基于相对排队延时的无线视频传输研究  

Relative queuing delay based wireless video transmission

作　　者：万征[1] 方志军[1] 王正友[1] 

机构地区：[1]江西财经大学信息管理学院,南昌330032

出　　处：《中国图象图形学报》2011年第5期703-709,共7页Journal of Image and Graphics

基　　金：国家自然科学基金项目(60862002;60863016;60963011);江西省自然科学基金项目(2008GQS0015;2009GZS0022)

摘　　要：无线接入和视频应用的日益普及使无线视频传输成为新的研究热点。随着研究的深入,跨层优化和不平等保护的思想逐渐为大多数研究所采纳。基于IEEE 802.11 e协议研究无线视频传输质量的改善方法,提出一种综合考虑视频帧优先级和相对排队延时、适用于优先级数目有限的任何编码算法的视频帧调度算法。仿真实验结果表明,提出的算法具有远高于标准EDCA及其已有改进方案的平均峰值信噪比。With the popularity of wireless access and video applications, wireless video transmission is bringing more attention. In most papers, the ideas of cross-layer optimization and unequal protection were adopted. To improve transmission quality of wireless video streams, a novel scheduling algorithm which integrates priorities of video frame with ＂ relative queuing delay＂ and is suitable for any coding algorithm with limited priorities under IEEE 802.11 e is proposed in this paper. Simulation results show that average peak SNR of proposed algorithm is much higher than those of EDCA and existing improving scheme.

关 键 词：视频帧调度 相对排队延时 不平等保护 优先级映射 

分 类 号：TN919.8[电子电信—通信与信息系统]