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What do scalers do apart from scaling and deinterlacing?

Discussion in 'Projectors, Screens & Video Processors' started by NicolasB, Apr 5, 2005.

  1. NicolasB

    NicolasB
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    Subject line is hopefully self-explanatory. :)
     
  2. Gordon @ Convergent AV

    Gordon @ Convergent AV
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    So, "What have the scalers ever done for us?" in a John Cleese voice.

    Scalers take in a signal of one type at a given resolution and refresh rate and stick it out in the same or another format at a different resolution or refresh rate. How they do that and what other features they may or may not have is what differentiates each one. I've almost finished writing a little article for my website that gives some more info on this. Expect to see it soon.

    Gordon
     
  3. NicolasB

    NicolasB
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    Okay, so that's Frame Rate Conversion to add to the list (e.g. 50Hz to 60Hz), and I guess also "Signal Format" or "Colourspace" Conversion - e.g. digital to analogue, component to RGB, S-Video to VGA, etc.

    While we're waiting for the article, is there anything else that can't reasonably be described as either of those two things, or as "scaling", or as "deinterlacing"?
     
  4. Gordon @ Convergent AV

    Gordon @ Convergent AV
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    video swtiching
    Noise reduction
    Image sharpening
    jaggie filtering
    tea making
    headache inducing.....

    Gordon
     
  5. dilsher

    dilsher
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    "tea making
    headache inducing....."

    roflmmao@Gordon "Gecko".....!!!!

    All i know is it makes my Fujitsu 50XHA40es look even better than it does naked...


    Dil
     
  6. Welwynnick

    Welwynnick
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    Chroma upsampling error correction
    Interlaced chroma problem correction
    Audio delay compensation
    VCR timing stability control
    But apart from that............
     
  7. Gordon @ Convergent AV

    Gordon @ Convergent AV
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    Gamma and greyscale adjustment.....
    Some other stuff that I've not remembered yet and some I have but don't want to tell you about yet.....

    G
     
  8. Carl Ed

    Carl Ed
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    A few more;

    Comb filtering/ Y/C sepperation
    RGB gain and offset adjustment
    Chroma delay correction
     
  9. alpina

    alpina
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    so do scalers need to be adjusted by professionals or are the simply plug and play?

    have never seen scalers for sale in australia. do set top boxes do some of the functions of scalers?

    regards,

    julie
     
  10. hornydragon

    hornydragon
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    Julie scalers tend to be installed by Professionals and Talented amatuers, you can Plug and play but wont get the full impact without knowing the system very well source scaler display etc but you can plug and go if you want I am sure that DVDO and Lumagen will have distribution in your area Crystalio and the german one whos brand name i have forgotten cinema something may do too see wwwDVDO.com for more info
     
  11. glenncol

    glenncol
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    Guys

    I am about to buy the ISCAN HD+ for the above unit as i have played with this unit on another display and found it fantastic for the $

    Any issues you have come across with the Fujitsu getting 1 ot 1

    And other suggestions that you guys have tried with great success?

    Oh i am in Oz
     
  12. Liam @ Prog AV

    Liam @ Prog AV
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    1:1 is relatively easy at 60Hz (default VESA timings for 1360 x 768) but you won't be able to get native 50Hz. Most are fine with 60Hz conversion but if it really bothers you do a memory (do iScans have memories like the Lumagen?) for 720p @ 50Hz. If you do this though you will also need to use two memories on the plasma screen for 50 and 60Hz inputs (it quite annoyingly forgets you had it in fine mode when you switch from native to 720p).
     
  13. glenncol

    glenncol
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    Damn we have had issues with 60Hz in the past causing motion judder and dont want ot go through that again.

    Where does the fault sit with the panel or the DVDO ? is it somethat that can be requested of DVDO to fix?

    What is the over all best scaler for 50hz as far as you guys are concerened?
     
  14. Liam @ Prog AV

    Liam @ Prog AV
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    Not a fault per se, the Fuji like just about every other plasma screen in the world cannot accept native resolution, digitally, at 50Hz. Will need 720p or XGA stretched (no vertical scaling, just horizontal). You can get an image at 50Hz but it's not pixel matched once you bring up test patterns, 720p is better.

    I do prefer the Lumagens though, where in this case you could have 3 or 4 memories assigned to various non-native resolutions that can be brought up at the touch of a button (or even automatically based on input resolution, or a certain output resolution always for a certain input etc). Lumagen DVI is still £695 for a few more weeks.
     

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