Resolution
UHD carries four times as many pixels as HD. That alone says nothing about colour or tonal precision.

Comments on the frame. Decisions with the team.
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Resolution, tonal precision and chroma sampling together determine how much information remains in the picture.
UHD carries four times as many pixels as HD. That alone says nothing about colour or tonal precision.
8, 10 and 12 bit mean 256, 1,024 and 4,096 possible code values per channel.
Luma remains full. The chroma rows show 25, 50 or 100 percent of colour sample positions per component.
The percentages describe sample positions per component, not total quality or bitrate. Material, signal path and playback all matter.

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