Originally Posted by rmongiovi
What do you mean by "RGB 4:4:4"? RGB has the chroma built in, so it really isn't 4:4:4 or 4:2:2. You can only do that in YCbCr.
However, I am seeing huge differences in the color luminance, hue, and saturation depending on whether I send the TV RGB or YCbCR (either 4:2:2 or 4:4:4).
With YCbCr you can cope with the non-functional luminance controls because all the colors are either too bright or too dim so the global color control can be used to get close to the correct luminance.
With RGB, however, red and blue are too bright and green is much too dim. So a single global control can't be used to fix the color.
Since there are big differences between RGB and YCbCr, a calibration for one kind of input would not be applicable to the other.
This is what I was afraid of, and making it impossible to really calibrate the TV to reference. Without the working luminance controls the CMS is busted.
RGB 4:4:4 just means full color (no subsampling) with separated RGB channels. Granted there is two different luminance ranges for RGB. I didn't make up the definition
I'm just using what was already defined. Don't kill the messenger
I too am seeing blue having way too much luminance with my RGB feed (almost +30%). There is no way to compensate for it. My green error isn't as bad as you describe, but it's there.
What size/type of patterns are you using for color calibration? I've tried small,media,large windows and APL versions. As well both 75% and 100%. Even with small windows I couldn't find any linearity measuring 75% and 100%; saturation wasn't consistent. Each one gave me different results
Which makes me think the TV will not track well from 0 to 100%.
Anyone know if there is a CMS fix in the works?Edited by SiGGy - 6/11/12 at 6:51am