START HERE - Pick the Right Kodi Box (updated January 2020)
(2018-06-11, 05:44)wrxtasy Wrote:
(2018-06-10, 19:00)wesk05 Wrote:
(2018-06-10, 16:59)solamnic Wrote: I m sorry but its NOT thats why i sold my Shield and bought an Apple Tv...
Have you checked Apple TV and NVidia Shield playing back 4K content in Kodi on the same TV side by side ? 
This doesn't apply if you are playing BT.2020 HDR content and the output is BT.709 SDR.   
Getting away from all the Nerd speak, the core problem all along has been the Shield has had issues with colorspace conversion when switching from viewing BT.2020 (mostly used for 4K HDR) to BT.709 SDR  

You can't escape nerd speak...

What wesk05 (who knows more about HDR and SDR than most here) was saying - I think - is that the nVidia Shield TV when configured for UHD Rec 2020 output - will output very high quality UHD HDR Rec 2020 content correctly. There are question marks about how accurately the various aspects of HDR metadata are transferred on some platforms (with some outputting the same fixed metadata for all content - ignoring primaries, peak and average light levels etc.)

However if you configure the Shield TV for Rec 709 output and then play Rec 2020 HDR content - the output is not perfect. (And some people incorrectly configure their Shield for 709 output as its a user choice)
Quote:From my understanding SDR color output would be oversaturated unless you dug deep into settings all the time and manually set the correct SDR colorspace when viewing mixed HDR and then SDR content. Which ends up being a right royal PITA for long term usage for the average user.
The issue you are mentioning here is that the nVidia Shield TV outputs at a fixed colour gamut (aka colour space) - either Rec 709 or Rec 2020 (which are based on two different RGB colour primaries) - based on the configuration chosen in settings, and the Shield TV doesn't switch colour gamut/space on a case-by-case basis. It instead uses gamut conversion techniques to convert Rec 709 sources for display in a Rec 2020 colour space. In Nougat this was not perfect (but better than some other colour gamut/space conversions) - and there are suggestions that this will improve again in Oreo. The colour gamut/space conversion has to happen somewhere - the TV's primaries don't change when the HDMI format changes (the TV has to do a gamut conversion)

Ultimately I suspect conversion will become an accepted approach. It certainly may make GUIs easier to handle - and stuff like photos.
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Messages In This Thread
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Thanks for the Help! - by jmc15john - 2016-11-09, 16:44
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RE: START HERE - Pick the Right Kodi Box (updated May 2018) - by noggin - 2018-06-14, 00:20