数字电视数据广播的研究与应用

【作者】 翟恩；

【导师】 王匡；

【作者基本信息】 浙江大学 ， 信息与通信工程， 2006， 硕士

【摘要】 随着国家数字电视广播制定的“2008年数字高清晰电视将在国内主要城市普及和商用播出;2010年计划全面实现数字电视广播;2015年停止播放模拟电视广播”的“三步走”计划,国内的数字电视产业正在迅速蓬勃地发展。做为数字电视和传统模拟电视的一个主要的区别——数据业务为数字电视用户提供内容丰富、形式多样信息服务,同时也成为数字电视产业的重要增值业务。 目前,在数字有线电视网上提供宽带数字业务的主要途径是数据广播系统,数据广播做为数字电视的一个重要部分,欧洲的DVB系统和北美的ATSC都开展了相应的研究和标准制定工作。本文根据国内普遍采用的DVB标准规范的数据广播原理,设计和实现了基于DVB数据广播技术的数字机顶盒软件在线更新和数字电视数据方播的U—U系统。 首先介绍了数字电视及其标准、数据广播和数字电视机顶盒的基本概念,并引出了本文的研究任务。并对项目开发中运用的DVB数据广播规范进行了研究,介绍了MPEG-2和DVB的基本概念,讨论了在数据广播系统中,两者间的相互关系,为实际应用打好了理论基础。 其次,分别重点描述了基于DVB数据广播的数字机顶盒软件在线更新和数字电视数据广播系统的实现方案。并分别给出了具体实现方法。 最后,对论文期间的工作进行了总结,并对今后的数字电视数据广播业务的发展进行了展望。更多还原

【Abstract】 With the "three steps" schedule framed for national digital TV broadcasting, the HDTV will broadcast in main city of our country commercially in 2008 and digital TV broadcasting will put into use at the round of 2010 and the analog TV broadcasting will be stop in 2015, the digital TV is being developed vigorously in our country. The data service, which is a primary difference between digital TV and analog TV, provides the information service with abundance content and multi-modality, and it has been the main increment service of digital TV industry.At nowadays, the key technology for broadband data service on CATV network is data broadcasting. Data broadcasting system is a main component of digital TV system, Both the DVB in Europe and the ATSC in the North America have made research and constituted standard. According to the data broadcasting principle of DVB specification adopted by our country, this paper designs and implements software online update of digital set-top-box and the U-U system of data broadcasting for digital TV.Firstly, The digital TV and its standard and the basic conception of data broadcasting and digital set-top-box are introduced, and the task of this thesis is educed, and this paper gives the DVB data broadcasting specification which is used for item development, introduces the basic principle of MPEG-2 and DVB, and discusses the correlativity of them,Secondly, the paper discuses the application of DVB data broadcasting, offering the implementation project of software online update of digital set-top-box and data broadcasting system of digital TV, and gives the way for realization.Finally, the paper summarizes the work during writing this thesis, and talk about the future of data broadcasting of digital TV.更多还原