What is 4:2:0 YCbCr? I thought 4:2:2 is for every 4 Y values, 2 Cb and Cr values are stored. What is 0 then?
In the 4:2:2 scheme The Cb and Cr components are stored for every row and on every other column, while for the 4:2:0 scheme the Cb and Cr components are stored for every other row AND column. In general in, X:Y:Z X represents the number of Y samples in first row, Y represents number of chroma samples in first row and Z represents the number of samples in second row
The slide that describes this is here in the lecture on color.