The Design And Implementation Of Mobile Digital TV Receiver Based On DMB-TH

Digital TV is one of the most promising industries, and china has also launched its own digital television terrestrial broadcasting (DTTB) standard. Under this situation, various digital TV products based on DMB-TH have been developed, protable mobile TV receiver is one of them.This thesis is based upon a project the author participated in, the project is designed to develop a protable mobile multimedia equipment which can play digital TV at any time, any place. The design and implementations of a mobile TV receiver are mainly researched in this thesis. The TV receiver system consists of three parts: channel receiving and demodulating module, TS demultiplexer and MPEG decoder. According to the constituation of the receiver, the follow contents are discussed in this thesis: Firstly, the software and hardware system of the TV receiver is studied, such as hareware platform, OS and the key design of the application; Secondly, a tuner driver is designed, the tuner adopts DMB-TH standard; thirdly, a method using FPGA to realize PID filter and software to realize section filter is given, which is economical, flexible and easily upgrade; A intuitive and attractive Human Machine Interaction is crucial to mobile products, the user interface module is made for use digital TV recevicer easily, so fourthly, a user interface module is realized, it's hardware layer based on OSD unit and touch screen controller, it divides into three module: input module, user manage module and ouput module, it has a clear framework and has transplantate possiblity; At last, some problems of the system is optimized at the end of the thesis.After the project is done, the sample machine of the mobile TV receiver has been made. The sample receiver can receive DMB-TH signal expediently and play TV fluently, which reach the expectant goal.