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How can DVD (540 lines) play on Plasma (480) lines????

Discussion in 'Plasma TVs' started by dnesdlrow, Aug 17, 2004.

  1. dnesdlrow

    dnesdlrow
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    Hi everyone, this is my first post :hiya: , sorry it has to be a dumb one. Please excuse my ignorance! I am looking to buy a plasma tv but am a little puzzled. If a DVD picture that has 540 lines(is that right?) is shown on a tv with only 480 pixels vertically, how can all the information be shown? 540 into 480 just don't go!!! HELP!
    I'm sure there's an obvious answer.
    I have been steering clear of plasmas with a resolution of 860x480 because of this even though some of them (Panasonic mainly) seem to get great write ups. Am I wrong to do this, what's the advantage of more pixels...HD TV maybe..
    I'd appreciate any help thanks :lease: . Great forum by the way..
     
  2. johndon

    johndon
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    The plasma will downscale the image to display on 480 lines so you do lose some information. Whether you actually notice the loss is a different matter.

    All plasmas will scale either up or down or even horizontally if the input image resolution does not match the native resolution of the panel.

    HTH

    John
     
  3. Gordon @ Convergent AV

    Gordon @ Convergent AV
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    Also you may want to know that Region 1 dvd's are 480horizontal lines of resolution.....hence the 852 x 480 res panels. Region2 discs are 576 horizontal lines and would need down scaling.

    Gordon
     
  4. Dutch

    Dutch
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    dnesdlrow,

    The 540 lines you refer to is the horizontal resolution of DVD which is the number of vertical black and white stripes that can, in theory, be resolved. As Gordon says, the 480 and 576 lines referred to are the number of visible horizontal scan lines in the NTSC and PAL broadcast systems. Hope this helps.

    Steve
     
  5. dnesdlrow

    dnesdlrow
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    Thanks Guys,

    That makes sense. What about High Definition TV? I presume the display would need to have many more horizontal lines to benefit fully.
    And while I'm on the subject of HDTV, is it really worth shopping around to find a HDTV compatible screen? And how do I know if a screen is compatible? What connections will it use, HDMI, DVI????
    Once again excuse the lack of knowledge, but with you guys around shouldn't be long before I'm a guru!! :D
    Don.
     
  6. Reiner

    Reiner
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    HDTV is not defined as one resolution, so it could be e.g. 480, 720 or 1080 (1920x1080 is AFAIK the highest currently defined for HDTV). So far mostly LCDs offer this resolution but also some plasmas do:

    http://www.planetdtv.com/SPECIALS/NEWS.htm

    But of course those high-def displays are expensive. Very expensive:

    http://fox.rollins.edu/~tlairson/asiabus/samsung.html

    If 1920x1080 isn't enough maybe you can choose one of those:

    http://www.apple.com/displays/specs.html ;)

    As to the connection: I rekon DVI and/or HDMI will be the preferred choice.

    I read that two Taiwanese manufacturers of LCD screens predict that plasmas will be replaced by LCDs or other new technologies (LCOS?) in the very near future.
     
  7. DrPoko

    DrPoko
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    Has anyone ever planned to bring out a native PAL plasma (1024x576).
    I guess it is question of market size PAL v NTSC.
    TI though it was worth while bringing out a PAL res DPL chipset (Matterhorn) for front projectors.
    Guess DMDs have a much lower development & tooling costs.

    Will PAL just slip into obscurity once HD finally arrives to Europe and we will just adopt the same standards as the US (720p/1080i)
     
  8. Rob20

    Rob20
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    It would be nice to think that manufacturers could use the move to a hi-def picture to finally provide a worldwide standard for tv screen resolution/frame rate.
     

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