START HERE - Pick the Right Kodi Box (updated Dec 2020)
(2018-06-09, 19:49)hdmkv Wrote: Is this why I'm seeing 8-bit 4:2:2 with 23.976 UHD on my PJ? PQ itself looks fantastic w/o any banding or other issues. 
No.
Deep Color (>8-bit) is indicated by the Color Depth (CD field) values in the General Control Packet (GCP) of HDMI signal. CD field values can be set for 8/10/12/16-bit. When they are set to "0", it means 8-bit. YCbCr 4:2:2 by specification doesn't support Deep Color. It has a default 12-bit pixel encoding format. If the actual color depth is less than 12-bit, 0 padding is used to make it 12-bit.

TV/Projector/AVR/many HDMI analyzers simply check the CD field values to report on the color depth. Since CD field is set to 0 for 4:2:2 encoding they report the color depth as 8-bit ignoring the fact that it is 4:2:2 encoding. On Denon & Marantz AVRs, when the CD field values are detected as 0 and the pixel encoding is 4:2:2, the pixel depth is displayed as "---".

The problem with Zidoo X9S 4:2:2 output that I reported in the other thread is unrelated to this. I am almost certain that the X9S output is only 8-bit for YCbCr 4:2:2.
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