Originally Posted by Scott Wilkinson
As far as I know, this is not true. Dolby Vision is a proprietary, end-to-end system that must be licensed from Dolby, so an HDR10-compatible display will not be able to reproduce a DV-encoded signal unless it also has DV decoding. Likewise, a DV display will not be able to decode HDR10 unless it has both; for example, the Vizio Reference will not decode HDR10, only DV.
Also, HDR10 is required for UHD Blu-ray, while DV and Philips HDR are optional, but they are not "extensions" of HDR10 (at least, DV is not; I don't know about Philips). As far as I know, Technicolor HDR is not included as optional in the UHD BD spec.
It's important to understand that HDR10 and Dolby Vision are not interoperable, nor is one an extension of the other; they are mutually exclusive. I see this as a big problem for HDR going forward.
Thanks for this Scott. I do know that DV is a proprietary system, but my understanding was that every title had to support the mandatory HDR layer (HDR10) and could extend beyond that with proprietary extensions, like DV, Philips, etc. In other words, that every HDR display could display the HDR10 part (mastered to 1000nits) but only displays with a proprietary extension (DV, Philips, etc) could go further than that. I was seeing this as similar to a DTS HD track: every one can play the DTS core (HDR10) but you can only play the HD extension if you have the specific capability (DV, Philips, etc).
If it's not the case and if HDR10 is only mandatory at player level, then I agree this is a huge issue going forward, depending on how this is dealt with during playback. Does this mean that DV title will be played in SDR if the display doesn't support DV?
Also does it really mean that an HDR10 title would also play in SDR on a display that only supports DV? I thought HDR10 was mandatory, so how could a display or player support DV (or another proprietary format) but not HDR10?
I'm totally ready to accept that I was wrong (in which case this industry is mad, which isn't a surprise), but please could you double check this with your contacts and confirm what a non DV compatible display does when the player plays a DV title? Thanks!
Originally Posted by stanger89
The question is, what does "Mandatory" mean, if it means every UHD BD has to have HDR10, then I don't see it as a big problem, any disk should work on any TV (I'd certainly hope every TV will support HDR10). Like audio formats there's room for more than one, provided there's some minimum baseline that works on all systems. Now if they do something dome like letting manufacturers master to HDR10 or Dolby Vision, such that any given disc may not work on all displays, then that's a disaster in the making.
Like you, I assumed that mandatory meant for each title. If mandatory is for the player, ie each player has to support HDR10 and the other formats are optional, and if displays don't have to support HDR10 either as Scott suggests, then a DV titles will likely play in SDR on a non DV display, which really blows as it looks like DV is becoming quite prevalent in the movie world (at least regarding cinema releases). Of course they might master all UHD Bluray titles to HDR10 to avoid compatibility issues, given the fact that no consumer display currently handles more than 1000nits, but that's not what I heard.
Originally Posted by Mike Garrett
I requested info, but have not gotten an answer yet.
Please get us the info ASAP, especially regarding what happens when a Dolby Vision title is played!