4K signal over Ultrastudio 4K 2 and LG 31MU97

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Francesco Parrella

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4K signal over Ultrastudio 4K 2 and LG 31MU97

PostMon Nov 27, 2017 3:46 pm

Hi,

i am thinking to set up this configuration in order to edit and monitoring a 4K signal:

CPU (macbook pro or Imac Pro) -->>Ultrastudio 4K (via Tunderbolt 2)-->>LG 31MU97 (Via HDMI 1.4)

does anyone have some info or experiences about this setting?
Is the HDMI 1.4 of Ultrastudio support output in real4K and/or is the LG able to accept the signal from the Ultrastudio in 4K via HDMI 1.4?

Thank you very much for any advice.
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Andrew Kolakowski

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Re: 4K signal over Ultrastudio 4K 2 and LG 31MU97

PostMon Nov 27, 2017 4:46 pm

UHD will work, but not 50/60p. 4K DCI should work for 24p, maybe 25p.
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Francesco Parrella

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Re: 4K signal over Ultrastudio 4K 2 and LG 31MU97

PostTue Nov 28, 2017 12:44 am

Andrew Kolakowski wrote:UHD will work, but not 50/60p. 4K DCI should work for 24p, maybe 25p.


Thank you for your reply Andrew:

i've found this info from Ultrastudio 4K2 user manual on the web:

1x HDMI type A connector including 3D frame packing, Ultra HD, and 4K support
4K format supported:
DCI 4K 4:2:2 by HDMI


but

HDMI format support:
3840x2160p/23.98, 3840x2160p/24, 3840x2160p/25, 3840x2160p29.97, 3840x2160p30, 4096x2160p23.98, 4096x2160p24


seems that, as you said, US4K2 support 4K DCI over HDMI but only if its p23.98 and p24

i've seen also that over SDI it support:

4K Format Support SDI:
3840x2160p/23.98, 3840x2160p/24, 3840x2160p/25, 3840x2160p29.97, 3840x2160p30, 3840x2160p50, 3840x2160p59.94, 3840x2160p60, 4096x2160p23.98, 4096x2160p24, 4096x2160p25, 4096x2160p29.97, 4096x2160p30, 4096x2160p50, 4096x2160p59.94, 4096x2160p60


and so: to get 4K DCI at 25p into LG monitor could be an option (or the only option) to go from ultra studio to monitor with an SDI-->HDMI 4K(DCI) converter ?

thanks again !
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Andrew Kolakowski

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Re: 4K signal over Ultrastudio 4K 2 and LG 31MU97

PostTue Nov 28, 2017 1:02 am

4K at 25p only may work- you simply need to try (it works only with some monitors). This is problematic option as it seams to be not in HDMI spec.
4K 50/60p 4:4:4 10bit is outside HDMI 2.0 bandwidth. It only works with DP 1.2, but getting e.g. dual SDI 12G converted to DP 1.2 costs fortune atm. If you happy with 4K 4:2:2 10bit then there is Apantac converter which takes 4x3G SDI and converts into DP 1.2 for up to 60p 4K.
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Francesco Parrella

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Re: 4K signal over Ultrastudio 4K 2 and LG 31MU97

PostWed Nov 29, 2017 11:12 pm

Thanks for reply, very appreciated infos.

But sorry i miss something... i can output from Ultrastudio 4K with 4X3G SDI?
Is the single-link 6G-SDI which support DCI / UHD 4K 4:2:2 splittable in 4X3G SDI connection for the Apantac Micro 4K-DP ?

Actually i am decided to renovate (or maybe is better to say build up :D ) a Full HD/4k editing/grading "suite" and my budget gets me to the config i mentioned in first post even because my output is still mostly Full HD, so monitoring 4K UHD from Resolve and 4K DCI from graphic card is enought at the moment, thinking that it could be improved in the future if needed.
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Andrew Kolakowski

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Re: 4K signal over Ultrastudio 4K 2 and LG 31MU97

PostWed Nov 29, 2017 11:51 pm

If you find splitter :)
Most people run Apantac with Decklink 4K Extreme with its additional 4x3G SDI board.
What is missing on the market is "serious" SDI (6G/12G) to DP 1.2 converter. This would be an answer to so many problems. I think the reason is that currently there is only 1 (or definitely not many) chipset which allow to build such a device.
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Francesco Parrella

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Re: 4K signal over Ultrastudio 4K 2 and LG 31MU97

PostSun Dec 03, 2017 7:51 pm

Andrew Kolakowski wrote:If you find splitter :)
Most people run Apantac with Decklink 4K Extreme with its additional 4x3G SDI board.
What is missing on the market is "serious" SDI (6G/12G) to DP 1.2 converter. This would be an answer to so many problems. I think the reason is that currently there is only 1 (or definitely not many) chipset which allow to build such a device.


Understood :)
but why BM do not consider to make a I/O card with DP monitor connection? Or maybe they are considering it but is technically not so simple...

get the Decklink means to build up a different CPU which would be also an option (maybe the most reasonable in terms of Q/P) but i don't want to go for Windows, and i am a bit afraid of Hackintosh (for many reasons) ...Linus allure me but i don't know much about that, sincerely i am strongly considering the new iMac Pro and this put Decklink out of choice.
Anyway i still have a bit of time before my decision for the monitor and generally for the system.. and at the moment options are enlarging more than reducing... :D but its ok, is better thinking now than thinking when money are already gone....
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Andrew Kolakowski

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Re: 4K signal over Ultrastudio 4K 2 and LG 31MU97

PostSun Dec 03, 2017 9:24 pm

Francesco Parrella wrote:Understood :)
but why BM do not consider to make a I/O card with DP monitor connection? Or maybe they are considering it but is technically not so simple...


I don't think its any more difficult than making it with HDMI/SDI (not sure about licensing costs). I think main reason is cable length- such a card could be strictly used only for short connections (although even this can be "solved" by use of fibre based converters). From other hand this is exactly what many "home" Resolve users need. They don't need SDI at all.
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Xtreemtec

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Re: 4K signal over Ultrastudio 4K 2 and LG 31MU97

PostMon Dec 04, 2017 10:59 am

Because of licensing DP and because DP is not a broadcast standard at all..

But i don't get why most monitor manufacturers of 4K screens limit themselfs to DP and not going for the new HDMI 4K standard ;)
Daniel Wittenaar .:: Xtreemtec Media Productions ::. -= www.xtreemtec.nl =-
4K OBV, ATEM TVS HD, Production Studio 4K, 2M/E Broadcast Studio 4K, Hyperdeck Studio, SONY FS7 4K, JVC HM700 Full HD Camera
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Andrew Kolakowski

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Re: 4K signal over Ultrastudio 4K 2 and LG 31MU97

PostMon Dec 04, 2017 11:27 am

Xtreemtec wrote:... and because DP is not a broadcast standard at all..


This means nothing for home user.
It's as good as SDI for short connections- it's digital world:) It's even better than SDI as it offers easy/cheap solution for 4K 50/60p monitoring at 4:4:4. SDI can't even do it without dual 12G link which is basically non-existent on monitor side.
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Xtreemtec

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Re: 4K signal over Ultrastudio 4K 2 and LG 31MU97

PostMon Dec 04, 2017 11:51 am

But who said that BMD develops hardware for homeusers? :lol: They develop for the broadcast market.. ;)
Daniel Wittenaar .:: Xtreemtec Media Productions ::. -= www.xtreemtec.nl =-
4K OBV, ATEM TVS HD, Production Studio 4K, 2M/E Broadcast Studio 4K, Hyperdeck Studio, SONY FS7 4K, JVC HM700 Full HD Camera
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Andrew Kolakowski

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Re: 4K signal over Ultrastudio 4K 2 and LG 31MU97

PostMon Dec 04, 2017 7:47 pm

Are they actually sell that many more to broadcast than to "home users"?
I would like to know what % sales are strict broadcast and what small/1 man companies.

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