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电视是20世纪人类智慧的结晶。1924年英国人贝尔德最先研制成功机电扫描黑白电视机,并在1925年10月30日首次播放了人的图像,接受实验者是15岁的威廉·泰顿。1929年9月30日贝尔德通过英国广播公司用无线电发射机开始了他的首次电视服务,并于1930年5月上市首批贝尔德电视机。1932年3月22日德国第一座低清晰度(180条扫描线)的电视台开播。1936年11月2日英国伦敦第一家高清晰度(405条扫描线)的电视台开播。仅仅50年的时间,全世界就建成了8250座无线电视台,有5亿户家庭拥有电视机,这也许应证了
Television is the crystallization of human wisdom in the twentieth century. In 1924, Baird, an Englishman, first successfully developed electromechanical scanning of black-and-white television sets and first played the human images on October 30, 1925. The experimenter was William Teton, 15 years old. September 30, 1929 Baird started his first television service using a radio transmitter by the BBC and listed the first Baird televisions in May 1930. March 22, 1932 Germany’s first low definition (180 scan lines) television station broadcast. November 2, 1936 The first high-definition (405 scanning lines) television station in London, England was launched. In just 50 years, 8,250 wireless stations have been built around the world and 500 million households have televisions, which may justify