Towards Better Chroma Subsampling - SMPTE Presentation Notes
Slide: 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21

A look at a possible (though unlikely?) future: chroma done really well

Original.	Typical chroma subsampling.	With linear light processing and in-range reconstruction (spill method).

• You can see the difference for yourself between the current approach to chroma subsampling and what is theoretically possible (though perhaps impractical- I do not know).
  
  
• 4X subsampling is a little too much to be visually perfect/lossless.