论文部分内容阅读
1987年美国联邦通讯委员会决定开始发展高清电视。联邦通讯委员会是美国联邦政府的独立机构,直接向议会负责。为了更高效地推动高清电视的发展,通讯委员会成立了一个高级电视建议委员会来专门研究高清电视可供选择的技术,电器生产厂商也被邀请加入委员会参与决策。一、美国的电视市场美国电视产业的数字化进程是从卫星电视业起步的,由于高功率的数字卫星电视提供的频道多,卫星接收天线也趋向小型化,所以数字卫星电视在美国发展得较为顺利。地面的电视数字化是从1998年开始的,同年11月,美国十大城市的23家电视台开始播放数字高清晰电视节目。按照联邦通讯委员会的地面数字电视开播时间表,设在美国规模最大的4大电视市场(分属NBC、ABe、CBS和FOX四大电视网的电视台)应从1999年5月1日起开播数字电视节目。
In 1987, the Federal Communications Commission decided to start developing high-definition television. The Federal Communications Commission is an independent agency of the United States federal government and is directly responsible to Parliament. In order to promote the development of high-definition television more efficiently, the Communications Commission has established a committee of advanced television recommendations to study high-definition television technologies of choice. Electrical manufacturers are also invited to join the committee to participate in decision-making. First, the US television market The digitization process of the U.S. television industry started from the satellite television industry. Due to the high frequency channels provided by high-power digital satellite television and the miniaturization of satellite receiving antennas, digital satellite television has been developing smoothly in the United States . The terrestrial television digitization began in 1998, and in November of the same year, 23 television stations in the top 10 U.S. cities started to broadcast digital high-definition television programs. According to the Federal Communications Commission’s terrestrial digital TV broadcast schedule, the largest four television markets in the United States (television stations belonging to the four major networks of NBC, ABe, CBS and FOX) should start broadcasting digital television on May 1, 1999 program.