在国外,一种新型的数字式彩色电视机正在进入家庭。目前,美国、日本、联邦德国、英国和荷兰等国都在积极发展数字式彩色电视机。作为世界最大潜在电视机市场的我国,第一台数字式彩色电视机已由华南工学院研制成功。我们知道,现行的电视制式中,视频信号是连续变化的模拟信号,这种制式存在清晰度不高和重影等,虽经努力,仍难以进一步提高电视的性能,而数字式彩色电视机就可解决这些问题。数字式彩色电视机的主要标志就是以数字电路代替模拟电路,使那些 Abroad, a new type of digital color TV is entering the home. At present, the United States, Japan, the Federal Republic of Germany, Britain and the Netherlands and other countries are actively developing digital color TV sets. As the world’s largest potential television market in China, the first digital color TV has been successfully developed by South China Institute of Technology. We know that in the current television system, the video signal is a continuously changing analog signal. This system has low definition and ghosting. Although it is still hard to further improve the performance of the television, the digital color TV Can solve these problems. Digital color TV is the main symbol of digital circuits instead of analog circuits, so that those