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(need a explanation)NTSC Progressive (525p/60Hz)

Discussion in 'TVs' started by alfonze-1, Sep 2, 2004.

  1. alfonze-1

    alfonze-1
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    Can someone explain what is ment by NTSC Progressive (525p/60Hz)?


    Thanks
     
  2. Rob20

    Rob20
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    It means that the picture is made up of a frame consisting of 525 lines, refreshed at a rate of 60 frames per second, (60hz). Ordinarily a tv picture is constructed by seperating a frame into two fields of odd lines and even lines. In this way 30 frames are then shown. The odd lines are drawn first, then the even to construct the frame. However, this method usually ends up in a flicker that is perceivable by the eye. A progressive picture constructs the whole frame in one go. odd, even, odd, even etc.. to the bottom of the frame providing a more stable picture. In this way 60 frames are now shown doubling the frame rate. I guess this is enabled by repeating each frame twice.
     

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