Originally Posted by ykjones
Thanks for your reply as we are diving into this fully this week. I'm trying to absorb as much knowledge from you all so I can be somewhat educated when talking to my calibrator & home theater installers when they come back out this week to hopefully get my 4K HDR stuff looking great. Everything has been perfect until I got 4K HDR devices (Oppo 203, PS4 Pro and Roku Ultra). 1080P and 4K (non HDR) do look awesome at the moment but I bought the Oppo 203 and the Roku Ultra for the sole purpose of being able to at least enjoy HDR (realizing it won't be on par with a native 4K projector or other displays)
Potential Cable Issue: With current Audioquest Pearl 12M cable, when I put everything to auto or anything over 10 bit, or when Deep Color is enabled with HDR, I get sparkles, "snowflake" effect on dark scenes. Word is that full spec HDR can not be passed optimally over 25 ft? I have 40 ft of cable run through ceiling to my AV rack. Could this be the result of cable struggling or not being able to handle the full bandwidth required for full spec 4K HDR? Monoprice certified premium HDMI cable arrives today along with Celerity Fiber Optic HDMI Cable arriving Wed that installers will test. I would think I shouldn't be getting any snowflake effect or sparkles if the cable is good.
My JVC DLA X550R doesn't have the BT2020 color profile: My installers will be addressing that this week. Hopefully from there, calibrator will be able to dial things in optimally for 4K HDR as the calibration he did for 4K and 1080P looks absolutely sensational. Does the BT2020 profile "unlock or open" a new profile of colors for 4K HDR? Could that be the missing link? So step one download and install the BT2020 profile via LAN cable via PC? Firmware updates are done via RS232 cable and PC?
My JVC does have the u83.2 software. Is that the latest and no further update available to address any HDR/HDMI issues?
Thanks much everyone for any insight and assistance!
The sparkles and snowflakes are almost certainly showing the Cable issue. 99.99% certainty here. Hopefully the cheaper Monoprice, or if not, the pricier Celerity, cable, will eliminate this.
You use the JVC Software, using PC or Laptop connected via Ethernet, to load the BT2020 into your Projector. This doesn't "unlock" anything as such; it just becomes available as a Color Profile selection for whichever Picture Mode (User 1 through 6) you'll use for HDR content.
Firmware updates are done via RS232, as you indicate. There was a very recent update in firmware to u83.2.4, which apparently addressed a rare problem, and wouldn't be likely to impact what you're doing here. I haven't bothered to update mine yet, as there seems nothing to gain.
You might ask your Calibrator how he will be dealing with HDR. The "Custom Curve" method is a relatively recent discovery, and it is possible he's not aware of it. This isn't the only way to get a good result (ChadB, a well-known Calibrator, apparently uses a different method, but he is universally acknowledged as one of the experts on this), but it definitely offers a clear path to a good result.