The data access pattern is divided into exclusive and sharing , according to the pattern of access and update frequency of the data , three ways are adopted , i . e . the period , update counter and data state to dynamically adjust the frequency and content of data broadcast 将数据的访问形式分为共用和独占两种,根据数据访问形式以及数据的更新频率,采用定时、计数以及数据状态等三种方法,动态地调整服务器广播更新数据的频率和内容。
The products of our company mainly include digital tv conditional access system ( cas ) , subscriber management system ( sms ) , electronic program guide ( epg ) , stb , middleware , security broadcast monitoring facilities , data broadcast system , and data broadcast receiving card , etc 公司现阶段的产品主要包括数字电视条件接收系统( cas ) 、用户管理系统( sms ) 、电子节目指南( epg ) 、机顶盒、中间件、安全播出监测设备、数据广播系统和接收卡等。
It is described in detail that the current situation about the theory research and application of agent technology , the latest developments and problems in the data broadcasting system are introduced , and , a solution to such problems based on this technology is offered . 2 对智能体技术的理论研究和应用现状做了较详细的综述,介绍了数字广播系统的发展现状及存在的问题,提出了基于多智能体技术建立数字广播信息平台的研究设想。
Chapter 3 presents our solution for data broadcasting and our implementation method of ip - catv / catv - ip gateway , including system architecture , software and hardware implementation , and sopc technology based on nios soft cpu core . the two features of this embedded fpga technology and the methods using to improve system performance are also discussed in detail . finally , the analysis of system performance is made 第三章介绍了我们自己的数据广播系统方案及ip - catv和catv - ip网关方案,包括系统结构及构成、软硬件实现方案、使用nios软核的sopc技术,并重点介绍了sopc技术区别于传统嵌入式技术的两大特性以及利用它们来提升系统性能的方法,最后对系统性能进行了分析。
The goal of our porject is researching and implementing a system which can receive and handle the broadcasting data . at first we simulate the data broadcast server and client based on the theory of multicast and data broadcast . then we expand the activity rule and use it to help us manage the receiving system . at last we design a quick filter which can filter the useless imformation at the very start 本项目的设计目标是研究和实现能够主动收集和处理广播数据的系统,本文首先利用组播和数据广播的原理实现了一个数据广播的模拟播出和接收系统,在这个系统的基础上,扩展了主动数据库的主动机制,使之能够灵活的嵌入到我们的系统中,最后设计了一个广播数据的快速过滤器,使用户能够快速的过滤掉无用的信息。