The Design And Implementation Of DVB-T Set-Top-Box

With the development of the broadcasting technology, it's obviously that digital broadcast and television will take the place of simulation broadcast and television. As a very important part of the DVB standard, the study of DVB-T system is very valuable. And the terminal set-top-box plays an important role of the system. The capability of signal processing in wireless and mobile situation is the obvious advantage of DVB-T system compared with DVB-S and DVB-C systems. And the service of digital broadcast and television is extended by the capability of DVB-T system. The performance of signal processing is the key role of DVB-T set-top-box.This paper introduces a DVB-T set-top-box design based on the platform of LSI SC2005 according to the research of the technology about DVB-T set-top-box, such as the DVB standard, COFDM demodulation and MPEG-2 encode and decode technology.The DVB-T set-top-box contains some modules. Hardware design and software design of a few important modules are introduced.The structure and the demodulate process of the net interface module is introduced at first. A state machine and the drivers of the digital terrestrial front-end are designed in this paper. Then the circuit diagram of this module is analyzed.Demultiplexer is another important module of the DVB-T set-top-box. Channel and buffer manage, filter control are important steps of the demultiplexing process. Drivers of this module is also designed and introduced in this paper. A communication port for the user of the DVB-T set-top-box is implemented.