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HD Screens (Help)!

Discussion in 'General TV Discussions Forum' started by Davey74, Aug 16, 2005.

  1. Davey74

    Davey74
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    Hi

    Can someone please tell myself a complete novice, how i know what HD picture the plasma or LCD screen will receive. All the screens ive seen have been pixel size 1024 x 1024 or 1366 x 768 now if im right that means they cant receive 1080i ??????
     
  2. johndon

    johndon
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    Screen will 'scale' the input to fit the number of pixels available so they can fit 1080 lines on a screen with 768. Some information is, therefore, lost.

    John
     
  3. Stephen Neal

    Stephen Neal
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    Also worth remembering that a 1080i signal doesn't deliver a full 1080 lines of vertical resolution. Because the source is interlaced, it delivers a resolution equivalent to a progressive system using about 800 lines - so a 720 or 768 line display shouldn't lose too much information, and if the 1024 line display is capable of displaying progressively in this format, then there should be no resolution loss (though I think some 1024 plasmas use a form of alternate scanning - a bit like interlacing)

    This is ignoring the difference in horizontal resolution - where 1080i can theoretically carry 1920 horizontal samples, and 720p only carries 1280. If your display has fewer than 1920 pixels horizontally, it may not resolve a 1080i signal fully - though few sources themselves utilise the full 1920 figure.
     

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