HDTV是High—Definifion Television(高清晰度电视)的简称。 CCIR对HDTV所下的定义是:“观看距离约为屏面高度的三倍时,该系统能使显像效果实际上等于或接近于由视力正常的观众观看原始景物或表演时取得的印像。”换一种说法,HDTV用于电视广播时,具有接近35mm宽银幕电影首轮放映的效果。而现行彩电的效果仅相当于16mm电影。 具体来说,HDTV在技术上将 HDTV is short for High-Definifion Television (High Definition Television). The definition of HDTV by CCIR is: “When the viewing distance is about three times the screen height, the system enables the imaging effect to be substantially equal to or close to the impression obtained by the normal-looking audience when viewing the original scene or performance ”Put another way, HDTV is used in television broadcasts and has the effect of a first-run projection close to a 35mm widescreen movie. The effect of the current color TV is equivalent to only 16mm movie. Specifically, HDTV is technically