Design Of Terrestrial Digital TV Set-Top Box

August 30, 2006, the State Standards Committee officially announced the "digital television terrestrial broadcasting transmission system frame structure, channel coding and modulation." as the national standard. The national standard combines Qinghua University's multi-carrier programme DMB-T and Shanghai Jiaotong University's single-carrier programme ADTB-T. With the publication of national standards, more and more cities have begun to experiment mobile broadcast TV technology. At the end of 2007, more than 30 cities have taken part in the experiment.This thesis is the study of digital TV set-top boxes. The STB can receive the digital TV signal in line with the national standard. The major work includes:Firstly, introduces the hardware principle and its basic characteristics, software development platform and its basic architecture.Secondly, introduces the design of infrared receiver system in detail, including the basic principles, the receiving mode, the processing of the key, and so on.Thirdly, introduces the design of the basic pinciple of OSD, OSD control processes and signal processing methods, picture processing, and so on.Fourthly, introduces the design of database system in detail, including FLASH modules, database modules and the basic design principles.Fifthly, introduces details of the search process and channel switching strategy, describes why the present channel search speed and switching speed are quick.Sixth, introduces the terrestrial digital TV-related standards, the basic principle of demultiplexing and how to design the demultiplexing in the system.Finally, a comprehensive evaluation of the system and the existing problems and its solutions are given.