Research Of The DMB-TH Receiving System Based On USB2.0

TV technology has experienced monochromic TV and colourful TV times,in order to improve the quailty of voice and image and the using rate of the channel, it will be developed to be digital and High-Definition. Digital TV will be replace analog TV gradually. According to different transport systems, digital TV broadcasting systems can be divided to cable digital TV broadcasting system,satellite digital TV broadcasting system and terrestrial digital multimedia /TV broadcasting system. The terrestrial digital multimedia /TV broadcasting system can be implemented easily, have high using rate of channel,and support mobile and portable receving.It can satisfy people gain information by mobiling.Now terrestrial digital multimedia /TV broadcasting standard has come out in our country—DMB-TH.By far, DMB-TH can satisfy the requirements of the terrestrial digital multimedia /TV broadcasting in the following aspects: feasibility in technology,stability in system,industrialization and feasibility in management.In this background, this item supply a new mobile digital TV receving system for portable computer and PC.It support mobile and portable receving,and can satisfy people to watch TV in anytime and anywhere without cable.First, this paper introduced the current statement and standard of digital TV around the world, analyzed and compared them, and then mainly introduced the system design of the DMB-TH mobile receiving card based on USB2.0, especially introduced the hardware design of the system. In the chapter of hardware debugging, the paper mainly introduced the debugging theory and flow of the USB2.0 interface module. At last, the project summarize is presented.