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1前言随着国家对于高清电视的长远规划和高清电视技术发展,从2009年开始各电视台争相推出自己的高清同播频道,到目前为止广电总局已经批准了17套高清频道的上星播出。目前,传统的标清卫星数字电视上星节目,除中央电视台CCTV-5、6等少数频道外,大多数省级卫视均采取开放的方式进行传输;而根据广电总局的要求,现阶段的高清频道采用加密的方式上星传输,
1 Introduction With the long-term planning of the country for high-definition television and the development of high-definition television technology, all television stations have been launching their own high definition on-air channels since 2009. SARFT has so far approved 17 high- . At present, most of the satellite TV stations in the standard SDTV satellite programs, except the CCTV-5 and 6 CCTV channels, are open-minded. According to the requirements of the State Administration of Radio, Film and Television, the current HDTV channels Adopt the way of encryption to transmit on the star,