美国１５７６家电视台中的４６家电视台，本月内在洛杉矶等２３个大城市正式播出数字式电视节目，其中有２３家已从１日开始在十个城市播出高清晰度电视节目。专家们认为，这标志着新的电视时代的开始，其影响将超出电视工业本身。利用普通的模拟式电视机加一个数字信号转... The 46 television stations of 1576 television stations in the United States officially broadcast digital television programs in 23 major cities such as Los Angeles this month. Of these, 23 have already started broadcasting high-definition television programs in 10 cities from the 1st. Experts believe that this marks the beginning of a new era of television, and its impact will exceed the television industry itself. Use an ordinary analog TV to add a digital signal to...