Does Using Converters Degenerate Outputted Signals?

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colourdesk

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Does Using Converters Degenerate Outputted Signals?

PostTue Jul 02, 2019 2:23 am

Hi all,

I'm currently monitoring for colour with an older Eizo CG246. Using my Ultrastudio 3D's SDI outputs, I'm outputting to a BMD Mini Converter SDI to HDMI 6G, then outputting to an Eizo CG246's 1.4a HDMI connector. So...

Ultrastudio 3D :arrow: BMD Mini Converter SDI to HDMI 6G :arrow: Eizo ColorEdge CG246

Meanwhile in the Desktop Video app, I've set the SDI output to convert video to RGB 4:4:4.

The BMD Mini Converter SDI to HDMI 6G specs say it has HDMI Colour Precision for 4:4:4.

So on the surface it appears to work well, but there's no way of confirming from the monitor itself that the signal it's receiving is the same unscathed 10-bit 4:4:4 signal originally outputted from the Ultrastudio 3D.

I'm wondering if the double-handing of the outputted signal is degenerative. Could anyone could share some insight on this? It'd bring me great peace of mind.

Many thanks!
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Myron Hobizal

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Re: Does Using Converters Degenerate Outputted Signals?

PostFri Jul 05, 2019 11:01 pm

There is no degenerating with digital signals. The monitor should still be getting 4:4:4 10bit. The only way to confirm is to put up a ramp and look for 8-bit banding.

I have a similar setup and see no banding as long as SDI 4:4:4 is enabled:
Decklink Mini Monitor 4k -> Mini Converter SDI to HDMI 6G -> HDMI out to -> Eizo CG2420.
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colourdesk

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Re: Does Using Converters Degenerate Outputted Signals?

PostThu Jul 11, 2019 10:01 am

Myron Hobizal wrote:There is no degenerating with digital signals. The monitor should still be getting 4:4:4 10bit. The only way to confirm is to put up a ramp and look for 8-bit banding.

I have a similar setup and see no banding as long as SDI 4:4:4 is enabled:
Decklink Mini Monitor 4k -> Mini Converter SDI to HDMI 6G -> HDMI out to -> Eizo CG2420.


Thank you for your reply, Myron! You've brought me great peace of mind. :D
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Andrew Kolakowski

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Re: Does Using Converters Degenerate Outputted Signals?

PostThu Jul 11, 2019 8:24 pm

Just note that this is all true with good converters. Some may be just eg. 8bit (or 8bit for some modes which is not properly explained in manual).

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