Originally Posted by FuzzyReets
Hi, with HDR unticked, XBOX One S will output 2160p REC.709 YCbCr 4:4:4 (no-HDR), to LG OLED 65E6 where I checked the signal with HD Linker:
Hi TEDDD. Given what looks to be a high understanding of all this stuff I want to hijack this thread real quick as I cannot seem to get a straight answer on the best way to do this. Currently have a B6 OLED and using the Xbox1S for 4k blu ray. Actually just got my B6 last week and I want to calibrate it. Have you done this? If so, what did you use? What picture mode on the B6 did you start with before calibrating? Again I know I'm hijacking this to a degree but I thought I'd ask as I haven't gotten answers elsewhere and this thread is pretty active. Help would be greatly appreciated. Thank you.
Hi, your quote was missing some code: https://www.avsforum.com/forum/149-bl...l#post50395233
...so I haven't received any notification, no problem, I have just found your post.
I have calibrated 65E6, in HDR10, SDR, 3D and SDR with 3D LUT using eeColor 3D LUT Box. (For SDR I used ISF slot with normal colorspace and warm 2, for HDR10 the normal colorspace also used.)
About the results with eeColor I have posted here: https://www.avsforum.com/forum/40-ole...l#post49623817
Using LG internal calibration controls, it has 2 and 20-Point Grayscale controls and 1-Point CMS (6-Axis). From the controls only Grayscale controls are working, the CMS controls it will work in measurements only but provide bad picture with real content or by verifying looking color reproduction patterns.
You can use the 20-Point Controls to get a perfect RGB balance and gamma tracking, but only Grayscale is not enough to provide you reference colors. LG has an issue in it's Color Gamut mapping, the Normal Gamut it has provides a close gamut coverage to REC.709 (a bit oversaturated) but the tracking of low end colors is expanded to larger coverage, this is something I haven't seen before, seems that the LG engineers haven't programmed well that, see what is happening when you measure the lower luminance levels...this picture shows a 20-Point Luminance Sweep @ 100% Saturation, starting from 100% until 5%. From 25% Luminance and below the colorspace coverage is larger, this will provide non-linear gradients or other problems with strange shades to real picture (example here
). Usually that kind of measurements are ignored from the users which measure only a few color points to validate the post calibration results.
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So using LG Internal controls you can calibrate the grayscale in SDR, 3D SDR or HDR10 mode. In DV mode the white balance controls are disabled.
If you want to get the best possible picture performance you have to use a 3D LUT Box (like eeColor 3D LUT Box which has the largest 3D LUT memory in the global market while it has the lowest price also), pre-calibrated only your 100% White of the LG (using the internal controls) and then let the other thousand color points to be measured by (LightSpace/CalMAN/DisplayCAL/ArgyllCMS) and from the thousand points it will be measured automatically, the 3D LUT correction will be generated for 65-Point Cube (274.625 Color Points). Here
you can see a comparison of color points between internal controls of a display compared to 3d lut cube sizes of various 3D LUT devices.
Using 3D LUT you calibrate many different levels or saturation/hue/luminance, so your performance will be reference at any color, in 8-bit systems, the allocation of 17 nodes per component (17-Point Cube) proves that is best trade off between display/meter/processor hardware / measuring time / display stability and overall quality, that's why that size is commonly used at pro industry. Now by ultra fast meters like Klein K-10A, 21-Point Cube requires less time than before (about 2H 30M in total; with 0.5 sec of delay before each patch read), and it has become the standard used size (in post-production).
The most important is the total volumetric accuracy for the best final results, consumer displays has not so linear tracking to all it's areas, so a large cube with a profiling sequence that 17 or 21-Point Cube (4.913 or 9.261 Color Points) grid-based with equal spaced RGB values will cover all potential colors equally and give the most accurate correction.
Ever Dolby Monitor which designed to be reference needs 3D LUT profiling to meet the tight tolerance in color errors that required for critical color reproduction for movie grading in post-production facilities.
For example Dolby Monitor PRM-4200/4220 has 2x 65-Point 3D LUT Tables slots, same size like eeColor 3D LUT Box features (which has 6 memories).
HDR with 3D LUT is not possible because you can't bypass the LG's internal gamut/tone mapping. (you can't bypass it using any other consumer display also)
Just the above is the best solution for reference quality SDR pictures, because REC.709 (blu-ray) is a colorspace which LG is covering 100% calibrated and cover obviously blu-ray's mastered luminance also (100-120nits).
BTW sorry from XBOX users for this long post, I will post in a few minutes something interesting for X-Box One S users, to bring conversation back to topic related stuff.
If anywant want to ask something please quote me to another thread related with calibration.