4 ms·

This assumes infinite color discrimination abilities, though. I'm fairly certain that after a certain point, even if there are bands, most people would be unab

This assumes infinite color discrimination abilities, though. I'm fairly certain that after a certain point, even if there are bands, most people would be unable to perceive them.

rootbear 13y ago
Good point. But the current 8 bits per pixel is definitely too few.
- ChuckMcM 13y ago
  8 bits isn't "current", if you want "current" you get 10 bit panels. If you want "better than bargain basement" you get 10 bit panels. At least where I live one of the differences between the TVs that CostCo sells and the ones that others sell are 8 bit (CostCo) vs 10 bit (others) panels.
  - rootbear 13y ago
    I understand about the panels, but what about the source material? Is color information on a blu-ray stored at 8 bits per channel or is it higher? If the source material is 8 bits per color channel, I still think you'll see banding on smooth gradients no matter how good the panel is. I should try some tests...
  - throwaway2048 13y ago
    what kind of signal are you feeding a 10 bit panel? RGB is only 8 bit so any claimed 10 bit display is only post processing at best.
    - simcop2387 13y ago
      For TV I have no idea, but for a computer, you can get 10 bit per channel output from most graphics cards these days. You still have the problem of the source material being 8bit per channel though.
    - ChuckMcM 13y ago
      That is a good question. And strangely not as straight forward as I might like. "RGB" is 8 bit but video is not encoded with RGB, it is encoded YbCbCr [1], and the conversion from Chroma space to RGB space is fractional and depends on the Kr and Kb constants. The math supports converting a YbCbCr 'pixel' into a 30 bit RGB pixel if your conversion constants allow for it. What is unclear is when quantization noise from the compression of the chroma signal shows up as bit instability in the resulting conversion cycle. [1] http://en.wikipedia.org/wiki/YCbCr http://en.wikipedia.org/wiki/YCbCr
    - nitrogen 13y ago
      Gamma correcting and color calibrating an 8-bit signal requires at least 10 bits of output accuracy to avoid noticeable banding.
  - brigade 13y ago
    Note that the panels are very unlikely to be true 10-bit; they're almost certainly 8-bit with temporal dithering. And the cheap panels are 6-bit with temporal dithering to 8-bit.

This assumes infinite color discrimination abilities, though. I'm fairly certain that after a certain point, even if there are bands, most people would be unable to perceive them.

rootbear 13y ago

Good point. But the current 8 bits per pixel is definitely too few.

ChuckMcM 13y ago
8 bits isn't "current", if you want "current" you get 10 bit panels. If you want "better than bargain basement" you get 10 bit panels. At least where I live one of the differences between the TVs that CostCo sells and the ones that others sell are 8 bit (CostCo) vs 10 bit (others) panels.
- rootbear 13y ago
  I understand about the panels, but what about the source material? Is color information on a blu-ray stored at 8 bits per channel or is it higher? If the source material is 8 bits per color channel, I still think you'll see banding on smooth gradients no matter how good the panel is. I should try some tests...
- throwaway2048 13y ago
  what kind of signal are you feeding a 10 bit panel? RGB is only 8 bit so any claimed 10 bit display is only post processing at best.
  - simcop2387 13y ago
    For TV I have no idea, but for a computer, you can get 10 bit per channel output from most graphics cards these days. You still have the problem of the source material being 8bit per channel though.
  - ChuckMcM 13y ago
    That is a good question. And strangely not as straight forward as I might like. "RGB" is 8 bit but video is not encoded with RGB, it is encoded YbCbCr [1], and the conversion from Chroma space to RGB space is fractional and depends on the Kr and Kb constants. The math supports converting a YbCbCr 'pixel' into a 30 bit RGB pixel if your conversion constants allow for it. What is unclear is when quantization noise from the compression of the chroma signal shows up as bit instability in the resulting conversion cycle. [1] http://en.wikipedia.org/wiki/YCbCr http://en.wikipedia.org/wiki/YCbCr
  - nitrogen 13y ago
    Gamma correcting and color calibrating an 8-bit signal requires at least 10 bits of output accuracy to avoid noticeable banding.
- brigade 13y ago
  Note that the panels are very unlikely to be true 10-bit; they're almost certainly 8-bit with temporal dithering. And the cheap panels are 6-bit with temporal dithering to 8-bit.