YCC is the native colorspace of NTSC, HDTV and DVD. Selecting RGB output on HDMI means that the conversion from YCC to RGB occurs in the STB.
Selecting YCC means conversion gets delayed until the TV/monitor.
For me, I find YCC output from my Comcast DVR gives me better PQ.
Try watching content with smoothly changing colors or brightness; I found less noise and artifacts with YCC output than with RGB output.
Originally Posted by Don1959
To tell you the truth... I don't really know... I think it has something to do with the colour space used.... any way I use YCbCr and it looks good.... just calibrate using the same as you will watch with......