Originally Posted by EDH63
I'm sorry, I thought you were familiar with the 93 settings. The QTC is the Qdeo True Color setting. It's applied to HDMI1 when a deep color mode is enabled. I can go into the settings and enable that deep color mode on HDMI1, but I wanted to see if it's even necessary. I thought maybe you had some first hand insight into this.
The underlying settings of the QDEO processing are not accessible to the users. You can, as you say, choose to activate the 30 or 36 bit "Deep Color" data formats (assuming the next device in your video chain actually accepts those as input).
I've previously posted on this that the choice here depends mostly on nuances of how the rest of your video chain is implemented -- i.e., what's happening in your AVR and Display.
There is no simple answer here as to whether (or when) turning on Deep Color will produce better looking results. In some cases you will be fighting bugs in the other devices. In other case you will be fighting simple corner cutting (e.g., a device that accepts 30 or 36 bit input but simply trims that back down to 24 bit as the first step on input). It's a tough call for any owner because what features you have turned on in the AVR or Display, and the choices you make on data format (YCbCr vs. RGB for example, or 1080p/24 vs 1080p/60) can make a difference EVEN THOUGH they should NOT make a difference. There's also the issue of whether or not your video chain works better if the output of the OPPO is "Dithered".
And the problem is that typical video calibration charts don't reveal the type of stuff that's going on here -- whether that be bugs or implementation quirks, or the potential good results of passing on rounding data in the extra bits. The charts are just not designed to make such stuff visible.
I've posted a suggestion that one way to make this choice yourself is to use a scenes or set of scenes that makes these differences more evident.
The one I've personally found most useful is in "Ratatouille", Blu-ray, Chapter 10. Here's my post regarding that:http://www.avsforum.com/avs-vb/showt...8#post19915778
IMPORTANT: You must have your basic levels set properly to have a chance of seeing the subtle differences between these video data format choices: Whites (Contrast), Blacks (Brightness), shape of the Black to White response curve (Gamma Correction), colors (Color and Tint) and vertical edge enhancement (Sharpness). Be aware that some AVRs and displays have peculiarities requiring different settings for these depending on the format of the video input. This should NOT be true, but it sometimes is, so you need to determine the correct levels for each video format (combo of Color Space and Deep Color) you want to try to see if any changes are needed for any format. You can check these level settings with a good calibration disc such as Spears & Munsil, Blu-ray. Ideally, all such level adjustments should be made using the controls in your display. Leave the Picture Adjustment settings in the OPPO at their default (0) values.
ETA: If you DON'T see an advantage with 30 or 36 bit Deep Color enabled in a test like this one with Ratatouille, then it is probably wisest to stick with Deep Color OFF or OFF (Dithered). Those use 24 bits per pixel which is, thus, a lower bandwidth signal than 30 or 36 bit. Which means you are less likely to have occasional HDMI handshake problems.