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由于现行电视的清晰度不高、观看视角狭窄、画面尺寸不大,画面宽高比不合理和制式不统一等,已很不适应当今信息量日益丰富的需求了。因此,日本NHK(日本广播协会)于1970年首先提出了一种称之为“高品位电视”的概念,松下、东芝、三菱等公司也着手设计和研制与之相适应的高分辨率彩色显象管。接着,各国科学家相继作出了努力,终于在1985年3月～9月期间在日本筑波举办的国际科学博览会上成地演示了高清晰度电视——HDTV(High DefinnitionTV),达到了实用化的程度,并将于1990年开辟卫星节目广播,以实现HDTV商业化。
Due to the lack of definition of the current television, narrow viewing angle, the screen size is not large, the screen is unreasonable aspect ratio and the standard is not uniform, it is not suited to today’s increasingly rich information needs. Therefore, Japan NHK (Japan Broadcasting Association) first proposed a concept called “high-grade TV” in 1970. Companies such as Panasonic, Toshiba and Mitsubishi also started to design and develop high-resolution color display Like tube. Then, scientists from all over the world made efforts in succession and finally demonstrated the high definition television (HDTV) (High DefinnitionTV) at the International Science Fair held in Tsukuba, Japan from March to September 1985, reaching a practical level And will start broadcasting satellite programs in 1990 in order to commercialize HDTV.