Originally Posted by nathan_h
Which Fury product do you use?
Does injecting "fake" meta data mean that some highlights get blown out or does the curve just work differently?
For some reason, I thought the LG actually ignored meta data when one uses the dynamic contrast Min setting, and just analyzes picture content. I'm not saying it does it "right" but that injecting meta data would have no impact, if that is the case.
Did I misunderstand?
The metadata on the disk is not reliable. Content "Mastered" on a 4000 nit display may be not be substantially different from content mastered on a 1000 nit display but the C7 will use a different base tone curve. Dynamic Contrast = Low improves PQ-EOTF tracking by analyzing this frame by frame. However, in the presence of spectral highlights, the underlying tone-mapping curve seems to be based on the static metadata
LG does not ignore the metadata and this is easily proved by loading the Sony/Columbia disk and pressing 7669 (I think) to bring up HDR patterns with 10000 nit static metadata.
The 100 nits ramp includes a small smooth ramp on the bottom. It is immediately obvious that 100 nits is only a mid-tone, even when dynamic tone-mapping engaged.
I have used the Vertex 2 to override the static metadata and the change on this and the other high nit screens are obvious.
LG dynamic tone mapping restores the APL of most content but when there are spectral highlights reduces the APL to show more detail in the highlights.
One interesting aspect is that Batman V Superman lightning scenes do indeed show more detail in bright areas but lose detail in mid and low lighted scenes, even with dynamic tone-mapping engaged.
More importantly, the brightness and impact of the flashes are also reduced.
IMO, this actually lessens the impact of these scenes.
I much prefer watching this title with the static meta data overridden.
Dolby Vision has this figured out in that DV specifies the tone-mapping curve (LG and others cannot alter it) and the content is mastered to preserve APL while not blowing out most highlights.
I am using an HDFury Vertex to override the static metadata and have left dynamic tone-mapping on. It's a preference, but this results in the a high APL on low/mid tone scenes and some reduction APL on bright scenes.
BTW, HDR10+ does not fix any problems associated from applying an overly aggressive tone-mapping curve because that is under control of the TV/Display manufacturer.
Any display that alters APL 100 nits or lower based on static or dynamic metadata is grossly inaccurate. The PQ-EOTF is an absolute scale.
This is actually worse than ABL because, it dims the average picture level when the display is capable of displaying it a full luminance.
It's mind-numbingly dumb.
The Vertex can be used for greater control of tone-mapping (and the fallback curve). I am not a gamer, but this should solve the issue of games being too dark.
The new Panasonic's UHD layers have tone-mapping controls which also replace the disk metadata with fixed values.
The HDFury Vertex and other new HDFury products can correct overly dimmed issues that are related to tone-mapping for all HDR10 sources.