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Old 05-12-2008, 12:37 PM
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bialio bialio is offline
Join Date: May 2007
Location: Frisco, TX
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Level expansion matching SD and HD

It seems to be an accepted fact on the avsforum that both ATI and nVidia drivers do level expansion (16-235)->(0-255) for HD video.

On my client HD looks good - proper levels seem to be going on. So I must assume that the TV connected to the client is in "receiving expanded levels" mode.

I have noticed that SD is often washed out. I'm starting to think that this is because the SD video is NOT getting expanded. Is that a reasonable conclusion? What should one do if that is the case?

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Old 05-12-2008, 02:27 PM
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stanger89 stanger89 is offline
Join Date: May 2003
Location: Marion, IA
Posts: 15,188
If it's an ATI card, then there's a registry setting to force expansion of SD. If it's nVidia, I'm not sure what to tell ya, I've never heard of nVidia treating HD and SD differently.
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Old 05-13-2008, 04:20 AM
Polypro Polypro is offline
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Join Date: Jun 2005
Posts: 1,804
With Nvidia 169.25, everything works fine for me. If I load the 174 beta drivers, PDVD is fine, but Sage is *over*expanded....bringing Sage back down to 16-235 crushes PDVD. I think it's a problem between EVR(PDVD) and VMR(Sage). Hopefully Nvidia can fix it, or Sage can go EVR.

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