面向无线网络的可伸缩视频编码传输策略  

SVC transmission scheme over wireless networks

作　　者：田波[1] 蔡述庭[2] 杨宜民[2] 

机构地区：[1]铜仁学院信息工程学院,贵州铜仁554300 [2]广东工业大学自动化学院,广州510090

出　　处：《计算机应用研究》2016年第8期2467-2469,2474,共4页Application Research of Computers

基　　金：国家自然科学基金资助项目(61201392);铜仁学院博士科研启动基金资助项目(trxy DH1503);贵州省科技厅科技合作计划资助项目(黔科合LH字[2015]7251)

摘　　要：针对现有面向无线网络的可伸缩视频编码(scalable video coding,SVC)传输策略未能充分考虑失真和能耗的问题,提出了一种基于失真和节点能耗最小化的SVC传输策略。该策略在分析SVC的编码失真、传输过程中丢包失真的基础上,计算了接收端的视频失真总和;通过计算SVC传输系统的功率,对无线网络中的节点能耗进行了分析;然后综合考虑了能耗、传输时间及质量要求,将SVC的传输策略转换为一个优化问题,进而得到最优的SVC编码参数,在获得较优视频质量的前提下实现了SVC的可靠传输。仿真实验结果表明,与目前典型的SVC传输策略相比,该策略不但有效降低了SVC传输过程中的平均失真,而且在相同的能量消耗水平下获得了更好的视频质量。For the convenlional transmission schemes for SVC over wireless networks without take into account the distortion and energy consumption, this paper proposed a SVC transmission scheme based on minimizing the distortion and energy con- sumption. The scheme calculated the total video distortion according to distortion which caused by coding process and packet loss event, and analyzed tile energy consumption of nodes based on the power of transmission system. Then it formulated the SVC transmission scheme as an optimization problem subject to the transmission energy consumption, time and quality con- straints, and obtained the coding parameters by solving the problem. Simulation results reveal that the proposed scheme reduce the average distortion, and achieves notable video quality improvements under the same energy Consumption, compared with the typical conventional scheme.

关 键 词：无线网络 可伸缩视频编码 传输 能耗 

分 类 号：TP393.09[自动化与计算机技术—计算机应用技术]