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Colour spaces, picture quality - Nvidia cards

 
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Colour spaces, picture quality - Nvidia cards
Pob
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#1
2009-10-18, 01:08 AM
Having installed the latest Nvidia drivers, I am struggling to get the picture quality as good as it was before installing themSad I wondered what settings others use, as I want to make sure they are correct before I start calibrating the TV.
Previously I had my 8800GT outputting YCbCr444 to my Toshiba XV37 LCD - and all other options left at 'video player settings'- picture was fine.
But with the latest driver the same setting resulted in a muddy looking picture. The best I have managed to get is by setting the desktop to RGB, and in video settings selecting the dynamic range to limited (16-235). Although I have read a lot about colour spaces, black crush, whiter-than-white etc it just gives me a headache! At about the same time as installing the new drivers I also switched to PowerDVD decoder for my H264 TV, and using DXVA which means all colour / brightness changes have to be done in the Nvidia control panel. Also confuses things because I believe PDVD expands all video to 0-255, assuming I guess that everyone uses a monitor and not a TV.
So what is proper - RGB or YCbCr444, 0-255 dynamic range or 16-235?
Lounge media center; Asus UEFI mobo-Intel Core i5-GeForce GTX970-Samsung EVO SSD 256gb-2x Samsung F1 1tb-NovaT USB-Nova HDS2-Samsung 51" plasma
stustunz
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#2
2009-11-09, 06:46 AM
hey pob what driver version are you using
what are your tickers and panning like
i did a dumb thing and changed to the latest driver and they are shit
JonnyCam
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#3
2009-11-09, 07:53 AM
Quote: and they are shit

So, thats your review then? Big Grin
I won't bother up(?)grading.

What OS are you using with the new drivers?
"Shut up brain, or I'll stab you with a Q-Tip!"

--= Win7, C2D 2.93 GHz, ASUS 9400GT Silent, 2GB Ram, Few HDD's, 3TB unRAID server, Samsung 50" 1080p Plasma via HDMI, 40" 1080i LCD via VGA =-- * PVR2000 Analog PCI / Avermedia DVB-S PCI / Hauppauge 2200 DVB/Analog * PCH GBPVR Client * *BD-E6500 w/ NPVR client*
stustunz
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#4
2009-11-09, 08:15 AM
i have a nvidia8600 nvidia 9400
both on Xp
tried W7 over weekend but hated that also im sounding like a angry little man really

191.03 also tried 191.07
ive had this jumpy ghost thing going on tickers are jumpy as
thought it was the digital thing since i have to have it set to 60hz dumb samsung tv doesnt accept 50Hz on hdmi

curious to see what drivers others are using

still way better than any ati card Smile
Pob
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Posts: 677
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#5
2009-11-09, 10:47 PM
stustunz Wrote:hey pob what driver version are you using
what are your tickers and panning like
i did a dumb thing and changed to the latest driver and they are shit

I agree about the latest drivers - I started getting reboots without any error messages, even though 'Automatically restart' on system failure is not checked in system properties. I did some reading on the Nvidia forums and many users said they keep having to go back to the 'last stable version', 185.85, so I installed this version on both XP and Windows 7 and have not had a problem since. However in either version I never noticed any problems with tickers or panning - they were always fine. I do switch between 50Hz and 60Hz refresh rate though depending on the content - 50 for TV& recordings & DVD, 60 for any American content in MKV's, AVI's etc. I tried using 24Hz for Blue-ray and MKV, but for some reason it causes bad judders, and 60Hz seems better which is weird because I thought BD and MKV's were 24fps natively - maybe it's the PowerDVD decoders...
Funny thing in 185.85 though - using 'video decoder settings' for colour range does result in the 16-235 colourspace, the reverse of the latest 19x Nvidia drivers where it resulted in 0-255. I have started to get used to 16-235, it gives less contrast than full RGB but I think it looks more natural. Another thing I noticed is that all the decoders that work with DXVA (PowerDVD in XP, Microsoft DTV decoder in Windows 7) seem to give a softer image than decoders using only software decoding - I have had to crank up edge enhancement to a crazy 57% in the Nvidia drivers to get it looking sharp enough...
Lounge media center; Asus UEFI mobo-Intel Core i5-GeForce GTX970-Samsung EVO SSD 256gb-2x Samsung F1 1tb-NovaT USB-Nova HDS2-Samsung 51" plasma
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