1. Is the HDMI 4k 4:2:2 YCbCr 8-bit limitation a function of HDMI 1.4?
Greg: This is a limitation of HDMI 1.4 as it just doesn't have the bandwidth for 4K. HDMI 2.0 will be required for this, but that is just now entering silicon.
2. What happens to 4k 4:4:4 RGB or YCbCr 10-bit from DisplayPort when it is downscaled internally for display on the panel at 1080 – is the bit depth retained?
Greg: All internal processing is done with 14 bit precision so the 10-bit source signal depth is maintained.
3. I'm not sure I've ever seen an industry-standard video interface that outputs DisplayPort. How would one feed the monitor 4k 10-bit when using Resolve or Avid (assuming Avid delivers resolution independence)?
Greg: They do exist, but are less common currently. BMD has had DisplayPort versions of some of their Decklinks for a while.Note that it is possible to feed 3840x2160 8-bit 4:4:4 RGB or YCbCr or 10-bit 4:2:2 YCbCr via HDMI, but you top out at 24 Hz. Theoretically it is possible to fit 10-bit 4:2:2 YCbCr at 24Hz, but it barely fits under the wall and the only way we've been able to feed this into the Z27x was via signal generators.
4. Aside from the smaller Z24x's requirement of a computer for calibration, are there any qualitative differences between the 27 and 24 that make one or the other more appropriate for critical monitoring?
Greg: The Z24x does not have custom panel so it does not have the deep off-axis blacks. In addition, it uses an 8+2 FRC panel while the Z27x is a true 10-bit panel. (Arguably it is actually 10+2 FRC, but I prefer to call it true 10-bit and got marketing to agree to not promote it as a 12-bit display. The Z27x also has a number of features that make it more suitable for grading, such as DCI aperture management, blue-only mode, 16-235 legal display option, etc.
5. Is it possible for a user to repurpose an existing x-rite i1Display Pro -- in place of the HP-branded i1 Display?
Greg: I wish it was, but X-Rite does not allow that. If you have a custom (OEM) version of the i1Display they will not allow support for the retail i1Display. We have requested this over and over - and as recently as last week - but X-Rite will not change their policy, at least not at this time.
-greg
Thanks Greg.Couple more questions:1. Is the HDMI 4k 4:2:2 YCbCr 8-bit limitation a function of HDMI 1.4?
2. What happens to 4k 4:4:4 RGB or YCbCr 10-bit from DisplayPort when it is downscaled internally for display on the panel at 1080 – is the bit depth retained?
3. I'm not sure I've ever seen an industry-standard video interface that outputs DisplayPort. How would one feed the monitor 4k 10-bit when using Resolve or Avid (assuming Avid delivers resolution independence)?
4. Aside from the smaller Z24x's requirement of a computer for calibration, are there any qualitative differences between the 27 and 24 that make one or the other more appropriate for critical monitoring?
5. Is it possible for a user to repurpose an existing x-rite i1Display Pro -- in place of the HP-branded i1 Display?
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