Upcoming limited/full range switch needs to also include a RGB/YCbCr switch for TVs as well #2307
Description
To explain why this is needed, the old TV I am testing here (currently with an Intel desktop) I have observed:
RGB Full- Bad black crush, grey colour distortion
RGB Limited- No crush, grey colour distortion (different black level blocks acquire tints, gradient has bands)
YCbCr Limited- No crush, correct colours
YCbCr Full- No crush, correct colours
There is probably a subtle difference between full and limited in YCbCr, but it looks fine according to the gradient test pattern and the black levels test of blocks from 0 to 25. Chroma 4:4:4 is present (I have a test pattern for that too). So this TV needs YCbCr beyond a shadow of doubt. Setting RGB limited isn't enough because there is colour distortion. It isn't processing RGB properly when set to native 1:1 pixel resolution. When downscaling RGB from a higher resolution it does correct the colour distortion, but using the TV's scaler chip will introduce latency and possible other issues and not be a crisp 1:1 sharpness.
I would suggest just as the night mode feature has a set of blocks to look at when toggled to advanced, this could do the same thing.. have a row of blocks and a row of gradient and this way people can easily see what happens to the appearance of them when toggling the switches on and off.