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Originally Posted by bozydar
Well in reality you lose almost nothing. On Xbox and PS3 almost all “high end graphics” games render at 720p or even lower resolution and upconvert graphics to output resolution. This has much greater impact on quality than 4:2:2 processing. Even if some games use FULL-HD resolution they do not render enough information to show difference between 4:4:4 and 4:2:2 (low resolution textures, anti-aliased edges, even procedural texturing cannot run at full res, because of the aliasing).
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There will surely be no big loss in the moving parts of the image. However, games often have static areas (score etc) with colored sharp edges, and there 4:4:4 vs. 4:2:2 should make a difference.
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Originally Posted by bozydar
Only PC-users using they TVs as main monitors will see difference between 4:4:4 and 4:2:2 and only in really bad cases (like red text on black background).
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I think you are underestimating the impact of downscaling chroma. Sure, in photos, video etc the difference is very small. But in computer type graphics (colored lines with 1 pixel width) chroma subsampling can have a noticeable blur effect. E.g. if I just look at my browser right now, the forum URL links at the top of the page are light brown on light grey with a 1 pixel wide font. I'm quite sure that these links would look blurred with 4:2:2, because the brown color would leak into the grey background.
Edit: I've just checked. See here:
http://www.beststuff.com/audiovideo/...ideo-home.html
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True to its professional heritage, Realta offers complete input to output 4:4:4 color processing and a full 10-bit or better internal data path
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http://www.digitalconnection.com/pro...eo/vps3300.asp
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True 10bit 4:4:4 broadcast grade processing delivering the worlds most advanced and flexible processor.
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So both Gennum VXP and Realta are doing full 4:4:4 processing.