The Design And Development Of Digital-TV Receiving System For PC Based On USB2.0 Protocol

DTTB (Digital Television Terrestrial Broadcasting), as one of the three digital television spread methods, has the strictest request to the whole technology system, due to the complex ground channel and mobile function, in addition to portable reception. Researches in this field have been carried out and breakthrough progress has made already in our country. DMB-T, brought forward by QinHua University is the brightest star; Researches and development based on this kind of standardization have been in progress, especialy in the field of mobile receiving technology, and receiving digtal-TV by PC will be the incoming breakthrough. In order to achieving this goal, some problems need to be solved, including the high speed transfers of data, demux of PS, and decode of audio&video. This paper attacks these problems and brings forward a valid solution scheme. Based on this scheme, a digital TV receiving system is developed, which realizes the receiving and replaying functions for digital programs with PC.This paper mainly studied the application about usb2.0 protocol in this system, and realized a system with a function of mobile reception and play in time. The main contend in this paper is as followed:1. Studying software and hardware in realizing this system and all kinds of performance data index, Using USB2.0 protocol CMOS chip to realize transmitting in time in high-speed data stream.2. Studying firmware design method by USB2.0 CMOS chip working in collaboration with FPGA cooperation and per work model characteristic, Realizing reasonable firmware designing and working model.3. Studying the working model of host computer device driver and the method of downloading firmware through default USB device, giving material program logic.4. Studying program structure of vlc, Realizing USB plug-in about real-time data reception in collaboration with relevant tools.