The Research And Realization Of Kernel Technologies About DVB-S Set Top Box Of Digital TV

With the development of the business of digital video broadcasting, the DVB-S Set Top Box (STB) is used widely which is the terminal equipment of the digital video broadcasting system. It needs a kind of transforming machine to receive and show the digital TV program by the analog TV set, so set top box is coming .STB could receive the digital television signal and could handle the signal to becoming the analog sound and video signal, at last it could be shown on the analog TV set. So the research of STB is valuable for theory and reality.In the paper, it first discusses the theory of STB and it introduces video coding technology, the MUSIC CAM algorithm of sound coding and the MPEG-2 system multiplexing technology. This paper researches the design and development of STB which is based on the ST5105. It gives out hardware design and software layers structure which is based on the embedded system STLite/OS20. During designing the applying layer program, it adopts the rule of module. It works hard to keeps the independence among the modules and establishes the flexible communication rules to accomplish the requirement of timing and applying function.After building the platform of hardware and software, I accomplished the design of the module of program managing and operating. I researched the PSI of MPEG-2 standard and the SI of DVB standard, at the same time I developed the function of automatic searching program and searching program by hand. At the same time I designed the communication rules and analyzed the saving situation of Flash and finished the coding of software promoting by air and serial interface. And I researched the methods of improving the speed of software promoting by serial interface. At last, it discusses the overall and the prospect.