大学毕业论文-—数字电视发展探讨.doc

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1、江西现代职业技术学院毕业论文（设计）题目：数字电视发展探讨I论文题目：数字电视发展探讨姓名：舒文明班级：09应用电子班指导教师：陈慕君摘要：数字电视作为新的产业形态，正在形成全新的产业链。它不管是在市场还是性能方面都要优于模拟电视，所以倍受客户的青睐和关注，更有厂家宣布两年内会淘汰模拟电视，实现全新的数字电视时代，从而数字电视的发展前景是无量的。关键词：数字电视发展背景；产业链；商业模式；功能分析；发展前景和策-24-目录0引言······················································31数字电视的概

2、念背景及数模比较······························41.1数字电视概念··········································41.2数字电视发展的背景····································41.2.1数字电视概况········································51.2.2数字电视的标准······································71.3数字电视与模拟电视对比·····················

3、···········92数字电视的功能分析········································102.1MPEG-2标准简介以及数字电视功能分析····················102.2关于传输流及传输流中的几个概念························11-24-2.3数字电视中的编解码器的同步机制························132.3.1MPEG-2中的码流结构··································132.3.2时间模型···············

4、·····························152.3.3时间标签定义及同步机制······························152.3.4系统时钟恢复········································172.3.5dts/pts的管理······································172.3.6pts/dts同步实现和失步处····························183数字电视商业模式································

5、··········194我国数字电视的发展前景及策略······························204.1数字电视的主要驱动因素································204.2中国彩电市场容量大····································204.3机顶盒的发放费用、消费习惯和内-24-容······················215结束语····················································226参考文献···········

6、·······································23数字电视发展探讨0引言随着2008年奥运会的举行，我国政府提出“数字奥运”在媒介的网络化、信息的数字化、传播的全球化形成了多元化的媒介技术环境和文化环境中，我国数字电视的发展仍然值得关注。世界各国都在大力发展数字电视以及相关产业，我国国内数字电视也已经开始走上产业化、规模化之路，不过由于技术标准没有及时明确订立，商业模式未明、电视节目内容缺乏等诸多因素制约了国内数字电视产业的发展速度。美国、日本、欧洲等国家在数字电视领域的发展较之中国要迅速得多，其数字电视事业的发展取得

7、了突破性进展，他们的数字电视技术标准、产业模式、内容、网络建设经验等对借举办奥运会的东风，迅速发展数字电视产业的媒介而言具有一定的借鉴意义。数字电视作为新的产业形态，正在形成全新的产业链，是一项大产业工程，需要产业链各环节紧密配合、高度协同，以开放的心态积极沟通交流，展开多角度、多层面、多范围的联合与协作，构建“多赢”的利益联结机制，促进数字电视产业链的建设不断发展和完善。-24-1数字电视的概念、背景及数模比较1.1数字电视概念数字电视:(DigitalTV)并非是一种电视机!它是包含了从摄制、发送、传输到接收的全过程，是给电视用户提供的一种“服务

8、”，简单的说，数字电视DTV就是拍摄、编辑、制作、传输、接收等全过程都使用数字技术(也就是信号全用0和1表示