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CRT and resolutions

Discussion in 'Projectors, Screens & Video Processors' started by artoj, Dec 8, 2004.

  1. artoj

    artoj
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    If I watch a 4:3 aspect ratio PAL picture should I use a "lineresolution
    of the same ratio" f.ex. 1152 : 864, which is 1.333 or 1080 : 864, which is 1.25, same as PAL 720 : 576. Or for a NTSC 4:3 should I go for 960 : 720 (=1.333) or 1080 : 720 (= 1.5 = 720 :480)

    Or do you think that a "lineresolution" of a CRT doesn´t benefit at all if or not it is either of above, or a multiple of 1.333 or 1.25/1.5.

    All above asuming that you end up using a "lineresolution" inside of the projectors specs.
     
  2. Roland @ B4

    Roland @ B4
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    The horizontal resolution will have very little effect on the picture provided your scaller/ PC is up to the job.

    If you don't believe me try 640 then 1600. Any improvement will come in how your video processor behaves rather than the projector.
     
  3. artoj

    artoj
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    Thanks for the words of wisdom, Roland. :lesson:

    But there is still the question of "the right" vertical resolution.

    For PAL, should that be a some sort of multiple of 576, for ex. 864 or 1152 or just something else that seems be working OK for that particular projector.

    In my case the projector is Barco D 808 S, used "gently" about 4500 hours.

    So far I have used 1440 x 864@75 Hz for both PAL/NTSC and 4:3/16:9 but I´m curious if I should try something else ?
     
  4. Vince M

    Vince M
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    What projector is it & what scaler?
     
  5. Vince M

    Vince M
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    Sorry ..just seen its an 808s,,what scaler?
     
  6. Vince M

    Vince M
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    ..If your going via p.c. what I have found looks nice for 16:9 is 1366 x 768 @ 72Hz.
     
  7. artoj

    artoj
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    I´m using PC: P4, 512 Mb, 9600 XT, TT 2.05 etc.

    "16:9 is 1366 x 768 @ 72Hz" If I´m right this is specially for NTSC disc, right ? Should I use for PAL same resolutions @ 75 Hz.

    For a 4:3 disc should I gain anything for using a higher vertical resolution ?
     
  8. Vince M

    Vince M
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    I used it for PAL & NTSC and thought It a great res. for both.
     
  9. Roland @ B4

    Roland @ B4
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    770 ish, is about the maximum number of lines you will reslove in 16x9. If you are keeping the same width but increasing the height for your 4x3 material then you may be able to push to higher resoloutions like 1024. But most 4x3 material is of an inferior quality any how.

    If I was you, I would keep the resolotions the same at around 720 lines (higher is quite hard work to keep tuned) then flip between 72 (ntsc) and 75 (pal).
    Set up one frequency on input 5 and one on input 4 or you may find that they use the same memory block.
     
  10. artoj

    artoj
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  11. Vince M

    Vince M
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    Artoj,
    You were on the right track re;-4:3 ,variable of 1.25 for PAL & 1.5 for NTSC,Try a few and see what looks best,also depends on how many memories you want to set up..you could have one for Anamorphic,16:9 PAL,16:9 NTSC,4:3 PAL,4:3 NTSC.
    Remember also you can over egg the mix bu going too high..As mentioned in another thread you have 480 lines for NTSC & 576 lines for PAL resolution.
     

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