Apple TV 4K with Denon AVC x3800 dolby vision issues

It seems that the AVR has some settings that limit the bandwidth.

The TV is listed as having 2x HDMI 2.1 (48 Gbps) [ports 1, 2] and 2x HDMI 2.0 (18 Gbps) [ports 3, 4]. So it matters which ports you use on TV. Connect the AVR to HDMI 2 port on the TV for (e)ARC. The TV may need HDMI configuration per port. See its manual.

The AVR is listed having all HDMI 2.1 ports, but that may also need configuration per port. See its manual.

Set Apple TV for HDMI video output in YCbCr with chroma 4:2:0, especially if HDMI 2.0 ports are used anywhere in the chain. This does not diminish the video quality as all delivery format video is encoded with chroma 4:2:0 anyway.

I have exactly the same issue.

Apple TV 4K 128gb, latest firmware

denon x3800, latest firmware

xiaomi TV

direct connection from Apple TV to my Xiaomi : Dolby Vision is possible

via the denon av receiver: unfortunately does not work.

regards from Germany

Dietmar

I figured out. I have a formovie theater ust 4k , Denon avr-3800x receiver and apple tv 4k 3rd gen.

K wasn't getting the 4k Dolby vision 60htz. Reading the blogs, figured out that was some software/configuration in HDMI port not letting have the full 2.1 48gbts speed of the port.

Did everything, change HDMI cables and tried every configuration in Denon and apple.

Now finally I found the configuration missing in the projector formovie. Force the HDMI port to be 2.1. https://www.formovie.com/blogs/manual/how-to-enable-hdmi-source-2-0-2-1-mode

It is working now.

Hope that helps.

I suspect @Urquhart1244 was on the right track pointing you at verifying the HDMI port-specific settings on the Denon AVR. For example, my Sony soundbar has (2) HDMI inputs, both capable of full-on HDMI v2.1 HDR10+/DolbyVision throughput, but both defaulting to a slower HDMI 2.0 mode. It even posts a warning to only set enhanced mode for ports with capable devices, like the ATV4K, attached.

More often, we hear of Denon AVRs choking on the ATV4K's delivery of Dolby Atmos-encoded audio as uncompressed multichannel LPCM (presumably along with a DolbyVision-level video stream passthrough load).

I face the same issue as well. Strugling as well with the control of Apple TV from my Sony Bravia XR.

Its seems easy that manufactures are pushing always to the other side. Denon pushing to Apple, Apple pushing back to Denon.

How about the standards?

Check & replace all HDMI cables longer than 1m. Might fix, but I would keep even if it doesn’t. 4K content is like 5G WiFi - very sensitive to distances plus deterioration in quality won’t always be obvious to the human eye.

I use 1 m High speed hdmi cable.

my issue is the I cannot control the Apple TV from the tv remote control.

i also have another device (formular z11 Pro) and I can control everything from the tv remote.

i don’t understand where the problem coming from.

I even reset the Apple TV but still cannot control, with exception of the volume.

Any ideas what can I do in Apple TV to accept control from TV remot?

I assume that you've verified that both the Denon and the Xiaomi have the (specific and well-chosen) HDMI ports involved fully-enabled for 'enhanced color mode' or whatever they call it for HDR10+, DolbyVision, etc. Sometimes these essential options are obscurely placed under various settings menus, and I know many HDMI-switching AVRs and Soundbars say to leave this enhanced option off unless such a device is connected to that port.

Then, unplug everything from power. Power up the AVR and TV before plugging in the ATV4K. Can you get the TV turned on in DolbyVision mode with the Denon's on-screen menu overlaying that, independent of the ATV4K?

Then plug-in the ATV4K - I expect the Denon will auto-switch input to the newly powered-on ATV4K (if not switch over) and go to Settings > Video and Audio > [VIDEO] Reset Video! The ATV4K should try to negotiate the best picture that it and the connected TV can handle. Then, turn on the enhanced options there on that settings screen, maybe scroll down to the calibration trick with a modern iPhone, so that the ATV4K's default home screen is the best display mode your TV can accept. My advice is you let the ATV4K do all the video rendering/transcoding to 4K DolbyVision and leave "Match Content" OFF.

If that fancy AVR and TV let you customize settings for the ATV4K's input, try turning OFF any "TruMotion"-like video processing by the TV and AVR. You basically want a bright dolbyvision-savvy monitor that shows off the ATV4K's video rendering chops. We'll assume that your Denon can handle the heaviest Dolby Atmos soundtracks that the ATV4K can throw at it. You'll find the ATV4K decodes all the Atmos channels and sends it along to the AVR as uncompressed LPCM audio tracks with Atmos metadata - earlier Denon AVRs suffered "audio dropouts" intermittently on Atmos soundtracks with ATV4K - don't know if that's been resolved.

bridgendmac wrote:

1. Hi all,

Thank you for all your responses. Can I just say my problem of not outputting Dolby Vision is now resolved. The issue was with my TV. If anyone has the new Philips 908 and is struggling, go into HDMI settings and toggle between two out of four options and voila the Dolby Vision is back with all correct sound outputs.

I will try and answer all queries here.

My hdmi cable from my Philips 908 77 inch to Denon X3800 is Monster M3000 5m cable. The cable from Apple TV 4K 128gb latest generation to Denon is the same Monster cable 2m.

2. I have not tried using the TV remote to operate apple TV as I use harmony one remote which works with absolutely everything. But my Philips TV remote works with the apple tv.

Thanks for the update. Had you previously fed DolbyVision content through your Denon to the Philips from another device, or was the ATV4K your first attempt?

How long are the HDMI cables?