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提出一种基于网络编码的速率控制方法,目标是提高网络吞吐量和视频传输的质量.构建监听辅助图用于描述上行链路传输速率对编码机会的影响,在此基础上给出编码决策问题的分析.设计启发式上行链路传输速率控制算法,并将下行链路传输速率控制与网络编码相结合,最小化视频传输的失真率.通过仿真实验方法将本文提出的机制与典型网络编码机制进行了比较,仿真结果表明,速率自适应网络编码机制能够显著提高视频序列的可解码帧率和吞吐量.
A rate control method based on network coding is proposed, which aims to improve network throughput and quality of video transmission.It constructs a monitoring aid map to describe the effect of uplink transmission rate on coding opportunity, and then gives coding decision-making problem The heuristic uplink transmission rate control algorithm is designed and the downlink transmission rate control is combined with the network coding to minimize the distortion rate of video transmission.Through the simulation experiment, the proposed mechanism is compared with the typical network coding mechanism The simulation results show that the rate adaptive network coding mechanism can significantly improve the decodable frame rate and throughput of the video sequence.