Originally Posted by DrA
my appleTV 4K is connected to HDMI 3 with an expensive cable I bought from their store. It is very thin and I don't know what speed it supports but in TV menu it reads HDR in Action menu>Picture adjustments on right top.
My DirecTV Genie client reciever is connected to input 2 with old, thick cable and 4K channels 104, 105 and 106 make the HDR to turn on the same TV menu. Do I need a new HDMI cable? Is this a reliable test for determining cable speed?
Also how do you know if the original source is HDR in apple TV? If I buy a 4K player I will be limited to 30fps on inputs 1 &4?
I do not have an Apple TV (waiting to see if Roku/Nvidia will just push Dolby Vision to their devices or issue new hardware this year) so I can't confirm how the Apple TV issues HDR media in the UI. On my Roku, all the streaming apps I use (Amazon, Netflix, YouTube) all display 'UHD' or 'HDR' specifically to note if it has that available, and of course the 930E displays HDR in the picture adjustments menu (along with a darker gray color motif) once it detects HDR10 is being passed.
For the 930E, as far as the manual displays, HDMI 2 and HDMI 3 are the only two HDMI inputs that, when set to Enhanced, support the full 18Gbps bandwidth of HDMI 2.0.
Technically, you can pass 4K video at 60hz over non-enhanced bandwidth (10 Gbps), but only at 8-bit color. This isn't listed in Sony's section of the manual, so who knows whether it is actually supported or whether Sony just assumes you wouldn't do it: http://helpguide.sony.net/tv/eusltn1...3.html?hl=2160
Now, my Roku's display setup, it specifically lists the different modes that it can push ([email protected]
, [email protected]
, [email protected]
HDR, [email protected]
HDR, etc...), the PS4 Pro/X1X will display the same.
If your Apple TV specifically lists something similar (4K resolution, 60Hz, and HDR) that it is using for your TV, then you know your cable is good, since this mode uses almost the full HDMI 2.0 bandwidth (17.82Gbps.)
The PS4 Pro, when it's not playing an HDR game, will switch over to use the full HDMI bandwidth to push full chroma instead, so it will display 4K resolution, 60hz, and RGB (4:4:4) chroma subsampling, which also uses up the full bandwidth (17.82Gbps.) However, once you switch into a game that uses HDR, it drops from full RGB chroma subsampling to YUV422 (or YUV420 on some other TVs) to instead use the additional bandwidth for HDR support. Any of these modes will confirm your setup and your cable is correct.