Interpolation

x disturb the context, content : challenge

human vision system can not realize even though the high frequency has gone. However, if you have a bad interpolation then human can acknowledge it.

 

Upsampling, but cannot distinguish the performance drop

 

Only Interpolation, not AI

 

you have to determine what artifacts mean

 

2x2 matrix 4 intensity values at cr and cb.

how much you downsampling the cr than y.

cr: we can hide things

 

ex. 4:2:0 chroma

walk cross the row: 2 colors

walk cross the column : 0 colors.