View Full Version : Scaler to correct image size
tom in LA 05-21-08, 11:35 AM I have AG90 that is used for HD-DVD, BLUray, regular DVD player and I an having a problem with the different images fitting on the screen. I use to run through an older processor (ROCK +) but with HD technology I go from player to the CRT projector with a mome hdmi card. The images fit different depending on the source and I think I need a scaler for image sizing more than processing. I am very happy with the image, but is off center and doesn't fit the screen. I don't want to recalibrate the projector ( I'm not an expert but can get a very acceptable picture ). I welcome any sugestions for a scaler, new or used to correct the sizing issue. I guess using a hdmi -mome cable forces me to get an expensive scaler?:confused:
tom in LA 05-22-08, 08:02 PM No help. yet. I'll try posting on the scaler forum. I just wanted input as to other sony, CRT users use to correct screen fit issues. I thought a scaler was the best solution, but i'm not that knowledgable. Any scaler suggestions? Thanks in advance.
Person99 05-22-08, 08:06 PM Recalibrating the projector is exactly what you need to do.
Each different resolution/refresh uses a different memory block. Each one needs to be set up correctly. A scaler only helps when the resolutions and refresh rates are the same, but the sources send different timings. Even with this, the projector can do it without the scaler.
The reason you should need a scaler is to be able to do 1080p. 720p and 1080i should have pretty visible scan lines on your set up.
Gino AUS 05-22-08, 08:27 PM You will need a scaler to fix the timings to suit your rasters better for each source. Most scalers new or used out there can do this, which one you get would mostly depend on your budget.
CZ Eddie 05-22-08, 09:09 PM Like Person99 said (hi dave), you don't need a scaler. You just need someone to calibrate your projector for you. Which I would spend money on before buying a scaler anyways, because it will provide a much better improvement in image quality than a scaler will.
That being said, you could also use a scaler to achieve your end goal. There are a few choices.
The Lumagen HDP and HDQ do not route audio and they only have DVI output, no HDMI. But they are probably the best for 1080i and 1080P processing and sell for ~$600 to $1000 on the used market, depending on model. There is also a new Lumagen model that sells for ~$3500 which does have HDMI and does route audio. It's called the Radience and if I had the spare cash, it would be my first choice in a scaler.
Then there is the DVDO VP30 and VP50 which route audio and have HDMI 1.1 output. These go for $400-$500 on the used market for the VP30 and I have seen new refurbished VP50's selling for $930 right now. Then there is the VP50pro which has HDMI 1.3 and a bunch of either features. It sells for over $1500 on the used market I believe. These DVDO's have the best 480i processing and they do a good job also on 1080i. Though I don't think the VP30 does any processing? Only the VP50 and VP50pro?
There are other scalers on the market, but these are the only two companies to really concern yourself with. The rest are either garbage or are just outclassed by DVDO and Lumagen. Unless you have mega $$$ in your pocket, then that opens up new options.
cinema mad 05-22-08, 10:20 PM A scaler can be A very powerfull tool in the right hands, it can alow you to have complete(custom)control over your rez timings and is A must to get the most out of A CRT projector IMA. For example: you will be able to adjust front and back porch settings for the desired rez to allow as much raster to be used as safe. If you use the scaler to help center the active picture area on the raster you can reduce drift dramaticly by allowing the projectors adjustments to remain closer to mid point setting especially with RGB shift thus less stress on the projectors electronic's, Not to mention what A high end VP can do for improving SD picture quality.....
tom in LA 05-23-08, 04:47 PM Thanks, again, guys for the great advise. It costs me about $1500 to get the G90 recalibrated. The problem always is that when you change or add a new source players the picture changes and needs a new calibration. With a scaler I ( I think?) can fit the picture, get scaling and get a switcher in the process. I can plug the different sources, dvd, HD-DVD, PS-3 and have one out to the projector. Now I am having to plug and unplug cables HDMI RGB, and sources to use the different sources and the picture sizes are all different. Iknow someone can do it with calibration, but if I change equipment I have to have the person come out and recalibrate. Because I need an HDMI hookup I'm looking at the scalers mentioned. I will go 2:35-1 with a new projector in a few years but, for now think a used DVDO vp50 is the most cost effective for a quick fix. I totally agree that the radiance or vp50 pro is best but $2000+ more. I will wait until I upgrade (change) the projector and screen ( 126" TO 168" ) to chose the best at that time. I had a rock scaler and was very easy to adjust. The G90 is more difficult. Thanks again. You guys have never failed to help!!! Where the heck can you get a used/refurbished VP50 for under $1400??? Tom in LA
CZ Eddie 05-23-08, 05:25 PM Calibration doesn't cost $1500 every time you add a new source. In fact, when adding a new source to an existing calibration, it probably takes just five minutes to get it set up properly.
For a refurbished VP50 under $1k, just do an Internet search and you'll find it. It's against forum rules to post that information here.
tom in LA 05-23-08, 08:34 PM Thanks CZ and others... Its the travel time and booking out a day that runs the cost up of a calibration. I live in Malibu (outside of LA) and would welcome the name of a local calibrator who could help me with this. I always need a touch up but don't know any one locally to work on a G90. Any help is appreciated. I will look on the net. Thanks all!!! Tom in LA
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