Design And Implement Of Ditital TV STB Based On STi5105

Digitallization is a worldwide industrial technology innovation, and digital technology has been touching most fields of our social lives. From 90's of 20th century, the technology of digital television, as one of important branches of digital technology, develops fast end enters an applied phase, with the rapid progress of the technology of semiconductor and computer.Because it will take a long time to change from the existing analog televisions to digital television system, a kind of conversion devices is necessary, it in turn leads to the emergency of digital television Set Top Box (STB), for the sake of receiving digital television broadcasting with analog televisions. Digital televison Set Top Box is a kind of household electronic devices that can receive the digital television signal transmitted by digital television broadcasting system, make some very important processes to the signal and output an analog signal of video and audio that exiting analog television can paly the programs with the signal.This paper, whice is based on the system blue print of STi5105 provided by Company ST Microelectronics, is a research on receiving technology of STB of cable digital television conformed to MPEG-2 and DVB-C. In this thesis, research is focussed as followings:(1) the hardware system is designed from the point of view of knowledge of STi5105 interior modules and its exterior modules;(2) The function of every software level and realtime operation OS20 is also discussed in detailedly;(3) The FLASH driver and control & testing procedure of front-panal is programmed;(4) The platform of hardware system is debugged;(5) The circuit of audio/video process is analysis and emulated, and the means of performance debugging is also given.The project has got validification of the Bradcast Department and has been manufactured.