| Digital TV is now widely developed and would take the place of traditional analogue TV. The technology of DTV Head-End is also a hotspot in research. Which bridges the DTV source and distribution network. This paper would mainly discuss some key technology about DTV transmission system.First, in this paper, the system structure and development actuality a reintroduced in brief, and the importance of transmission technology in DTV is pointed out. In chapter 2 , based on DVB standard, some important technology-convolution code, digital modulation and echo equalizer are introduced. The structures of DVB-C, DVB-S and DVB-T system used world wide are described in detail. In the chapter 3, Stat-Mux and Code-Compress in Mux Device has been introduced, and how to reality in some device. In the forth chapter, ASI matrix digital video Head-End signal attempters and IP/MPEG router switch tech. which sound the trend of the future. In the fifth chapter, analyze the TV technology and IP net technology will be combined in DVB over IP. At last, new digital head-End structure has been introduced, and use this to design large and stability digital video Head-End. |
PDF Full Text Request