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> the general case, to convert colors from one colorspace to another without information loss.

Even in the general case that's not true for new televisions: These typically convert from a smaller space to a large one, which can be done 100% losslessly and accurately as intended.

This is quite common, because as TV panel capabilities have largely outstripped the distribution and encoding standards. For example, Rec.709 (the HD standard) is smaller than what any modern 4K TV can display.

The 4K Rec.2020 standard is huge, but it only exceeds typical panel capabilities along the green axis. This may seem like conversion would be lossy, but if you look carefully at video metadata, it ofen specifies that the "content gamut" is smaller. That is, most modern 4K HDR content is mastered on a display that "merely" has a gamut like Display P3, so that's all you need to reproduce it 1:1.

None of this is done by Samsung. They always stretch colours up to the maximum capability of the panel. These days, that's very close to the full Rec.2020 gamut and looks downright garish. Even if "AI enhanced" or whatever, it's wrong. Colours are distorted and nowhere near the original intent.




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