3 ms·
What’s 4:1:1? What people call 4:2:0 is actually 4 pixels of Y and 1 each of Cb and Cr.
by cvwright 5y ago
What’s 4:1:1? What people call 4:2:0 is actually 4 pixels of Y and 1 each of Cb and Cr.
- cornstalks 5y agoWikipedia has a decent article with visuals: https://en.wikipedia.org/wiki/Chroma_subsampling#Sampling_systems_and_ratios https://en.wikipedia.org/wiki/Chroma_subsampling#Sampling_sy... The difference between 4:1:1 and 4:2:0 is that in 4:1:1 the chroma covers a 1x4 line of pixels whereas in 4:2:0 the chroma covers a 2x2 square of pixels.
- cvwright 5y agoTIL. Thanks!