The thesis is about the design and realization of the network management software on dtv front - end , which is a part of the dtv development leaded by sichuan video electronic ltd corporation 本论文就是在四川省视频电子有限责任公司开展数字电视试验的背景下,进行了数字电视前端系统的网管平台软件的设计与开发工作。
This created not very orthodox solutions , and one of them is the installation of a front - end system above the transational system already existent in your company that - by any reason - cannot be substituted by a " pure " erp system 造成这种不太正统解决其中之一就是安装了前端系统转制以上贵公司既有制度该用什么理由- -不可替代的"纯粹"的erp系统
In addition , the author also introduces how to define managed object mib and designs the flow chart of snmp network management agent software . the author is one of the members of the key research project of chongqing 本文作者参与了重庆市的重点科研项目- cablemodem及其前端系统cmts的研制工作,主要从事这种网络的网络管理系统的研究和软件开发。
And the service of epg quality can effect on the economic income of the service provider . the epg system is composite of head - end system and tail - end system . the si server of head - end system can generate the si data , and the rail - end system can demux , decode si data , create si database at rom 电子节目指南系统包括前端系统和接收端系统。前端系统主要包括si服务器,负责si数据的生成,接收端负责si数据的解码,并在本地建立si数据库,通过用户友好的界面与用户交互。
A high performance receiver with high sensitivity and good antijaming ability has been manufactured . the receiver works at uhf frequence with 5 . 1mhz bandwidth , noise figure lower than 0 . 5db , gain more than 20db , and rejection more than 60db outside of the bands . the receiver consists of the htsc filter , low noise amplifier working at low temperature ( 77k ) and the cooler 该前端系统工作在uhf频段,工作带宽5 . 1mhz ,带内噪声系数小于0 . 5db ,带内增益大于20db ,带外抑制大于60db ;不仅具有很高的灵敏度,而且具有很强的抗干扰能力;主要由高性能的超导滤波器、低温低噪声放大器及制冷系统三部分组成。
According to the characteristic of dtv front - end system and its development in the future , the network management software is divided into two functional parts , one is the device server and the other is the user server . all the front - end equipments are managed by the device server , and the communication model between equipments and the device server is c / s structure base on tcp / ip protocol . the requests from users for browsing or modifying device parameters are managed by the user server , and the communication model between users and the user server is b / s structure based on tcp / ip protocol 根据数字电视前端系统的特点及未来发展的需要,本论文总体上把整个网管平台软件分为了设备服务器和用户服务器两个功能模块,所有的前端设备由设备服务器统一管理,它们之间的通信是基于tcp / ip协议的c / s结构;用户服务器负责处理用户浏览或修改设备参数的请求,它们之间的通信是基于tcp / ip协议的b / s结构。
We can provide digital interactive tv comprehensive application system , digital tv integrated head - end system , broadcast tv monitoring system , broadband ip data broadcast system , etc , which can give the solution on program transmitting of cable tv system , network management , subscriber management , conditional access and network monitoring , etc , to carry out the value - added operating of broadcast tv network 可以提供数字交互电视综合应用系统、数字电视集成前端系统、广播电视监测系统、宽带ip数据广播系统等,能全方位地解决有线电视系统中的节目配送、网络管理、客户管理、条件接收和网络监测等问题,实现广电网的增值运营。
Due to the limitation of individual ability and technological condition , we still use some traditional analog technology and can not accomplish board debugging of front - end system . however , this paper is an innovative and valuable study of digital ultrasound system , which is benefit for the engineers who engage in the relative field 受个人能力与技术条件所限,最终没有实现前端系统的下板调试,并且该方案设计中仍然沿用部分模拟技术,但整体上讲仍然是对数字化超声的大胆而有益地探索,对从事相关的技术人员有一定的借鉴意义。