| In recent years, with the development of digital television technology, more and moreTV program production upgrade from Standard definition to High definition. The HarbinTV station starts its production and broadcast for HD upgrade at the same time, also on thelive broadcast equipment has put forward higher requirements, so that a live broadcast vandesign and the equipment is to produce. I participate in design and equipment selection, fullparticipation in the testing of various system integration and debugging.This design mainly completed the following several aspects: the current broadcastequipment status and demand analysis, in view of the current existing problem andcombined with the actual demand, we put forward the live broadcast van with both HD/SDMicrowave and Satellite transmission modes. According to the existing equipment and thefuture demand of equipment, put forward higher compatibility and expansibility. Completedthe overall structure design of the system by comparing the mainstream equipment, andbased on each of the major system design. According to the live broadcast needs to designthe live broadcast of microwave and satellite transmission systems. The microwavetransmission system based on COFMD technology, it can solve the problems encountered inthe live broadcast. Through the calculation of satellite uplink power to determine a suitablepower amplifier used to live, and the effect of cost optimization. The automatic satellitesearching system would reduces the preparation time. Finally in the broadcasting standardsbased on the system test, the video and audio systems are reasonable and reliable, as well asthe transmission system.The live broadcast van after nearly a year of actual use, has undergone many liveevents, and complete the task very well. Although exposed some problems andshortcomings, but it is still a good way to meet the design requirements, and to other TVstations for such equipment design, test and implementation has a certain significance.. |
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