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LG OLED Profiling/Calibration Guides

 
Author ConnecTED
LTE
#1 | Posted: 9 Apr 2021 18:19 | Edited by: ConnecTED 
They are available very detailed PDF guides for LG OLED 2018/2019/2020 SDR 3D LUT profiling, HDR10/Dolby Vision calibration for 2019/2020.



LG Guides for ColourSpace (~70 pages) will explain with great detail the required steps; for users to understand what they are doing; to perform the best possible calibration per each calibration mode.

The downloading method for LG Guides has changed.

Now the users can instantly download or check if it's available any updated guide very quickly, without filling any form or sending an email request.

The new LG OLED Guide Download page is here: https://displaycalibrations.com/lg_oled_guides_using_colourspace.html

The download link is not visible because the form is locked.



The password to unlock the download page is the same password the LG Template users (with approved username) are using to unlock the LG Templates.



The LG Guides release notes will be available on the regular page for a quick check before starting the LG OLED profiling.

Author ConnecTED
LTE
#2 | Posted: 14 Apr 2021 18:53 
LG OLED SDR Profiling using ColourSpace and DaVinci Resolve iTPG

I wanted to post some further instructions for DaVinci Resolve users of ColourSpace, as additional info beyond the LG Guides for Profiling/Calibration, to understand how iTPG of Resolve works.

The iTPG of Resolve will receive 0-255 values from ColourSpace with Patchscale @ FULL.

You can see the RGB-Triplet of each patch to the Resolve Dialog window when Resolve iTPG has connected with ColourSpace:



According to the Video Monitoring setting in Resolve, resolve iTPG will scale to LEGAL or retain FULL levels.

According to the Resolve Project Settings -> -> Master Settings -> Video Monitoring -> Data Levels setting:

When Video is selected, Resolve with scale the ColourSpace 0-255 value to 64-940 to the DeckLink output. LG OLED will receive 64-940.



When Full is selected, Resolve will not scale the ColourSpace 0-255 values; it will output 0-1023 values to the DeckLink. LG OLED will receive 0-1023.



Since the LEVEL scaling performed to the output of DeckLink, controlled by Resolve, users have to use FULL patchscale in ColourSpace, use a FULL patchset, and then control the scaling from Resolve's Project Settings window.

Based on this information, when required a VIDEO LEVEL (LEGAL) profiling, it will need to configure ColourSpace to FULL patchscale, use FULL range patchset, and set Video Monitoring to VIDEO Levels @ Project Settings.

LG OLED LUT Capability

LG OLEDs internally have 64-1023 3D LUTs (EXTENDED), with HDMI Black Level @ LOW.

When LG has Contrast at 85, the internal LUT will be 64-1023.

When LG has Contrast at 100, the internal LUT will be 64-940.

LG OLED LUT Profiling Options

They are three methods available to profile the LG OLED with Resolve.

Allow Headroom (WTW) and profile LEGAL:

Use Contrast 85 (or below ...if required to fix Panel Factory Calibration), use FULL patchset, FULL patchscale, Video Levels @ Resolve Settings. Apply Videoscale Sub-Black before exporting 3D LUT DeviceControl File Format.

Before profiling, set Target Luma 100 nits (Patchscale FULL), pre-calibrate Reference White (255.255.255 RGB Triplet) in Manual Calibration windows) for 100 nits.

After the LUT Generation, apply a Videoscale Sub-Black Filter to map the 940 of your reference white to the 940 of the 64-1023 LUT.

(FULL patchlists are not provided inside the LG REV. 4B, they are available for download as ''SDR 3D LUT FULL Patchsets for Resolve and LEGAL profiling'' ZIP @ LG OLED Guides Page)

Clip Headroom (WTW) and profile LEGAL:

Use Contrast 100, FULL patchset, FULL patchscale, Video Levels @ Resolve Settings, export 3D LUT DeviceControl File Format.

Before profiling, set Target Luma 100 nits (Patchscale FULL), pre-calibrate Reference White (255.255.255 RGB Triplet in Manual Calibration windows) for 100 nits.

(FULL patchlists are not provided inside the LG REV. 4B, they are available for download as ''SDR 3D LUT FULL Patchsets for Resolve and LEGAL profiling'' ZIP @ LG OLED Guides Page)

That method can be used from LG 2018 OLEDs, which are not suffering from factory panel calibration issues; some 2019 LG OLEDs (rarely) affected.

Systems with DeckLink with SDI output that uses SDI -> HDMI convertor can use that method.

Allow Headroom (WTW) and profile EXTENDED:

Use Contrast 85 (or below if required to fix Panel Factory calibration), use EXTENDED patchset, EXTENDED patchscale, FULL Levels @ Resolve Settings, export 3D LUT DeviceControl File Format.

Before profiling, set Target Luma 100 nits (Patchscale EXTENDED), pre-calibrate Reference White (255.255.255 RGB Triplet in Manual Calibration windows) for 123.4 nits.

The 3rd method explained to the LG Guides REV.4, its the recommended method, especially for LG 2020 OLEDs suffering from factory panel calibration issues.

Author ConnecTED
LTE
#3 | Posted: 14 Apr 2021 18:54 
Allow Headroom (WTW) and profile EXTENDED Profiling Method Setup Explained (Resolve iTPG):

Ideally, the best procedure is to pre-calibrate / profiling for 64-1023 (EXTENDED) and verify the profiling with 64-940 (LEGAL) ...use Resolve with VIDEO @ Project Settings after profiling.

It's the method explained inside the LG OLED PDF Guide REV.4b, and it will require an EXTENDED patchset for profiling and LEGAL for verification. These patchsets and instructions are included.

However, it will require using the method I will explain below about how to generate EXTENDED patches with iTPG of Resolve.

I made this introduction for the users to understand that based on these options of Resolve/ColourSpace, the iTPG of Resolve can generate LEGAL or FULL patterns, not EXTENDED.

However, I found a trick to able to generate EXTENDED patches with iTPG of Resolve.

When using iTPG of Resolve controlled from ColourSpace via DeckLink HDMI output, with a video data project and ColourSpace patchscale FULL (0-255), an LG OLED will receive 64-940 (video level patterns).

For example, using a DeckLink Monitor 4K HDMI output with 2160p24 video monitor setting, LG OLED will receive RGB 10-bit when the SDI4:4:4 is ticked, and YCbCr 4:2:2 10bit with SDI4:4:4 unticked, using LG OLED Black level @ LOW:

Using a regular workflow, DeckLink will generate LEGAL (64-940) with VIDEO Levels @ Resolve Settings or FULL (0-1023) with FULL Levels @ Resolve Settings; you can't generate 64-1023 patches, so users were using a PGenerator or an external RGB bit-perfect generator to generate EXTENDED patches.

However, I have found a method, which has verified with external scopes also to send 64-1023 patches from Resolve iTPG to the LG OLED, but it will work only with a DeckLink card with HDMI output and only when its enabled the RGB output of the Decklink. (SDI 4:4:4 ticked).

I don't have an adaptor (SDI -> HDMI) to verify that this method is working when users will send RGB from SDI with an SDI -> HDMI convertor. It will require to use 4:4:4 SDI and a resolution which supports 444 with SDI, for example, the 1080p24 of DeckLink Monitor 4K.

For DeckLink Monitor 4K to able to send RGB from HDMI, it will require to tick the SDI4:4:4 setting with 2160p24.

You can confirm that LG gets RGB using HDMI Diagnosis hidden menu.

As you can see, when SDI 4:4:4 is unticked, LG will receive YCbCr 4:2:2 (10 bit...LG doesn't count the bits. 4:2:2 subsampling doesn't send General Control Subpacket to describe the color depth, so while you see 8bit, it's 10 or 12 bit in the real world.)



When SDI 4:4:4 is ticked, DeckLink 4K will send RGB 10-bit to the LG OLED:



When you want to calibrate LG internal SDR 3D LUT, ideally, you need to use RGB 64-1023 patch generation to match the internal LUT range.

For Resolve iTPG, to able to send 64-1023 patches, you have to set FULL Levels @ Video Monitor Data Levels @ Resolve Settings, set from ColourSpace EXTENDED patchscale, Resolve will receive 16-255 patches from ColourSpace (set LG OLED HDMI black level @ LOW.)

Using these settings, iTPG of Resolve will work in 0-1023, and the ColorSpace due to EXTENDED patchscale setting will send 16-255, so LG OLED will receive 64-1023 patches.

About the Pre-Calibration / Profiling using these settings, for the LG OLED to receive 64-1023 patches. (Resolve SDI 4:4:4 ticked, Full Data Levels Video Monitor Setting, EXTENDED patchscale and LG OLED Black Level @ LOW)

Use the REV.4b Guide patchset for profilng.

After loading the 3D LUT correction to the LG OLED, set patchscale to FULL and verify the calibration using the verification patchset from SDR 3D LUT FULL Patchsets for Resolve and LEGAL profiling'' ZIP @ LG OLED Guides Page), set Resolve Video Monitoring at Video, so the verification will be performed to 64-940 range. (TV HDMI black level is at LOW.)

After the end of the verification, keep the Resolve Video Monitoring to VIDEO @ Video Monitoring Settings.

Author ConnecTED
LTE
#4 | Posted: 15 Jul 2021 17:06 
LG OLED 2021 Template (REV.2) is now available for ColourSpace/LightSpace users.

The REV.2 version of Template for LG OLED 2021 TVs is now available for ColourSpace users with HTL license level or higher (not for ColourSpaceZRO/DPS)

LG 2021 Template users can refresh their Cloud and then transfer from ''Cloud'' to their Local the LG 2021 REV.2 Template.

Some users had an issue with the reset 3D LUT function of the LG OLED 2021 Template.

I had temporally suggested these users to upload a UNITY (reset) 3D LUT file using the 3D LUT upload function, which is virtually the same as using a reset 3D LUT function.

This revision has fixed the reset 3D LUT function of the template.

Author ConnecTED
LTE
#5 | Posted: 27 Jul 2021 13:14 
PGenerator Settings for HDR10 with LG 2020/2021 OLEDs using HDMI Override (without using HD Fury)

LG 2020/2021 OLEDs have a hidden HDMI override menu,

It will allow the configuration of the HDMI input metadata by overriding it.

It's the available configuration of Colorspace, EOTF, ST2086 metadata, also MaxCLL, MaxFALL.

While you send an SDR signal using PGenerator (with an HDR10 patchset), highlight the picture mode in the main menu, and press ''1113111'' from the TV remote.

The HDMI Override menu will appear.

Then set these options for HDR10 calibration/verification:



Configuration settings can be stored per HDMI input.

It will not require to have HD Fury when you have only a 2020/2021 LG OLED to calibrate/verify HDR10. (for LG OLED 2018/2019, it will require HD Fury)

Author ConnecTED
LTE
#6 | Posted: 22 Aug 2021 14:24 
LG OLED Profiling/Calibration Guides REV.5a (22 August 2021) Released!

Leon has updated the LG Guides and it's now available for download the ColourSpace CMS Calibration Guides (REV.5a).

Release Notes

Added a new PDF, ''Naming convention changes to 2021 model year LG OLEDS''

That PDF explains some differences of LG TV Menu introduced to the 2021 models:

Color Temp WARM in other LGs OLED (2017-2020) is the same as +50 with LG OLED 2021.

Color Temp COOL in other LGs OLED (2017-2020) is the same as -50 with LG OLED 2021.

Black Level LOW in other LGs OLED (2017-2020) is the same as LIMITED with LG OLED 2021.

Black Level HIGH in other LGs OLED (2017-2020) is the same as FULL with LG OLED 2021.

ColourSpace changed the name of the 'Primary Only' -> 'Gray & Primary Ramp''; the guide has been updated to cover that change.

Added patchlists for PGenerator users with HDFury or HDMI Override for HDR10 calibration.

Using PGenerator (or other external generators; Murideo/DVDO/Accupel/Lumagen) will require to use LEGAL patchscale with LEGAL patchlist for HDR10 calibration.

When iTPG is using, it will require FULL patchlists.

Both patchlists are included.

Download

You can download the new LG Guide here: https://displaycalibrations.com/lg_oled_guides_using_colourspace.html

The download link is not visible because the form is locked.



The password to unlock the download links uses the same password the LG Template users (with approved username) are using to unlock the LG Templates.

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