Design And Implementation Of The Scheme About Resources Receiving And Show For The Set-Top Box Which Supports Remote Satellite System

After many years of practice and exploration, the Party members and cardres of modem distance education project and the cultural information resources sharing project have carried out fruitful cooperation and achieved remarkble results, through the establishment of sharing working mechanism.Satellite mode of distance education has played an important role in promoting of education and cultural resources transmission, as the main mode of distance education service in the network less developed areas. Satellite terminal receiver of distance education, reallized the receiving of distance education resources transported by China Education Broadband satellite Net(CEBsat), is an important part of distance education terminal system of the satellite mode.First of all, this paper describes the IP datacasting system of satellite mode of distance education, including the basic principles of the system, the resources pushed by satellite distance education, the front-end broadcast system of CEBsat and terminal receiver system of satellite site.Secondly, the paper clarifies the technology of IP over DVB-S and introduces MPE and ULE on IP data encapsulation. In the software system level, the design and the implementation is given about the way to receive and show the resources of distance education transported by DVB-S satellite datacasting in the embedded terminal system. In the actual project, the writer has mainly taken part in the terminal implementation of the file receiver module and the IP over DVB-S receiving gateway system which are important components of terminal receiver system and are introduced in the paper in detail.Among the part of the design and the implementation of file receiver module, the paper introduces two designs to show resources. As the differences between the nature of video courseware and web page, both of the two designs use different display process.In the last, combined with practical application of satellite terminal set-top box in the distance education, this paper introduces the method to solve the problem while receiving multiple IP datacasting services, the design of remote terminal software update and local distance education resource satellite program in detail, based on the DVB-S satellite datacasting.