基于无线视频传感器网络的失真优化路由算法

摘要

According to the characteristics of wireless sensor network link with video transmission instability and poor reconstruction quality, this paper proposed an reliable transmission of routing algorithm ( EDLOR) which is adaptive to Multiple Description Coding ( MDC). Firstly, it took fully consideration about the video coding rate, delay-constrained, network packet loss and other factors. Secondly, it aimed at how to optimize multiple description of the Peak Signal-to-Noise Ratio( PSNR). As a result, the overall video distortion minimization was gained. Thirdly, these MDCs would be assigned to designed path for transmission according the computed results. It is shown from experimental results that EDLOR can improve the overall video quality through promoting the average PSNR and lowering packet loss rate.%针对无线视频传感器网络链路不稳定、重建质量要求不高的特点,提出一种适应多描述编码(MDC)可靠传输的路由算法EDLOR.该算法充分考虑了视频编码速率、时延受限、网络丢包等因素,以多描述峰值信噪比(PSNR)作为优化目标,使视频总体失真最小化；然后根据计算结果,将多描述编码分配到指定的路径进行传输.实验结果表明,EDLOR路由算法能够提高平均PSNR,降低了网络丢包率,提升了总体视频质量.