有线电视系统的发展.doc

安徽工贸职业技术学院 毕业论文 题 目 有线电视系统 摘 要 步入21世纪以来，全国有线电视网络有了长足的发展和进步，普及程度非常高，早已进入了千家万户，由于其收费低廉，节目丰富，受到社会的普遍欢迎，但仍有许多不足之处需要完善，因此，有线电视网络的发展和完善是社会各界人士关注的热点问题之一。 本文首先叙述了有线电视网络的发展历程及有线电视系统的基本概念，然后着重介绍了有线电视系统的组成和它的性能指标，包括其涉及到的各项参数要求，接着描述了有线电视网络的几种传输方式，并将它们的构成，技术特征，优缺点做了详细的叙述，最后，分析了有线电视网路的发展趋势，以及其不足之处需要改造的地方并将改造的方式，实施方案都做了介绍。 有线电视网络有比较广阔的发展前景，但是其发展也面临着许多挑战，还有许多技术问题需要研究解决。不过通过专家学者们的共同努力，我相信有线电视网络将会进一步发展和成熟起来。 关键词：有线电视网络，现状与趋势，发展前景，升级改造 Abstract Entered since twenty-first Century, national cable television network has been considerable development and progress, its popularity is high, already entered thousands of households, due to its low fees, the program is rich, generally welcomed by the society, but there are still many deficiencies need to improve, therefore, the development of CATV network is one of the hot issues and improve the social from all walks of life concerned. This paper describes the basic concept of the development of cable TV network and cable television system, and then focuses on the cable TV system and its performance indexes, including the requirements of various parameters related to it, and then describes several modes of transmission of CATV network, and their composition, technical characteristics, advantages and disadvantages in detail, finally, analyzes the development trend of the cable TV network, and its shortcomings need to transform and the transformation of the way, implementation scheme are introduced. Cable television networks have relatively broad prospects for development, but its development is also faced with many challenges, there are many technical problems need to be studied and solved. However, through the joint efforts of experts and scholars, I believe that the cable TV network will be further developed and mature.目 录 摘 要 I 目 录 III 第一章 概述 1 1.1有线电视网络的发展 1 1.2有线电视系统的基本概念 1 第二章 有线电视系统的组成及性能指标 3 2.1有线电视系统的组成 3 2.2有线电视系统的常用参数 3 2.3 系统性能指标 4 2.3.1下行传输系统主要技术参数要求 4 2.