2018-09-25, 00:01
(2018-09-24, 22:52)treboR2Robert Wrote: 1) When I read about this 8bit to 10bit dithering on s905x it said that it was a hardware limitation. Reading through this thread last night you seem to be saying that this is not the case and it is a software limitation ?
2) Also you have said the CoreELEC builds for s905x and the s912 both suffer from this ?
3) Do any of the s905x boxes have a hardware limitation preventing them from passing through true 10 bit video ?
4) What about s905d and s905w?
5) If the s912 does not have this limitation why does the s912 CoreELEC build have a problem ?
6) The original vero 4k has a s905x right ? Does the vero 4k+ have a s905d ?
7) do the latest builds of libreelec based on Kodi Leia only support s905x and not s912 ? will they ever support s912? and how about s905d and s905w ?
8) I mentioned the stuff about terminiator 2 and the dim picture because I also thought it didn't look anywhere near as clear or sharp on coreelec as my tvs internal player. Could this be dithering ?
9) What is dithering exactly ? are 8bit to 10bit even related to dithering ?
1) True hardware limitation on SoC system design is limited. You can update some or all of the SoC. It is up to the vendor what part of the SoC can be updated.
2) I may have to check my notes to say definitely, but I do remember that the CoreELEC builds that I tried on S905X and S912 didn't have true 10-bit output.
3) See 1.
4) I don't know. I haven't tested any device with these SoCs.
5) As I explained in 1. This is likely due to the old kernel being used.
6) Correct.
7) I don't have the answer to this.
8) No this is not due to dithering. It is likely due to incorrect mastering display luminance in the HDR10 metadata.
9) Dithering is basically an error diffusion technique. It is generally employed when changing the bit depth of audio/video (e.g. going from 10-bit to 8-bit video color depth or 24-bit to 16-bit audio bit depth).