@tarbat wrote: Q@UHDHDR wrote: @tarbat wrote: @tarbat wrote: Has anyone with this new firmware actually tested some HLG calibration test content to measure whether the luminance response curve matches the correct HLG EOTF curve? If so, what was the maximum NITS measured on a 10% window at 100% luminence? On the old non-HLG firmware, the maximum was less than 500 NITS, so nowhere near the maximum luminance the TV is capable of. Until someone does that, we have no idea if this test firmware completely fixes the HLG problem on KS TVs. And here's the calibration chart I posted back in June demonstrating just how wrong the HLG EOTF curve is on the current firmware. If someone with the new test firmware can perform the same tests, that will prove that HLG is genuinely fixed beyond just the EDID fix. Which external device were you using when you performed this test, and was there a noticeable difference when you compared the same HLG content via the internal apps vs an external device? I ask because I've been able to get HLG via HDMI from my M9500 player for several months now, and playing the same HLG content from the TV's internal app and the M9500 player, the content looks identical. I'm nearly 100% confident that the problem lies with whatever external device you are using. I did numerous tests, all described previously in this and the Sky Q / HLG threads: Sky Q YouTube app and HDFury Integral to inject the HDR infoframe. Roku Stick+ as a media player, both natively and using HDFury Integral to inject the HDR infoframe. XBOX One X media player and HDFury Integral to inject HDR infoframe. Each time using 21 grey scale (0% - 100%) on a 10% window. Measured twice with two different colorimeters and HCFR software. in each test I then repeated the exact same procedure on a Samsung MU6400 TV to prove the procedure worked on another TV. The MU6400 used a correct HLG EOTF curve, whereas the KS8000 always used an incorrect HLG EOTF curve. Conveniently the MU6400 shows HLG when receiving HLG, so I was able to verify that my tests were creating HLG content and infoframe. I believe there maybe media players that take HLG content and convert it to HDR10 before output to HDMI. I have also subsequently repeated the same tests on my current TV, a Panasonic FZ952, which displays the correct HLG EOTF curve. All these tests convinced me that the KS TVs use the wrong HLG EOTF curve on their HDMI inputs. The correct EOTF curve is used on the TVs internal apps (media player & YouTube). This also correlates with testers on the Italian forum who experienced washed out pictures when using Sky Q with HDFury Integral correcting the EDID data. It should be very simple for anyone with a colorimeter to repeat these tests on a KS TV with the new test firmware to establish if Samsung have fixed this fault in the HLG EOTF curve. EDIT: @UHDHDR, what device did you test with? And are you sure it actually outputs HLG on HDMI or does it convert HLG content to HDR10+ when outputting on HDMI? I am using the YouTube app via a Samsung M9500 blu ray player. Judging by the HLG via HDMI curve from your tests, there should be extreme over brightening that produces a very washed out image. I've experienced none of that. The image looks 100% identical to the same content via the internal app. I would be shocked if the player is converting HLG to HDR10. The player has HDMI 2.0b ports, so it can easily transmit HLG. It would have been much more difficult for Samsung to convert HLG to HDR10 than it would to simply add HLG compatibility, so it would have made no sense for them to do. Perhaps the issue lies with the way the HDFury is injecting the HDR infoframe when hooked up to the KS8000.
... View more