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我只想说几乎所有牌子都是按照 “PAL = 50Hz , NTSC = 60Hz"来宣传的..............
现学现卖.....
The field rate of an interlaced video image is twice the effective frame rate, since interlacing draws only half of the image (the odd- or even-numbered lines) at a time. For example, a field rate of 60 Hertz will correspond to a 30 frames-per-second moving picture. A field rate can apply to either a video signal, or to a monitor designed to display that signal without conversion.
Theoretically, an interlaced signal could have three or more fields per frame, resulting in a field rate that is a 3x or higher multiple of the frame rate. However no such signal is in common use today.
Progressive scan monitors do not have a field rate (field rate=场帧), however they may still display interlaced video by converting each field into a full frame. In this case, the monitor's frame rate (frame rate=帧频)would then likely match the video signal's field rate. -重点在这里
[ 本帖最后由 圣熊 于 2010-9-17 00:23 编辑 ] |
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