Whoa Amigo That may be true in photography not so simple with TV the implementation and the usual TV limitations are often different .
U sure I.. thought HDR was an optional component of rec 2020 and just (more likely pending ) or added in to the itu rec . 2020 ? U sure about the other stuff and not conflating that i.e. color gamut/color space with Chroma sub sampling that's what it sounds like to me ? how you think recc 2020 + HDR broadcast and IPTV standards happen U think they come out of thin air?
...... you know what the itu is right ?
You know how an LCD panel cell works ? Think thin film transistors to start and add in spatial and temporal dithering and throw in high frame rate control, maybe some pixel tuning while you are at it those are 5 starting points that don't include the lights or the LVDS algorithms and digital discrete time signals . .
ofc
UHDTV HDR includes additional contrast and brightness (i.e. luminence and dynamic range of same )and color gamut/color space and YbCbr 4:4:4 chroma sampling, additional bit depth[/U] also all i.e. all components of HDR and with color space and YbCbr 4:4:4 chroma sampling and bit depth all specifically specified ) to itu rec.2020 and any pending addendums to same also that's the whole idea....and reqired for itu UHD HDR broadcast and digital transmission standards which usually carry over to consumer devices besides television receivers .
You do know HDR requires 11 Bit not 10 right ? (they just round it off) you know how they do that with a 10 bit +high frc panel it's called high speed temporal dithering
You know no consumer TV can do full in HDR probably not in 2016 also but some fake it or can do D3 or both ...... you know what D3 is ?
As HDR applies specifically to to itu standards compliant and *pending standards compliant2160p television You can have UHDTV without HDR but you cant have
full HDR without rec 2020 compliance *as it applies to compliant standard and *pending standards compliant television and digital transmission standards *
which includes rec2020 bit depth color space and chroma sub sampling etc. (see above )
Just goes to show that there is
more to standards and *pending standards compliant UHD ..HDR than meets the eye and color space is integral to HDR *as it apples to UHDTV* and you don't have to know everything ....or the subject to post on a forum .