From CE Pro "Upcoming HDMI 2.1a Version Update Adds Source-Based Tone Mapping to Maxi

[mkozlows]

Originally Posted by wxman2003

I guess those of us that watch via disc on a UHD player will have to hope the vendor updates our players for this to work. So much for my OPPO 203 getting updated.

Why would you care about it on a disc player? The whole point of this is for sources to get information about what a TV can do, so that they can tweak their output to be Just Right for that TV.

There's no real reason to do that with pre-recorded TV/movie content, which is mastered at whatever it is, and can be tone-mapped just as easily at the display as at the source.

What this is for is signals that are being generated on the fly -- gaming, obviously, but the linked article also mentions the home screens on streaming devices as another place. This is really just taking HGIG to the next level, automating it so that your Xbox or PlayStation can _know_ what your display can do, instead of requiring you to go through some calibrate-by-eye screens to manually define your TV's limits.