DVB-S2是第二代卫星数字电视广播标准，其性能如此优异的一个重要原因就是采用了LDPC码方案。
Research results show that LDPC code's performance is better than Turbo code, and more approaching the Shannon limit. DVB-S2 is the next generation standard of the digital satellite broadcasting.
数字电视广播主要通过卫星、有线及地面三种传输方式实现。
Digital television broadcasting has three main types: terrestrial, satellite, and cable-based digital TV.
从数字电视广播的首次实现入手，介绍了机上变换器在卫星直播和CAT V中的应用。
Starting from the first implementation of digital TV broadcasting, the applications of set top converters in DBS and CATV are described in this paper.
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