Your TV likely has a completely different set of stored settings for HDR content. You almost certainly need to fine tune things to get that looking better.
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Turning 4K/HDR/60hz on makes screen dim
- Thread starter SCMedic
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Your TV likely has a completely different set of stored settings for HDR content. You almost certainly need to fine tune things to get that looking better.
Initially when connecting 4K ATV to my receiver to pass to Samsung 9800 could not get HDR to work. Screen would go black and I would have to reset atv. Checked settings in ATV and was getting 4K sdr.
Was reading that I had to turn UHD color on for the input I was using. When I did that was getting HDR but also the dimming on other channels and not happy with the 4K quality
Turned on picture mode HDR plus and that appears to have done the trick and eliminated the dimming. It appears by doing this the TV knows when there is hdr cone t so you do not need to adjust backlighting. Etc
HDR+ is fake HDR upscaling of SDR content. Turning it on will make the dim picture look better, but it's not processing the HDR-signal corrctly. Try adding dynamic contrast and smart LED in the settings instead.
The problem is that the ATV is constantly telling the TV that it’s getting an HDR signal, even when it’s SDR content. So the SDR content comes out looking whack. The Netflix app on Xbox One S had this problem as well. If you played an HDR movie, it would stay in “HDR mode” even if you went back and chose something in SDR.
Mine comes Oct. 10th or something in that neighborhood; it was a 64BG ordered morning of launch. I couldn't believe it was that popular, or limited in supply to that extent.
Anyway, with ios getting a .01 release today, maybe tv iOS will be "fixed" by the time I get it too.
Anyway, with ios getting a .01 release today, maybe tv iOS will be "fixed" by the time I get it too.
Maybe I’m wrong, but I think the Apple TV is trying to upscale it?
Either way, it’s doing a better job, than my Samsung’s hdr+ upscaler
HDR content on the KS8000 must be played with the backlight at 20. It's supposed to change to 20 automatically, but there's a bug (supposedly being worked on) where it doesn't automatically switch in Game Mode. If you're in Game Mode, you must manually increase it to 20, then decrease it when SDR content is being played.
If your Apple TV is always in HDR mode, your backlight should always be at 20 on a KS8000.
HDR mode is not just about backlight intensity. Firstly, it has a totally different gamma curve, secondly, it has a different color model and thirdly, it uses 10 bits per pixel instead of classic 8bpp of SDR mode. That is a huge difference in whole processing chain.
Same on my LG B6V 65" OLED. Everything is more dim!
And I also got a problem that the Apple TV sends some kind of faulty signal that makes colors all wonky... might be defective HDMI-port or such
And I also got a problem that the Apple TV sends some kind of faulty signal that makes colors all wonky... might be defective HDMI-port or such
Tried switching between SDR and HDR, both on 4K and 60hz, and its obvious how much brighter the menus etc are on SDR.
Movies etc on the other hand look equal (with HDR being a tag better of course) while watching Kong Island in 4K from iTunes. When watching Netflix SDR is notably brighter....
Movies etc on the other hand look equal (with HDR being a tag better of course) while watching Kong Island in 4K from iTunes. When watching Netflix SDR is notably brighter....
It is your TV or Display's "picture modes" which are changing and causing the effect you see.
Don't be so surprised if the TV manufacturers release FW updates to address these.
Very aware of this, the TV switches to HDR mode when HDR is enabled on the Apple TV. But the issue is that the screen is much more dim in the menus och during some content, which I find weird...
1. This isn't just a Samsung Problem. My TV recently died and I have bought a TCL 55p605. Since it's a 4K w/ Dolby Vision/HDR10 and since for years I've used the Apple TV as my primary device I decided to upgrade.
2. With Dolby Vision or HDR10 enabled the screen is dim. I still have my old 4th gen Apple TV and toggling between the too is frustrating.
3. When watching stuff in Dolby Vision or HDR it looks maybe a little dim, but great. Everything else is not good. Pretty clear it's an upscaling issue. True HDR is handled well, SDR stuff winds up muted and dim.
So far the fixes for this are limited to running it in 4K SDR. Pretty frustrating to pay for a new box and realize 95% of what watch (NETFLIX, HULU, PS VUE, HBO NOW) all look way better on the old one.
2. With Dolby Vision or HDR10 enabled the screen is dim. I still have my old 4th gen Apple TV and toggling between the too is frustrating.
3. When watching stuff in Dolby Vision or HDR it looks maybe a little dim, but great. Everything else is not good. Pretty clear it's an upscaling issue. True HDR is handled well, SDR stuff winds up muted and dim.
So far the fixes for this are limited to running it in 4K SDR. Pretty frustrating to pay for a new box and realize 95% of what watch (NETFLIX, HULU, PS VUE, HBO NOW) all look way better on the old one.
I found the fix for this, at least for my TCL 55P607.
When you originally set up you are given the choice between 4-2-0 and 4-2-2. 4-2-0 is the default and it warns you off 4-2-2. I selected the default. Then the option to change this setting disappears. When I selected "Reset All Video Settings", I was able to start again and chose 4-2-2 and it has made a world of difference. Looks great now and I'm not going to have to burn everything to the ground.
YMMV; GL.
I am joining the chorus on the KS 8000 folks on HDR, it looks really DIM. If you go with the 4K SDR setting on the ATV your picture will look fine. I almost returned it but 4k without HDr is still better than 1080p.
KS9500 TV here and spent two days trying to get the best picture on the ATV 4K. Ended up returning it and going back to ATV 4th gen. Both my wife and I thought the 4th gen provided a much better picture letting the KS9500 do the upscaling than what the ATV 4K could do. Hoping that either Apple puts a fix in or Samsung does something with the firmware. Will sit back and watch from the sidelines for now.
Can it be because HDR based on PQ (like DV and HDR10 are), requires a really controlled and rather dim viewing environment? Remember, these HDR modes are about fixed brightness values, based solely on the numeric value of the pixel. That means, if pixel value reads 769, screen is supposed to light it up at 1000 nits. End of story. No 'if'-s or 'but'-s. At all times and irrespective of ambient brightness. (Unless it can not reach that brightness level, in which case it will roll off / clip all higher intensity pixels).
All details are explained here (section titled 'ABSOLUTE VS. RELATIVE' and onwards): https://www.lightillusion.com/uhdtv.html
That means, unless you are watching in a dark home cinema room, both your HDR set and appleTV might actually be performing exactly to ST2084 HDR specifications.lightillusion.com said:
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I've got the same TV, same issue. Was this on the TV or the aTV4k?
Edit: Nevermind, found it, it was on the aTV4k. Interestingly, I noticed the same thing. You can access this setting on 4K HDR, but not Dolby Vision. I don't know if it applies to both, of if this is just confirmation bias on my part.
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I did the same thing - I switched the Apple TV to 4K SDR for now.
The only thing that looks good with 4k HDR set is native HDR content. 4K Dolby Vision movies and 4K SDR content look very dim/dark. I'm hoping Apple fixes this with a software update.
This appears to be an app problem that needs to be fixed on a per-app basis by the app's developers. I use Playstation Vue through the ATV and while all the content is SDR, it is not using the new APIs for matching format and dynamic range, in other words it is not respecting those settings and is not specifically telling the ATV to switch to SDR mode when it plays content. So that's something Sony needs to fix but I'm not holding my breath because they are pretty bad with software.
Meanwhile yeah, the only realistic solution is to set the ATV default format to 4K SDR. This works and iTunes Movies and Netflix at least will correctly switch to the proper HDR mode for the content they play, it just means you aren't seeing the nice new 4K screensavers in all their Dolby Vision glory if your tv supports it (they look "OK" in SDR, but they are really stunning in DV — at least on OLED). So that's a shame, hopefully Sony and other apps get the fix out soon so we don't have to use that hack.