That is because DV was added with an update ^; website is OLD.
I believe the implementation of DV to be correct on Apple TV on the A8F. Each frame has an intended luminance which is contained in the metadata.
If I put the TV in Low, Medium, High or OFF - I get identical brightness of the scene on my meter. This is both in the user menus and watching video.
The TV is displaying the brightness intended by the metadata regardless of user interference. If you need to change gamma etc.. because you are not in a dark room then that is OK.
If you are watching anything on DV on the A8F in a Dark Room it is perfect - mean luminance levels around 150-200 with peaks up around normal OLED maximums 650-750 (very bright at pixel level). Looks perfect to me.
The only way to change this is to use HDR10 with some sort of dynamic tone mapping (UB820 etc..) DV is intended for the display to present the image as it was intended by the producer; which is exactly what the display is doing.
When I select "OFF" it lifts the brightness (100->150), when I select "LOW" it barely changes (avg scene level 150-200ish), when I select MID it dims slightly back down (220 -> 150) when I select high it drops (300 -> 150). If I find a high APL scene, it boost the brightness of OFF, LOW up to MID levels. I think this is correct behaviour to display the content as intended.
Last edited by Tommo53; 07-10-2019 at 02:57 AM.