Originally Posted by Kris Deering
Let's agree to disagree. I don't see how this hurdle is any different than the default HDR settings we see on projectors now. It isn't like those are setup so that most people can easily use them in a wide variety of setups any more than doing a DV mode that assumes a brightness for best results. It would literally be THE EXACT SAME SITUATION WE HAVE NOW. And just like now, the only way to get the absolute best results would be getting measurements done and entered in to tweak the image to the best result, in other words a calibrator.
A tone map is a tone map. They have to be based on a display peak light. They don't know it now with the HDR modes on these projectors, they are just using some random assumption. They could apply the exact same assumption as the default for DV.
Sure, but Dolby, without solving this, would be putting their name to something which is crap, much like the built-in HDR curves in the current JVC. JVC are free to do that of their own will with their own HDR tone map implementation, but you just wouldn't put your brand name, which is supposed to be synonymous with HDR excellence, on something that didn't actually solve what the customer wanted without them having to engage the services of a pro.
As far as I'm aware none of the Dolby techs for the home for anything require
calibration. The closest would be AVRs that need to have levels set appropriately per channel, but this is outside of Dolby's sphere (the DD decoder just outputs correct levels and assumes the AVR sorts any channel imbalance). So I actually see calibrator based options being at odds with Dolby's modus operandi of providing a tech that does a job.
I can also imagine another hurdle. It is quite possible that the tech algorithms used by Dolby actually doesn't scale very well; they don't have to when they're dealing with displays that aren't so far away from the actual required peak brightness. The level of adjustment required to mangle the DV HDR range to a typical PJ might need them to revisit their algorithms.
In the IM stuff Lumagen did they had a very clear design goal - they knew most of their customers were doing this for projection and needed to cover a very big range of adjustment. I wouldn't like to bet the current DV implementation is even suitable for the job of tone mapping DV mastered content for projection.