随着数字技术、网络技术的发展,数字电视已成为现代社会信息化的重要标志。世界各国都加快了数字电视的发展步伐。我国政府也高度重视广播影视数字化工作,把它列入了国家中长期科技发展规划。温家宝、李长春、刘云山、曾培炎、陈至立等中央领导多次要求加快广播电视数字化进程, With the development of digital technology and network technology, digital television has become an important symbol of modern society. All countries in the world have accelerated the pace of development of digital television. The Chinese government also attaches great importance to the digitization of radio, film and television and listed it in the medium and long-term science and technology development plan of the country. Central leaders like Wen Jiabao, Li Changchun, Liu Yunshan, Zeng Peiyan, and Chen Zhili repeatedly called for speeding up the digitization of radio and television programs,