[noggin]

Noggin,

Thanks for the reading (http://forum.kodi.tv/showthread.php?tid=...pid2361400)

However it appears that HDR-10 and Dolby Vision both require specific metadata handling in addition to just sending 10 bit video over HDMI, so 10 bit decode and output may not be enough.

I think it does, but your optical hardware (TV, Monitor) has to be able to read that metadata as well. So I think your TV has to be HDR10/Dolby Vision capable. And If I'm not mistaken, the TV's with the Ultra HD Premium certificate are.

Yes - your HDR display needs to be HDR-10 and/or Dolby Vision and/or HLG compatible to deliver HDR content - I'd take that as a given. At the moment HDR is being tied to UHD - hence UHD Premium sets having HDR.

After some (little) more thinking I came to the conclusion that we don't need a 'Ultra HD Premium certificate', but a 'Full HD Premium certificate'. Since I should need a 90inch TV in my living room to benefit for the 4K resolution.

Whether there will be Full HD HDR displays (rather than SDR) and whether there will be Full HD HDR content (not the same question) is an interesting one.

AIUI Germany is moving to partial 1080/50p (not 1080/50i or 720/50p) for their next generation OTA standard (DVB-T2, HEVC) and this could support 10 bit, and HDR. In fact I believe one reason they are going this route is to allow for 'better pixels, not more pixels'... So we may see some Full HD HDR stuff there? Would expect that could be HLG (as the SDR backwards compatible signal format for HLG avoids simulcasting and guarantees compatibility)

And as far as i can understand, that is perfectly possible: Dolby Vision is currently qualified with HEVC and AVC decoders. So I guess HDR10 is also?
That would mean: Smaller file size (far more less pixels), for the exact same image (viewed on a 50inch TV from a 3,5meters (11,5 feet) distance)

Yes - though as I've said - I'm sure you need your AVC/HEVC decoders to work with other subsystems to ensure metadata is properly handled and inserted. (You still need some licensed Dolby Vision functionality in your media player for Dolby Vision I believe - not sure what HDR-10 requires. HLG is different as it is also a valid SDR signal - I'm not sure if it signals HDR presence)