Feedback [PSA] The X9S outputs wrong color levels

Discussion in 'ZIDOO X9S' started by n_p, May 31, 2017.

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  1. boblo

    boblo Member

    Wow, what a excessively technical answer for me! :eek:

    It seems this issue should be taken seriously by Zidoo and an official response is mandatory here soon. They cannot claim it's a minor bug because X9S/X10 are media players and video is not affected. Competitors Himedia/Egreat (with HiSilicon SoC) don't have this issue and they are in the same category.
     
  2. nikos_a

    nikos_a Active Member

    It would be interesting to see measurements from another RTD1295 box...
     
  3. n_p

    n_p Active Member

    I'm being so specific, because color science currently is in a bit of a rough spot, where its not an entirely sure thing, if and when a certain person does see a color match or not (the color metamerism failure issue). But thats an issue on the reproduction side, not in signal encoding. So when your video says 15,15,15 and your video player outputs 19,25,38 (still all digitally), its not so much a color science ("how will I perceive the color") issue, its a programming error (the math used is not correct).

    So instead of saying yes, you will see the color error. I'm hedging bets. ;) According to all current standards in color science, most people will see the color difference clearly, as the margins colors are shifted by are quite big. That said, your math is supposed to be correct almost regardless, because video distribution is dependent on it.
     
  4. boblo

    boblo Member

    The most direct competitor is Zappiti 4K HDR, with same SoC and specs (including the HDMI Input). It has an image processing engine called 'Magic Pixel 2'. Some people like it, other hate it. The problem is it cannot be deactivated so it's a risky business (I've read comments about Magic Pixel that claim is not suitable for old SD videos).

    Still no official word on this? Then I'll have to change my mind and go with another media center...
     
  5. nikos_a

    nikos_a Active Member

    Most direct is probably the Beelink SEA I. As I said, I am suspicious that it is not Zidoo related but rather, Realtek-related. This is why I would like to see similar test with another 1295 box.
     
  6. mirror

    mirror Well-Known Member SUPER Administrator Zidoo TECH Supporter

    There is no so-called ”Magic Pixel“ in realtek SDK,If someone tells you It has, it must be false.
    All image quality optimizations are related to the underlying decoding.
    No one can change it, except chip factory!!
     
  7. boblo

    boblo Member

    @mirror, thanks for you reply. That's not the problem, I'm not interested in Zappiti players, but in Zidoo players.

    The issue is that @n_p has discovered a bug in color reproduction when NOT playing video. Please see THIS POST.

    I'd like tech support confirm this issue.

    Many thanks, indeed.
     
  8. mirror

    mirror Well-Known Member SUPER Administrator Zidoo TECH Supporter

    Right answer! Please remember it is a 'Media player'
     
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