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PROGRESSIVE SCAN
Is a superior way of viewing video images compared with the traditional interlaced method. With interlacing, the two fields of each video frame (the odd and the even horizontal lines) are shown one after the other. With progressive scanning all of the horizontal lines of the frame are displayed in one go. The advantages are a lack of 'flicker' and jagged edges, typical of interlaced displays like CRT TVs, and also smooth horizontal resolution. A number of DVD players can output video progressively, although it is only officially available with NTSC material. The signal must be fed to a non-interlaced display such as a plasma screen, or LCD or DLP projector. Certain TV's also feature progressive scan (or deinterlacing). Such sets analyze the video signal and insert extra scanning lines to increase the apparent resolution (compare with 100Hz scanning).
ALSO SEE: LIQUID CRYSTAL DISPLAY, DEINTERLACE

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