Originally Posted by mrtickleuk
That would be a really bad idea. The black level problem, which doesn't always happen, is an issue with the Dolby processing that needs fixing. If you reduce Brightness to 49 in an attempt to "fix it" for those occasions, you break the entire conversion from 2.2 gamma to PQ EOTF not just for those wrong-black instances but also for the rest of the time when it was correct anyway. Using Brightness=49 is not a fix at all. (But yes, it is true that many people seem to think
that it is, so yes, lots of people "prefer" it
Is this a complaint for Sony or Panasonic OLED users or is it purely a LG problem?
Default 50 brightness on my Vizio P55 thats a RGB IPS panel, black level is to dark for HDR10. I really believe this is a factory calibration issue. One click up and black detail is proper, with no lifted blacks.
This is observed after using the Benchmark disc brightness pattern where it shows black detail clipped before the adjustment.
Until 7 months ago, Vizio had released some questionable factory calibrations for Dolby Vision. Gamma was under 2.2, I would say, way under 2.2. Today its spot on, with far better color accuracy.
Is this a black bar issue?
If so, then its a color grading issue, Dolby discovered that color graders were Lift to adjust content black levels, essentially lifting black bar black levels.
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