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Join Date: Jun 2001
Location: L'Etoile du Nord
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The LG OLEDs seem to perform HDR10 tone mapping based upon the Max Luminance value in the HDR metadata (as previously reported by others in this forum). Even though this value represents the mastering display's capabilities. The MaxCLL metadata value represents the highest brightness reached in the disc.
The new Blade Runner 2049 UHD disc (USA version) has HDR10 metadata with Max Luminance at 10,000 nits and MaxCLL at 181 nits. That is a huge difference if LG adjusts tone mapping based on the 10,000 nit value instead of the 181 nits maximum brightness level.
I used an HDfury Vertex 4k video processor to capture the HDR10 metadata and to replace the 10,000 nit Max Luminance value with 1000 nits instead before the signal is sent to my LG B7A. All other HDR10 metadata was sent unchanged.
It made a very significant impact on the overall brightness of the picture, brighter highlights, and more detail in dark scenes.
I think it is a mistake on LG's part to be tone mapping based on whether a disc is mastered at 1000, 1100, 4000, and now even 10000 nits. Those values don't represent the highest brightness present in the content; only the capabilities of the mastering display used.
JVC RS500|LG B7A OLED|Denon X6400H/X4200W|Panasonic UB820|Two Oppo 203|Samsung K8500|Apple TV 4K|HDfury Diva/Vertex/Linker/Integral
Last edited by claw; 01-18-2018 at 09:46 AM.