Originally Posted by jrref
I don't think anyone denies the fact that the eeColor box works really well. D-Nice posted his results many times. The problem is no HDR or DV
Originally Posted by RichB
The LG built-in LUT supports 4K, HDR, and DV is reporting for duty
3D LUT for HDR doesn't exist in the world of consumer WRGB OLED's. You can't perform any kind of 3D LUT for HDR for many reasons.
Basically 3D LUT for Dolby Vision I don't think its possible, even Lumagen PRO can't pass Dolby Vision signal (passthrou is not possible also), if a company will try to release 3D LUT Box for DV, Dolby is not providing so easy the required license, for example Accupel DVG-6000 is waiting for months for that approval
Since the processing is performed inside to the TV (for Dolby Vision), the TV has to be equipped for that 3D LUT capability, I don't see possible to apply 3D LUT before signal will enter to the TV, using external 3D LUT Box (unless Dolby release their own boxes for that job).
LG 2018 OLED's are supporting 3D LUT for SDR mode only, not for HDR10 or DV. You can't perform HDR10/DV 3D LUT with any kind of external 3D LUT Box with these WRGB OLED's.
Why you can't perform 3D LUT for HDR10 with WRGB OLED's
1) As explained very detailed to this post: https://www.avsforum.com/forum/139-di...l#post56201380
the WRGB OLEDs due to the introduction of the 'white' sub-pixel, this distorts the standard RGB color channel relationship - excessively at HDR brightness levels. (if you sum the Y of 100% patch of R+G+B primaries you get 400nits while the same time if you display a 100% White patch you get 800nit...so your color gamut is limited to 400 nits... this means that WOLEDs can never be calibrated for HDR... ...but can be calibrated with 3D LUT in SDR mode, the recommendation is up 105-110 nits, there will be to ABL limiting and displays are more stable overs the time at these nits levels.
2) OLED's are very unstable to their HDR mode, so this makes any size of cube profiling impossible.
I have posted Drift Plots using LightSpace of Panasonic EZ1000 (LG WRGB panel) with 3 different SDR peak levels and for HDR, to see how unstable the panels become once you are going higher from 110 nits.
Below you wiil see the drift plot of EZ1000 taking a cube profiling with normal patch sequence (without black frame insertion for stabilization, which can prevent increase of panel heat to the pattern area, more details about Stabilization has been posted here
, seems that its improving OLED's stability during large cube profilings, as you can see checking some data coming from LG's C8 here
3) Baked Tone/Gamut mapping can't be disabled... If you want to perform a 3D LUT for HDR10, the display need to have gamma based tracking (not PQ), to be able to provide you the max output possible (700-800 nits) with gamma 2.2-2.4, and don't have enabled any kind of tone/gamut mapping.
The generated 3D LUT table will have target PQ and REC.2020 ColorSpace and the kind of tone mapping you will want (hard clip, soft clip, when the roll-off with start etc...) all these details its something the software will calculate, LightSpace has all these tools at least 2-3 years for 3D LUT for HDR:
So the display will have a fixed output, it will not care about any HDR10 Static Metadata Info of each movie.
BTW the Panasonic EZ1000 supports 66-Point Cube 3D LUT for HDR10, and there is a trick to disable the tone mapping, but because the panel is so unstable, its useless....
Look what is happening to HDR mode using 2% patterns (trying to not trigger ABL and load) this is the LightSpace's drift plot of White patch measured every 30 seconds (axis are +-3 nits), when Klein K-10A used for measurements of 17-Point Cube for HDR Mode with Peak output 796 nits:
The best possible scenario, which has been tested, is to use 9 seconds of Black frame insertion before each measured patch, so it took 26H to complete the 21-Point Cube profiling, in a very cold room, with fan aiming the panel also to cool it down... (while it takes about 2H normally with K-10A without black frame inserction for 21-Point Cube measurements with Klein K-10A and LightSpace).
So with 9 seconds of black frame before each meter read, the Drift Plot improved as you can see:
...but is still unstable, and it was impossible to get a valid 3D LUT for HDR because the panel's unstable performance and the issue with W sub-pixel which is reducing a lot the gamut color volume.
This is a proof that 3D LUT with WRGB (with disabled tone mapping and with display which has 3D LUT for HDR capability) is not working.
Maciej Koper (mkoper - hdtvpolska.com), popular and very expert calibrator/TV reviewer from Poland, performed a lot of testing for dates to find out the best number for stabilization time and helped for these data.
For there reasons, there no problem that eeColor is for 3D LUT for SDR only, since it's impossible to calibrate 3D LUT for HDR10/DV, we will wait to see how RGB OLED's will perform about stability in the future (to prevent at least the 1st issue, with W sub-pixel).