#2733
Post
by SamuriHL » Tue Jul 28, 2020 3:18 am
Since I had the Spears and Munsil disc out and put the FEL MKV rip out for the shield, I decided to run a few scene comparisons. Only a few just for spot checking, nothing in depth.
First some observations about my setup. I'm running a C8 that has the service menu white point calibrated to D65. I did NOT calibrate the DV modes, however, they ARE using the SM white point adjustment. Given how accurate the C8 is out of the box, this is about as close to reference as you're going to get with these displays, especially when driving content that is 10k nits. Which brings me to my next observation. At 10k nits, we're obviously well into the aggressively tone mapped curve of the C8. Given that I push about 800 nits max out of that thing, obviously it's HIGHLY tone mapped. I use this scene as a torture test for madvr dynamic tone mapping for HDR. I've not really messed with the Dolby Vision version of it other than to do a quick comparison with HDR. On the shield, I did NOT apply the HD Fury change. This is important to note as you'll soon see.
I was looking for specific artifacts here. The red tinting I was talking about tends to happen with partially white backgrounds. Therefore, I limited my testing to 3 scenes and compared the UB820 to the shield. The shield was set to 2160 res, 23.976Hz refresh rate, 12 bit YCbCr output. The UB820 is set similarly. With that out of the way....
I don't have specific time codes for everything. I know 2 of them off the top of my head. 32 seconds and 45 seconds. The 3 scenes are the fence with snow, the horses in the snow, and the deer.
The fence with snow, I usually look at the detail in the snow itself and along the fence posts. I detected no artifacts in this scene in a direct comparison with the UB820. Color representation was accurate. No red push or tint of any kind was detected.
The horse scene is notoriously nasty on tone mapping algorithms. It was designed that way. I focus on the snow in front of the horses to see the detail within the snow. The horses themselves should be quite details even with all the snow noise around them. And the background should not be washed out, even though it is blurry due to the snow. I detected no artifacts in this scene. Color representation was accurate. No red push or tint of any kind was detected.
The deer is a fun one. I like looking at his nose cause it torture tests your black levels. And his antlers have quite a bit of detail. The detail in his fur around his face is also nice to check out. I'm sure you've detected a theme here. I detected no artifacts in this scene. Color representation was accurate. No red push or tine of any kind was detected.
To be clear, I was not pixel peeping here. But these are scenes I'm excruciatingly familiar with from my madvr tone mapping testing. The FEL MKV gave the exact same picture as my UB820 on these particular scenes. We're going to need to do a way more in depth comparison, obviously, but, the spot check passed. Without any HD Fury fixes. Clearly whatever issue we have is not impacting ALL video.
