DisplayLink Forum - YCbCr color coding

Quote:

Originally Posted by saintfrenz (Post 85115)

Ah I see. So "HDMI Black Level" actually refers to the RGB range?

Yes, I already told you this in my very first reply, see:

Quote:

Originally Posted by qp6019352 (Post 85037)

On Samsung TVs, the option is usually called "HDMI Black Level", which can be set to "Low" or "Normal".

Quote:

Originally Posted by qp6019352 (Post 85037)

If so, how is the mapping? HDMI Black Level "Low" is RGB 16-135 Limited Range I presume?

Yes, I think so. But as you said, you can easily see this anyway:

0-255 source on 0-255 display = all fine
0-255 source on 16-235 display = clipped black detail (i.e. details are missing) and crushed colors
16-235 source on 16-235 display = all fine
16-235 source on 0-255 display = black looks gray and everything looks washed out and bleached

Quote:

Originally Posted by qp6019352 (Post 85037)

BTW, the TV does allow switching HDMI Black Levels even when in PC mode

Okay, but anyway, you should note that:

PCs always render at 0-255 RGB internally natively. Windows always renders in 0-255. Even when you switch your graphics driver to 16-235, it will simply compress 0-255 into 16-235 instead of really rendering at 16-235. So, it's always best to output at Full Range RGB (0-255) with a PC, since that is what it is natively rendering in. So, the display should also be configured to 0-255. Also, please note that PCs always render natively in 4:4:4. RGB is always 4:4:4 (full chroma and luma resolution).

16-235 is used for video content, i.e. for Blu-ray Disc, HDTV and so on. Video content usually is YCbCr, not RGB. And YCbCr is always 16-235. Besides, most video content is 4:2:0, not 4:4:4, i.e. you only get 960x540 color (chroma) resolution on a 1080p video/movie for example.

;)