MDC融合多径路由的无线图像传输方法  

Wireless image transmission method based on fusion of MDC and multipath routing

作　　者：李敬伟 孙波 王宏伟[2] 

机构地区：[1]河南工学院计算机科学与技术系,河南新乡453002 [2]华中科技大学计算机科学与技术学院,武汉430074

出　　处：《计算机应用研究》2016年第7期2117-2121,共5页Application Research of Computers

基　　金：国家自然科学基金资助项目(70890081);河南省高等学校重点科研项目(16B520009);河南省高等学校青年骨干教师计划资助项目(2011GGJS-198)

摘　　要：针对具有时间约束图像的无线网络传输中的数据出错和丢失问题,提出一种多重描述编码(multiple description coding,MDC)结合网状多径路由的图像传输方法。源节点利用MDC将图像帧分成多个等同重要的描述,利用提出的多径路由策略寻找多条边不相交路径,并选择合适的中间合并点对描述进行合并,利用链接错误信息对受损描述进行中间修复,目的节点利用2×2过滤器和像素错误概率权重进行解码,根据其空间邻居插补丢失或损坏的像素。实验结果表明,提出的方法能够有效提高无线信道的容错性能,实现高信噪比图像传输。For the issue of the time constraints image data error and lost in wireless network transmission, this paper proposed a wireless image transmission method based on fusion of multiple description coding （MDC） and multipath routing. Firstly, source node used MDC to divide image frame into several equally important descriptions. Then,it used the proposed muhipath routing strategy find multiple edge disjoint paths and selected the appropriate intermediate merge points to combine descriptions, and intermediately recovered the damage description by using link error information. Finally, the destination node used 2 × 2 filters and pixel error probability weight to decode, and interpolated the missing or damaged pixels according to spatial neighbor. The experimental results show that proposed method has effectively improved the error-resilient ability of wireless channel and realizes image transmission with high signal-to-noise ratio.

关 键 词：无线MESH网络 图像传输 多重描述编码 多径路由 中间节点恢复 容错性能 

分 类 号：TP393.07[自动化与计算机技术—计算机应用技术]