Sanctuary
Member
It's not really confusing. HDR10 standard requires 10 bits per channel while chroma subsampling is independent to this requirement.
So a proper high quality HDR10 setup should be 10 bpc with RGB or 4:4:4 sampling.
Then the implementation details kicks in:
a) You could in theory have HDR metadata transferred alongside a lower or higher resolution color information - with 8 or 12 bpc data. How it will work totally depends on your TV/screen and its ability to do something with such out of spec signal.
b) HDMI 2.0 have issues transmitting a 4K+HDR10+4:4:4 signal at 60 Hz as such mode reaches the peak bandwidth available on HDMI 2.0. Thus sometimes you may need to lower the chroma subsampling resolution to 4:2:2 to make such mode work over HDMI connection.
On my TV at least, using anything other than RGB Full/Limited and 4:4:4 at any bit rate up to 12 just does not work. It's doing something to the coloring and a few letters that should be a solid white when starting up the game are instead completely orange. I've also not noticed any difference at all on reflective surfaces or shadow details. It's not even possible for HDR to actually turn on without actually displaying HDR content is it? So if it's displaying on the TV, it's being displayed at 8-bit, not the full 10.
Right, but isn't HDR10 a blu-ray standard, for movies? not sure video games are using more than 8 bit color.
Up until now, they haven't. I don't even know if this game truly is or not either. UHDs are 4:2:0/10bit at 24fps anyway.
I know this thread is based on the Steam version but I'd like to chime in and say the Windows Store version is running like a dream.
I haven't had any performance issues at all and I'm using the Steam version. I had to lower the internal scaling to 0.8 since I'm forced to play it at 4K resolution, but after doing that I've been able to keep a constant 60fps, have not had a single crash and loading times are fast. However, I did actually add more ram recently. I used to only bother with 8gb, but added another 8gb when Deus Ex:MD was about to release. No stuttering at all for me.