Originally Posted by David Aiken
I've been playing with the Deep Colour setting on my 105. I use HDMI2 out so there are only 3 options, 36 bit, 30 bit, and off which is 24 bit. It doesn't matter which setting I choose, when I check the Info display, it tells me that HDMI2 is outputting 24 bits. If I swap to HDMI1 out, I get more options and the Info display reports that the 105 is outputting whatever I select.
So, there is obviously a problem with HDMI2 and Deep Colour. Either there is no deep colour output, the options in the HDMI Options panel are wrong, and the Info display is reporting things correctly, or HDMI2 does deliver deep colour output but the Info display reports output from HDMI2 incorrectly. I'm not certain which it is, there are times when I think I can see a difference with Deep Colour on and times when I don't think I can see a difference and the manual says the difference is subtle if it does make a difference but either way there is a problem. Either there are no deep colour options for HDMI2 out in which case the settings menu is wrong, or there is deep colour output and the Info display is wrong.
Has anyone else noticed this?
I'm going to answer my own query. I hadn't been able to work out what bit depth signal the TV was receiving because the info display on my E6 does not show that. Then I realised that the video info screen I can bring up on my Marantz AVR does display bit depth details. So:
Output from HDMI2 on the 105:
Using 4:2:2 colour space, the bit depth on the Marantz display shows "–––"
Using 4:4:4 colour space, the bit depth on the Marantz display shows 24 bits for all 3 deep colour settings, 36 bit, 30 bit, and Off (24 bit".
If I swap to using output from HDMI 1 on the 105, and 4:4:4 colour space, the bit depth displayed in the Marantz's info window is exactly the same as the bit depth selected in the deep colour options on the 105.
What that means is that there is a bug in the 105's firmware.
Either you cannot get deep colour 30 or 36 bit output from HDMI2 because getting those bit depths requires the use of the QDEO processing chip which is bypassed for HDMI2 output, or the 30 and 36 bit deep colour selections in the deep colour options for HDMI2 are not working correctly.
That means that if you want to try experimenting with deep colour settings on the 105 you have to be using HDMI1 out for the video signal.
Oppo need to either remove the HDMI2 deep colour options from the menu if deep colour output is unavailable from HDMI2 or they need to identify the reason that deep colour output from HDMI 2 is not working and fix it gif deep colour output should be available from HDMI2.