基于网络编码的SVC高效传输系统

Efficient SVC transmission system based on network coding

为了同时提高网络中视频的传输效率和质量,提出了一种可分级视频编码(SVC)视频鲁棒性传输系统方案,并提出了该系统特性的描述方式.将随机线性网络编码技术和SVC技术相结合,得到了视频系统中视频流打包、传输和延迟特性的表达式,并分别说明了提高重建图像质量的数据包模型、码流组织方式和满足不同延时需求的码流传输方法.仿真结果表明,提出的算法可以有效提高视频的传输质量和效率.研究结果可以用于实际SVC视频传输系统的设计.

Focusing on improving the video transmission efficiency and quality over the internet simultaneously, we put forward a video robustness transmission system, on the basis of which the Scalable Video Coding （SVC） characteristics description framework is proposed. The effective combination of Random Linear Network Coding （RLNC） technique and SVC technique is considered. The SVC characteristic expressions for packetization, distortion and latency are deduced respectively. The packetization algorithm, bit stream organization algorithm and bit stream transmission algorithm derived from the characteristics are introduced to improve video reconstruction quality and decrease transmission latency. Simulation results show that the proposed algorithms can lead to better performance. The conclusions are helpful in designing a practical SVC transmission system.