AppleTV 4K dolby vision issues

26 replies

Offline

babar

Bronze

Posted May 27, 2023 at 21:21 GMT

sorry for the confusion. I'll simplify below.

I have a BST +LG77" G2 + BL18 + 19

I have an ATV box connected by way of a Balun kit to the LG.

I can play Apple purchased movies both thru the LG's built-in AppleTV app and also thru the AppleTV box which is connected by way of a Balun kit.

In the former I am getting DolbyVision. In the latter using the ATV Box I am not getting Dolby Vision.

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Guy

GoldModerator

4528 posts

Posted May 27, 2023 at 21:33 GMT
Edited May 27, 2023 at 21:51 GMT

#1656751

I can't really add much but have you worked your way through the suggestions on the Apple site here:

Location: Warwickshire, UK

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Sandyb

Bronze

2575 posts

Posted May 27, 2023 at 21:54 GMT

#1656752

Thanks - so you are using an HDMI extender (i.e what you refer to as the "Balun kit") to connect the ATV across the room to the LG?

So, if that ATV is not running through the matrix, then I dont really have any suggestions.

I'm guessing you are in the Uk / London? Who did your installation? (I'm in London myself)

Offline

babar

Bronze

17 posts

Posted May 28, 2023 at 10:24 GMT

#1656756

Hi Guys, thanks! I have gone thru the check list and commented below.

I went thru the apple checklist:

"Make sure your TV supports HDR10, HDR10+ or Dolby Vision" my LG G2 does support it

For HDR to work from external devices, the HDMI Deep Color option usually has to be set

to '4k' from the 'HDMI I have rechecked and for HDMI this is set to 4KCheck your HDMI cable
If there’s an issue with your HDMI cable, you may see a message on your TV that says your HDMI cable may be having trouble maintaining a stable connection. If your Apple TV 4K is connected to a 4K compatible TV, you can run a two-minute test to check your HDMI cable connection. Go to Settings > Video and Audio and select Check HDMI Connection.

I did not find the option for check HDMI connection. I did change it from YbYGYr to RGB High. This reflected in the OLED77G2 shifting to HDR from SDR. In the apple resolution options I switched to 1080p HDR so now getting better than 1080p SDR.

Check HDMI Cable for DolbyVision certified

there isn't enough length to go thru the whole cable coming from the walll but in the 0.75m or so I saw there is nothing written.

the title reads "AppleTV 4K dolby vision issues" ; are you seeing something different?

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Millemis

Bronze

15988 posts

Posted May 28, 2023 at 12:30 GMT
Edited May 28, 2023 at 03:00 GMT

#1656761

There are lots of videos out there how to set your ATV4K in order to get the best video quality.
This is an example of how these look:

As I - now - understand it, your ATV is located in a distant room.
(This has nothing to do with the matrix, you also have)
Therefore you use the extender kit (Balun…).
It might be that this does not support the required bandwith for these settings.

Best thing to do would be to relocate the ATV - if you possibly can - and plug it directly into the LG or the BST (with PUC) using a proper HDMI cable with at least 18 Gigabits per second speed.

MM

Location: Flensborg————Danmark

Offline

Guy

GoldModerator

4528 posts

Posted May 28, 2023 at 12:39 GMT

#1656762

Location: Warwickshire, UK

My B&O Icons:

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AppleTV 4K dolby vision issues

babar

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