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一、“变频”彩电众所周知,普通模拟彩电的播放速度是50 Hz,即1s(秒)钟播放50个画面,而人眼的视觉临界点在50～60Hz之间,也就是说,播放速度要达到1s(秒)钟60个画面以上,人眼才察觉不出画面的间断性,即闪烁。普通模拟彩电存在大面积闪烁、扫描行间闪烁和行结构线明显等三大缺点。为了克服模拟彩电的上述缺点,则出现了“变频100 Hz”、“逐行扫描”等“变频”数字处理彩电。
First, the “variable frequency” color TV As we all know, ordinary analog color TV playback speed is 50 Hz, that is, 1s (seconds) 50 broadcast screen, and the human visual critical point between 50 ~ 60Hz, that is, play speed To 1s (seconds) 60 minutes above the clock, the human eye can not detect the discontinuity of the screen, that is, flashing. Ordinary analog color TV there is a large area of flashing, scanning lines between the flash line and obvious three major shortcomings. In order to overcome the above shortcomings of analog color TV, appeared “frequency 100 Hz”, “progressive scan” and other “frequency” digital processing color TV.