井下无线多媒体传感器网络图像传输技术研究

Research on Image Transmission of Wireless Multimedia Sensor Network in Coal Mine

本文在分析分布式视频编解码技术具有低复杂度、低存储、低能耗的特点以及无线多媒体传感器网络具有自组织性、放置灵活、移动性强等特点后;根据煤矿巷道狭长的特点,设计一种煤矿井下救灾应急通信系统,并以此系统框架为基础提出了适于井下长距离分布式图像编码传输技术和基于伙伴协助的图像传输方案:多媒体节点将采集到的图像首先进行量化处理,然后将压缩任务分布到伙伴节点,伙伴节点将压缩后的数据传输给簇首,最后由簇首转发该压缩数据至汇集节点,在地面的服务器上进行解压缩和数据融合,合成分辨率较高的图像。最后通过与传统三种基于簇的图像传输方案比较,本文提出的基于伙伴协助的视频流传输方案极大地缓解了多媒体节点的能耗压力,很好地平衡了网络节点能耗,更能有效地延长网络的生命周期。

This paper discusses the distributed video coding which is Low complexity, low memory and low power.Than discusses the self-organization, flexibility and strong mobility of the wireless multimedia sensor network.According to the characteristics of strip coal mine tunnel,design of wireless rescue communication system in coal mine.Based on that system framework, the long-distance distributed image coding transmission technology and the Image transmission system based on partner assistance in coal mine are proposed.The multimedia nodes will quantify the collected image,and then distributed compression tasks to the partner nodes.The partner nodes send the compressed data to the cluster head.Finally,the cluster head node forward the compressed data to the collection.the server on the ground,when decompress and fusion data, reconstruct the high -resolution images.Finally, Compare with the three traditional kinds of cluster -based image transmission schemes, image transmission program based on partnership was verified effective as a suitable coal mine emergency communication system in reducing network energy consumption.