2018-09-28, 10:56
(2018-09-28, 05:41)Mount81 Wrote: Maybe in the next Gen low-end IGP's we will also get that, but till there's a long way to go...I expect this is purely a policy decision, not a hardware limitation. The only difference between HDR replay and output to an HDR display of HDR10 HEVC 10-bit 2160p content (which low-end Intel IGPs don't do) and SDR replay and output of SDR HEVC 10-bit 2160p content (which low-end Intel IGPs do do) is the insertion of an 'I'm ST.2084 EOTF' flag and a small amount of light-level metadata in HDMI info-frames or similar, and for HLG HDR content it's simply an 'I'm HLG EOTF' flag (coupled possibly with an 'I'm Rec 2020 gamut' flag)?
This is almost certainly a limitation enforced at the driver level it seems to me - not necessarily a hardware limitation? That said - conversion of HDR content to SDR may be a bigger processing issue which has meant HDR support has been nixed irrespective of output format (but I don't think it is?)