2018-06-05, 16:09
the problem is visible with all UHD HDR movie, the problem is known for several months by Zidoo team and mirror know the problem for a long time too
(2018-06-05, 15:27)hdmkv Wrote: You mean display/projector info? If so, that’s irrelevant or won’t reveal anything about the banding issue. The signal/resolution is fine.You also get color banding issues when bit depths are not tunneled thru from the source video via HDMI to the display properly.
Banding occurs always with 4K and HDR movies; it’s just more pronounced/visible in scenes with skies... like within the first few minutes of ‘The Martian’ before the storm sequence, or the first few minutes of ‘The Revenant’ with DiCaprio’s wife and kid.
(2018-06-06, 04:13)wrxtasy Wrote: An example is the AMLogic S905X / S905D devices that do 10bit > 8bit < 10bit transformations via Linux Kernel dithering and rounding.There is no difference between Vero 4K and the LibreELEC nightlies on a cheap S905X. CoreELEC and community Amlogic LE have bad dithering. I am not sure whether there are 10-bit >8-bit>10-bit conversions in the newer or patched kernel for S905X devices. The output has 1-bit accuracy. It is hard to get that if there is 10-bit to 8-bit dithering.
If done properly like on the S905X Vero 4K you do not get major color banding issues.
(2018-06-08, 13:09)OlivierQC Wrote: There is banding/dithering with the FW 1.4.12 and since that, i use YcBcR 4.4.4 AUTO/12Bit/limited with my X9S/10 and the PQ is good (no banding, etc...) with my X930C (10Bit panel), for now the X10 with the FW 2.0.25 is my favorite choice.I'm not seeing banding either w/limited, but as playback for 23.976 UHD is 12-bit 4:4:4, I get light (but annoying) sparklies in the picture. Will try a shorter 18Gbps 'certified' cable this weekend. For now, I prefer nVidia Shield & Kodi 18 Alpha for UHD playback.
(2018-06-05, 15:27)hdmkv Wrote: You mean display/projector info? If so, that’s irrelevant or won’t reveal anything about the banding issue. The signal/resolution is fine.I just want to know how to display that kind of info on my TV, I'm not sure if my TV can handle HDR or not, the picture looks fine not dull or anything but there's no such info showing HDR
Banding occurs always with 4K and HDR movies; it’s just more pronounced/visible in scenes with skies... like within the first few minutes of ‘The Martian’ before the storm sequence, or the first few minutes of ‘The Revenant’ with DiCaprio’s wife and kid.