面向蔬菜病虫害视频移动获取的网络互通网关设计

网络互通问题是限制移动视频获取的关键技术瓶颈,为解决此问题,在前期关于视频分割、压缩、标注、检索等一系列研究基础上,设计出面向移动视频获取的网络互通网关,最终实现蔬菜病虫害视频的移动获取。首先对视频电话网络和IP网络的网络协议3G-324M和H.323进行了详细分析。进而基于不同网络协议原理的分析,设计出3G-324M与H.323的互通网关,包括信令网关和媒体网关两部分:信令网关负责处理信令(信号),实现视频电话网与IP网络间呼叫层面和系统层面的控制和互通;媒体网关负责数据传输,实现视频电话网与IP网络间媒体和数据层面的控制和互通。最终基于前期的研究基础和本文设计的网络互通网关,构建了蔬菜病虫害知识视频移动获取模型,实现了蔬菜病虫害的视频移动获取。此外还对视频获取模型进行对比试验,通过与传统方法的比较,证明所设计的网络互通网关和移动视频获取模型具有理论和实用价值。

Network Interworking Gateway Design for Video of Vegetables Harmed by Pests

Network interworking is a key technological bottleneck for the acquisition of mobile video. To solve this problem, based on the studies of video segmentation, compression, annotation and retrieval, the network interworking gateway for mobile video acquisition was designed which can eventually achieve the acquisition of mobile video of vegetables harmed by pests. Firstly, the 3G-324M and H.323 network protocol of video telephone network and IP network were analyzed in detail. Then, an interworking gateway of 3G-324M and H.323 was designed, which included signal gateway and media gateway. Signal gateway is responsible for handling the signal and realizing the control and communication of call level and system level between video telephone network and IP network. Media gateway is responsible for data transmission, realizing the control and communication of media level and data level between video telephone network and IP network. Finally, based on the previous research foundation and the network interworking gateway designed in this paper, a mobile acquisition model was built, and the mobile video acquisition of vegetables harmed by pests was realized. The comparative experiment was carried out on the video acquisition model. Comparing with the traditional methods, it proved that the proposed network interworking gateway and video acquisition model processed theoretical and practical value.