Quote:
Originally Posted by FranceBB
Not necessarily. If someone doesn't care about playback compatibility, when using a reverse upscale filter, the idea would be to reverse upscale the luma inverting the kernel (i.e Debilinear, Debicubic etc) to the original resolution but leaving the chroma as it is, which means that you're gonna end up with a FULL HD 4:4:4 10bit file from an upscaled UHD 4:2:0 10bit which is a win win.
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It would be VERY unusual content for there to be a visible difference between downscaling to 4:4:4 or 4:2:0. Something like very sharp red text on a blue background or something. I don't believe I've seen actual TV/movie content where 4:2:0 at 1080p and above wasn't adequate.
Screen recordings, sure. Turn off ClearType before doing screen recordings, people! It messes up the chroma for people with different types of panels.