摘要
针对IP网络视频通信中数据分组丢失严重影响视频通信质量的问题,引入具有良好抗分组丢失性能的RS信道编码方法,在深入分析基于RS码的网络环境下的端到端视频传输失真基础上,提出了一种基于RS码的IP网络环境下的网络视频信源信道联合编码（JSCC,joint source channel coding）方案,该方案可以根据当前网络的丢包率,将网络可用带宽在信道编码和信源编码之间进行最优的分配,使得端到端的传输失真达到最小。实验结果表明,与选择固定信道编码速率方案相比,当网络丢包率小于5%时,该方案可以提高重建图像的峰值信噪比0.8~1.5dB,显著提高传输的可靠性。
An end-to-end video transmission distortion is analyzed based on the error characteristics of RS code in IP network.Then an joint source channel coding（JSCC） over IP network channel is proposed,which could optimize the rate allocation of the available network bandwidth between source coding and channel coding adaptively according to the actual condition of current network channel,so as to improve the robustness of the video transmission.The experiment results indicate that,compared with fix choice of channel coding rate,the proposed JSCC scheme can improve the peak SNR 0.8~1.5dB,improve the transmission robustness greatly and achieve better reconstructed video quality at the receiver when the rate of packet loss is under 5%.
出处
《电路与系统学报》
CSCD
北大核心
2011年第3期11-17,共7页
Journal of Circuits and Systems
基金
浙江省工业攻关资助项目(2009C31G2210013)
