Digital Television Data Broadcasting Applications

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.