论文部分内容阅读
提出了一种用于在无线网络中传输视频的结合信源特性及网络拥塞控制的鲁棒性算法.通过场景建模以及特性分析,将分级编码产生的所有码流层划分成不同的类型,并根据它们对网络拥塞控制的贡献以及对重建图像质量的贡献不同,将其分成两个不同的队列.系统根据不同的网络丢包状态(即丢包是由网络拥塞引起还是由无线信道的不可靠传输引起)动态地调整信源速率、不等错误保护强度以及拥塞控制策略.仿真结果表明,该方法与MPEG-4信源编码加固定速率Turbo码方法以及动态调整信源、信道编码速率加选择性丢I,B,P包的网络拥塞控制方法相比,能够提供更好的性能.
This paper proposes a robust algorithm for combining video source characteristics and network congestion control in video transmission in wireless networks.According to scenario modeling and characterization, all the codestreams generated by hierarchical coding are divided into different types, And divide them into two different queues based on their contribution to network congestion control and their contribution to the quality of reconstructed images.The system determines whether the packet loss is caused by network congestion or by the loss of wireless channel Reliable transmission) to dynamically adjust the source rate, unequal error protection strength and congestion control strategy.The simulation results show that this method is compatible with MPEG-4 source coding and fixed rate Turbo coding method, as well as dynamically adjusting the source, channel coding rate Selective loss of I, B, P packet network congestion control methods, can provide better performance.