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1995年11月30日,中央电视台通过中星5号卫星C波段转发器向全国传送电影、体育、文艺和综合(农业、军事、少儿、科技)四个频道的卫星电视节目,以后又增加了戏曲音乐频道的节目。上述五套节目又在亚洲2号卫星Ku波段转发器上并行播出。数字卫星电视节目的成功传送,是我国广播电视事业的一件大事。下面主要介绍数字压缩频道的方案和数字压缩频道的工作原理及Ku雨致衰减问题。
On November 30, 1995, China Central Television transmitted satellite television programs of four channels including film, sports, art and synthesis (agriculture, military, children’s, science and technology) through China Satellite No. 5 C-band transponder and later added Drama music channel show. The above five programs are broadcast in parallel on the Asian No. 2 satellite Ku-band transponder. The successful delivery of digital satellite television programs is a major event in China’s radio and television industry. The following describes the digital compression scheme and digital compression channel works and Ku rain caused attenuation.