Considering professional calibration, I have questions
While my LG OLED55B7P is a more enjoyable picture than any LCD I've even had, I get the feeling my unit is a little further off the mark than normal with the default calibration. In particular there is an excessive amount of red. Trying to adjust tint never seems to work since by the time reds seem right everything else seems wrong.
While I cannot be accurate without more advanced tools, I believe the red gain in the White balance is off by about -20 points. Pulling -15 points out of the red channel luminescence and the red tint about +15 points puts me pretty close to what I think looks right.
I have a few questions about calibration before I go investing in the process, hoping some one has enough knowledge to help me out.
I get the feeling ISF calibration will likely aim the Gamma at 2.2, and the temperature to Warm 2. As I normally watch in a dark room, I prefer BT.1886. If the 20 point white balance is correctly calibrated for 2.2, should the BT.1886 setting also be correct when I change only the gamma selection? Will a cooler cooler temperature setting be accurate (for that setting) when the calibration is done using Warm 2? If I need to change the OLED light level for a brighter room, does that mean I need a new set of white balance values? My hope is that gamma, OLED light, and color temperature settings are all relative to a correctly set white balance base line, but I have no idea if they really work that way.
Then there is future proofing. The vast majority of the content I watch is 1080 SDR, if I copy/paste the same settings to 4K HDR will they be accurate? Or will the white balance and color management need to be calibrated separately for that content?
Posted Aug 29, 2018, 9:53 PM UTC
Just a quick check - You haven’t got Eye Comfort mode switched on have you? Because that adds an awful red tint over everything.
A decent professional calibrator will never arrive with any preconceived prejudice towards settings. They should just use their tools to set the right settings for your personal environment - their measurements will guide them to which Gamma to best use.
No you cannot just take SDR settings over to HDR... but...
A decent professional calibrator will not just set up one preset and fuck off... you should get... SDR Settings for both dark and bright room, SDR gaming settings, HDR 10 setup and Dolby Vision setup, and HDR gaming... furthermore they should give you a pack containing every single setting written down, so you can manually re-enter them yourself should something bad happen that forces you to factory reset the TV.
Anything less than that and they are probably not a true professional and you shouldn’t let them anywhere near it.
There are cowboys in all lines of work, and someone who has just bought the measuring equipment online (with zero training in using it) Just to make a quick buck can do more damage than good.
Go to one of the big AV forums, ask for recommendations from others in your location, do research, interview prospective services etc.
And finally, remember that you are getting the TV calibrated... This means the TV is being set to an industry accepted standard to which all movies and broadcasts are then colour graded, so you can view your content as close as possible to what the director intended.
The equivalent of someone checking a builders measuring tools are correctly calibrated to make sure the wall he is building is the exact size written on the plans.
So if after they leave, you find yourself disappointed, it may be a problem with you, not the TV. LG’s are very good out-of-the-box, I can’t imagine one got through quality control a whole 15 points off in the red spectrum.... but then, viewing this sub in the last few weeks is making me wonder if there is anybody getting a decent panel these days.
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I have Eye Comfort mode off, yea. It seems to auto-adjust the color temp and with it on in my room that means Warm 3 (which does get too yellow). I'm normally set to Warm 2, but have tried the others. I can tell it gets more blue and less yellow, but I still have exaggerated reds.
Added an Example in another thread since I fail at Reddit and could not add the image to a reply
https://www.avsforum.com/forum/139-display-calibration/586330-isf-calibrators-where-you-located-please-post-here.html Go here to find a good calibrator. I just had my 77C8 done by Jeff Meier (incredibly good). I have a totally light-controlled HT and my display is set up using Cinema User for HDR and Dolby Vision content and ISF Dark Expert for cable, Roku Ultra and xBox One. All I do is choose the input for what device I want to watch using my Marantz pre/pro. Settings are saved for each device and switch automatically. The PQ is just amazing. All inputs are using Warm 2 and gamma 2.2 (though I do change it to 2.4 and lower brightness when using my Spectrum cable). As posted above, a good calibrator will access the lighting where your display is viewed and adjust the display's setting to give you the maximum best PQ. If you have a preference for how you want content to look, you can ask to have it set up accordingly or just make minor tweaks in the final settings (almost every calibrator will give you a copy of everything that has been done to your display so that if you do change anything you can always refer back to the originals.) I think a calibration is worth every penny because once you get it done your display is giving you exactly what it is capable off PQ-wise, in my opinion, anyway. If you do go this route, I'd turn off auto updates for firmware. There has been some discussion (concerning LG OLED updates, anyway) that they can change some default settings for the picture modes. The newest update for my C8 did just that to the Technicolor picture mode defaults (which, luckily, I don't use). Check out the link, ask questions and decide for yourself. I sold the 65” ISF calibrated Panasonic plasma that I bought in 2009 for my HT to my nephew and it still looks amazing.