AppleTV 4K 4:4:4 Chroma?

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AppleTV 4K 4:4:4 Chroma?

Apple TV 4K plays 4K UHD content at the original 4K @ 24hz frame rate with HDR10 dynamic range, but only does so at 4:2:2 Chroma (12-bit), and wont go to 4:4:4. Is this a bug? The HDMI 2.0 spec provides for 4K24 4:4:4. My BlueRay player supports 4K24 at 4:2:2 (12-bit) or 4:4:4 (10-bit), user selectable, so why doesn't AppleTV support this part of the HDMI 2.0 spec?

Note that (as I understand it) the original content is subsampled at 4:2:0 (BluRay and streaming), but of course 4K24 4:2:0 is not part of the HDMI 2.0 spec, so the choices are 4:2:2 or 4:4:4.

Anybody have any idea whats up with this?

https://www.hdmi.org/manufacturer/hdmi_2_0/hdmi_2_0_faq.aspx

Posted on Jan 19, 2018 12:24 PM

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Answer 1

Feb 16, 2018 6:31 PM in response to ModernMan1

I was able to get 4:4:4 yesterday. In settings it showed : "current setting as 2:2:2:, would you like to try 4:4:4?". It also stated that the new setting would include deep colors. I selected and got the 4:4:4. The results were astounding. The colors were much more intense and the picture was magnificent. Unfortunately, I rerouted some of the HDMI cables today and the chroma was reset to 2.0. I've only have been able to get back to 2:2:2. Will keep on trying.

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