Discussion in 'Projectors, Screens & Video Processors' started by NicolasB, Apr 5, 2005.
Subject line is hopefully self-explanatory.
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.
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"?
All i know is it makes my Fujitsu 50XHA40es look even better than it does naked...
Chroma upsampling error correction
Interlaced chroma problem correction
Audio delay compensation
VCR timing stability control
But apart from that............
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.....
A few more;
Comb filtering/ Y/C sepperation
RGB gain and offset adjustment
Chroma delay correction
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?
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
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
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).
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?
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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