宽带无线网络中考虑信源编码特性的分层视频多播传输方法  

Layered Video Multicast Considering Source-coding Characteristic in Broadband Wireless Networks

作　　者：孙文珠[1] 王洪玉[1] 王洁[1] 唐震洲 

机构地区：[1]大连理工大学信息与通信工程学院,大连116024

出　　处：《电子与信息学报》2013年第11期2547-2553,共7页Journal of Electronics & Information Technology

基　　金：国家自然科学基金(61172058);高等学校博士学科点专项科研基金(20120041110011);中央高校基本科研业务费专项资金(DUT13JS09)资助课题

摘　　要：该文提出一种适用于宽带无线网络的分层视频多播传输策略。该策略将自适应调制编码(AMC)和分层视频编码相结合,首先将系统效用函数表示为与用户分布、系统资源及对应的调制编码方式(MCS)相关的函数,通过分别使用非线性整数规划和快速贪婪搜索两种方法对多播组内及组间分配不同的无线资源,以期达到最大化系统总效用函数的目的;然后根据资源分配结果对视频编码结构进行调整,使得视频编码分层结构与系统资源和用户信道条件相匹配。仿真结果表明,该策略优化了视频编码分层结构,充分利用了无线资源,提高了系统性能。A layered video multicast scheme for broadband wireless networks is proposed. The multicast scheme works by combining layered video coding with Adaptive Modulation and Coding （AMC）. The system utility is formulated into a function of user distribution, system resources, and corresponding Modulation and Coding Schemes （MCS）. By allocating different resources inter-and intra-multicast groups through nonlinear integer programming and a fast greedy algorithm respectively, the system utility is maximized. The layered video coding structure is then modified according to resource allocation, so that the layered structure is compatible with available system resources and the channel conditions of different users. Simulation results show that this scheme optimizes the layered structure of video coding, takes full advantage of radio resources, and improves the system performance.

关 键 词：视频多播 自适应调制编码 分层视频编码 

分 类 号：TN919.8[电子电信—通信与信息系统]