Originally Posted by
Bob Pariseau 
The default (0 value) Picture Adjustment settings in the OPPO put out "reference" image values on the HDMI cable. If you are finding them at odds with your display calibration, there are several possible explanations:
1) Your calibrator made a mistake. Let's discount this one, at least for now.
2) You are not actually using the calibrated settings. Displays these days typically remember settings separately for each input. If the calibrator set up input A, but you are actually using input B, then you may not have the calibrated settings in effect. If you copied over settings yourself, double check what you've done. If your calibrator made any service menu level adjustments, it may be he didn't do that for every input in your display. In addition, you need to be aware that various convenience or enhancement settings in the display might mean you are no longer using the calibrated settings. For example, you can't just change "Picture Modes" willy-nilly. And if there are "enhancement" settings like "flesh tone enhancement", you can't set those differently from what the calibrator used.
3) Your calibrator deliberately adjusted things "slightly off". Sometimes displays have problems that can't be fully corrected. In which case calibrators need to pick compromise settings that come as close as possible without being "too wrong" in any respect.
4) You are using a different video data format from the OPPO than what you calibrator expected you would use. The data format is the combination of the HDMI Color Space and Deep Color settings. Now, it *SHOULDN'T* make a difference which data format combo you pick as far as whether the basic, color Saturation and Hue levels are correct. But some displays have quirks (a polite name for bugs) which make them work better with one video input format than another. Your calibrator may have checked things, for example, assuming you would use RGB Video Level instead of YCbCr 4:4:4 or the other way around. And if you are using the other, AND your display has an issue like this, then it might show as a slightly off set of color settings.
Think about what the calibrator set up for you, and what you might have done setting things to your liking after he finished. That may lead you in the right direction. Item (2) above is the most likely cause, so think about those possibilities first.
And if none of that gives you an answer, think about talking to your calibrator and see if he comes up with an answer.
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NOTE: The Blue gel filter that comes with Spears & Munsil comes in two densities in a single cardboard strip. A third, even deeper density can be achieved by folding the filter in half so that you are looking through both at the same time. The reason is that the filter can potentially let through some Red and some Green and thus confuse what you see. This will be more likely if you have a very bright display like an LED display set for use in a non-darkened room. The thing to do is to bring up the Color Bars chart on Spears & Munsil and then look at it through the lighter density Blue filter. What you want to see is if the Red and Green bars in the chart are *COMPLETELY* black. If not, then switch to the darker density Blue filter. IF they are STILL not completely black, then fold the filter in half and look through both filters together.
Once you have figured out which density of Blue filter works for your display, THEN you can check whether color Saturation and Hue settings are correct. If you use too light density a Blue filter, then the Red and Green that sneak past the filter for the non-Blue portions of the chart will confuse your result.
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If on rechecking Spears & Munsil this way you discover the calibrated TV settings along with the default (0) Picture Adjustment settings in the OPPO really ARE correct, but you are still having problems with certain movies, then the odds are you are just seeing an authoring difference in those movies. The color may be a bit "off" for artistic intent, or it may just be an issue in the transfer to disc.
In such case, SURE! If you feel like adjusting the Picture Adjustment settings for personal taste, then go for it! Just be sure to return them back to the default (0) values before you view anything new, as it likely won't have the same issues. The Mode settings in Picture Adjustment let you preset 3 sets of Picture Adjustment settings that you can move between at will.
--Bob
