influence on the QoS. In this paper, a scheduling algorithm based on real-time stream video, QFEC (QoS based on FEC) algorithm is proposed, associated the FEC and Kalman filter theories. According to the status of the receiver, the sending rate is adapted automatically by Kalman filter. The state of the scheduling algorithm is analyzed. This algorithm can maintain the continuity of the real-time video transmission. The simulation results are given, which indicate the scheduling algorithm can provide good video service. |
| Key words: stream media QoS forward error correction (FEC) Kalman filter |
