文档字数：13618
目录
摘 要 3
第一章 数字电视技术概述
1.1 数字电视 5
1.1.1 数字电视的概念 5
1.1.2 数字电视工作过程简述 5
1.1.3 数字电视的主要优点 5
1.1.4 数字电视的分类 5
1.2 国际的三种标准 6
1.2.1 美国的ATSC标准 6
1.2.2 欧洲的DVB标准 6
1.2.3 日本的ISDB标准 7
1.2.4 三种标准的比较 7
第二章 MPEG-2编解码原理的研究
2.1 MPEG-2编码器原理 8
2.1.1 MPEG-2编码标准的基本概念 8
2.1.2 MPEG-2数据压缩原理基础 9
2.1.3 MPEG-2压缩编码原理 12
2.1.4 MPEG-2视频比特流（ES）结构 14
2.1.5 MPEG-2系统传输层结构 15
2.2 MPEG-2解码器 16
2.2.1 解码原理 16
2.2.2 MPEG-2解码集成电路 17
2.2.3 MN677531KA解码芯片的应用 17
第三章 数字电视接收机原理
3.1 数字电视接收机原理分析 20
3.1.1 DVB标准的数字电视接收机介绍 20
3.1.2 典型数字卫星电视接收机原理分析 21
第四章 我国数字电视的发展前景
4.1 我国数字电视现状 23
4. 2 我国数字电视发展的展望 23
结束语 24
附录 参考文献 25
致谢 26
毕业设计说明书（论文）中英文摘要
Title The digital television codec principle
analysis and design
Abstract
Along with the electronics technical develop increasingly and the life quality of people is to increases continuously, digital television with it of high and clear appearance and the well sound effect attract more and more people.The digital television has the high quality the stability, usage convenience, well-found etc.Current our country of digital television is being placed in the development, in the near future digital television then would at get the universality application.
This text show first the digital television technique in total.Introduced the basic concept of the digital television, and basic characteristics etc.And did the introduction of the synopsis to three kinds of digital television system type of the international top in now with compare.This text point solves to the MPEG-2 codec technique,because this is the core technique of the digital television system.Behind it,I analysis digital television receiver principle briefly.Did the synopsis introduction with the foreground to our country the circumstance of now of the digital television finally with outlook.The illustration of all this text draws with the software of FireWorks, the formula draws with the MathType.
The research of the digital television has become the popular lesson an effort for, believing at governmental support in our country with numerous experts now under that technique would be increasingly mature with perfect.
Keywords analog TV digital TV MPEG-2 DVB DCT VLC
Motion Compensation Motion Estimation
[摘要]
随着电子技术的日益发展以及人们生活水平的不断提高，数字电视以它的高清晰画面和富有吸引力的音响效果而越来越受到人们的亲睐。数字电视具有高质稳定、使用方便，功能齐全等特点。目前我国的数字电视正处在开发之中，在不久的将来数字电视便会在得到普及应用。
本文首先对数字电视技术进行了综述。介绍了数字电视的基本概念，以及数字电视的基本特点等。并且对当今国际上的三种数字电视制式做了简要的介绍和比较。本文重点对MPEG-2编解码技术进行了分析和说明，因为这是数字电视系统的核心技术。之后对数字电视接收机原理做了一些简要的分析。最后对我国数字电视的当今情况和前景做了简要介绍和展望。本文所有的插图用FireWorks软件绘制，公式用MathType绘制。
数字电视的研究目前已成为热门课题，相信在我国政府的支持和众多专家的努力之下该技术会日益成熟和完善的。
[关键词]
数字电视 模拟电视 MPEG-2 DCT变换 可变长编码 运动补偿 运动估计
