【作者】 陈亮；

【导师】 张延华；

【作者基本信息】 北京工业大学 ， 电路与系统， 2004， 硕士

【摘要】 摘要近年来随着多媒体和网络通信技术的飞速发展，视频、图象、计算机视觉、多媒体数据库和计算机网络技术、通信技术日益融合，遍及国民经济和社会生活的各个方面，处于核心地位的视频传输，尤其是无线信道中的视频传输，已随着无线通信带宽的增大和数据传稳速率的提高，逐渐成为无线通信业务的新的需求。而计算机科学的发展和应用领域的不断扩大，也对计算机应用技术提出了越来越高的要求。特别是当计算机硬件有了飞速发展之后，计算机仿真技术也得到了迅猛发展，在许多行业都得到了广泛的应用。面向对象技术作为一种新的软件开发思想，已经得到越来越广泛的应用，它采用对象、类和继承等概念，可以使开发的软件系统具有通用性、可扩充性、易维护性等特点。因此结合了面向对象思想的面向对象仿真建模技术成为人们研究的热点。针对典型信道研究了多种调制方式以及不同的信道编码方式对系统传输性能的影响，构建了有特色的无线视频系统图视仿真模型，实现了实时播放。本文第四章针对移动信道的一些固有特性，如具有多路径快衰弱效应，而多路径快衰落效应造成的移动信道长突发误码（long burst）又是影响通信质量的主要原因，为此本文根据国外移动信道的实测无误串分布曲线（G(m)~m）仿真建立了三状态 MARKOV 模型的信道模型,并在此基础上构建了一个视频传输模型和一个基于混合信道视频传输系统模型。针对压缩视频信源传输，设计了跨不同仿真平台的接口函数，实现了压缩视频数据的传输和解压视频数据的播放。更多还原

【Abstract】 ABSTRACT In recent years,with the development of multimedia and IP communication,video、image、computer vision、multimedia database and computer networktechnology have com out in every aspect of national economy and social life,the video transmission that is in key position, especially the video transmissionin wireless channel,has gradually become the new demand of wirelesscommunication business with the the increase of wireless communicationbandwidth and the improvement of data transiation. The development ofcomputer science and the extension of application domain have also putforward more and more high requirement for computer application technology.Especially after the rapid development of computer hardware, the computersimulation technology are improved greatly.Object-oriented technology is anew thought in software development, has been applied in many area ,andadopts object class and inheritance. So object-oriented simulation theorywhich combines with object-oriented htought is the research hotspot now. To study transmission capability of the modulation and channel coding intypical channel,establish a characteristic wireless video communicationmodel,realize the real-time play. For some character of mobile channel such as multiway fading effectwhich causes long-burst error, It establishes an three-state markov model 、acombinational channel(RAYLEIGH+RICIAN+AWGN channel),and a videocommunication model based on MARKOV and combinational channel. To realize the compressed video source transmission,design interfacefunction over some simulation enviroment.更多还原