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Resolve HDMI color contour issue.
I’ve posted this problem week ago, but maybe my subject was confusing, so got no response.
I’m really annoyed by this problem, so hope someone can help me on this.
I’m feeding decklink hdmi to jvc rs35 projector. And there’s always slight color banding (almost invisible
In most situation). But I have this shot lately, which is day for night with purple to blue sky , and color banding issue is really horrible.
Is this normal to have color banding in setup like mine? Anything I can do to improve or remove the banding?
Help really needed.Nick
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16 Replies
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Do you have a display that you are running from the HDMI or SDI outputs that is not showing the banding? Or another reason to believe it is the projector and not the footage/grade?
Are you using in-projector color management? On Panasonic consumer plasmas, the panel is advertised as 10-bit but utilizing the in-TV color management actually reduces the signal to 8-bit and results in a little bit of visible banding that you wouldn’t see on a 10-bit reference monitor from the same signal.
KC
prehistoricdigital.com
hardworkingpixels.com -
I don’t want to hijack the thread but regarding Panny color management – is there any way to turn that off and improve the look? Banding has always been my number one problem with my client monitoring.
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I think yes, you have to use a profile that isn’t using the THX/ISF functions but then you need a color management device (davio, etc.)… which could be the case with the Nick’s projector as well…
KC
prehistoricdigital.com
hardworkingpixels.com -
Hmm, I’ve never noticed a change to banding switching between any available modes. I have an HDLink which should be sufficient for some color management.
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I was using a Panasonic VT25 and my calibration guy left one profile that was “unmanaged,” there was definitely a visible difference between the two profiles… could have been specific to the set or the calibrations though… Yeah the HDLink might do the trick…
KC
prehistoricdigital.com
hardworkingpixels.com -
Just discovered the TV set has a service menu that has all sorts of goodies I didn’t know about before. This will be an interesting weekend project!
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Hi, Kevin.
1. The materials are from alexa and arriscanner, which is perfect when grading in other system.
2. These shots are also perfect viewing in Resolve VIEWER on the DVI monitor, no contour at all.
3. The projector is in normal mode, without any in projector process, and it’s directly connect to Decklink HDMI output.
4. I tried to connect decklink HDMI output to a HDMI monitor, the contour is there.
5. I don’t have any SDI device here to test.So, it can tell that the problem resides in the Resolve/Decklink system.
As it should be a popular setup here and there, am I the only one got this issue?Nick
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How do you know that your last device does not do that banding ? For me it seems that this device is what makes banding to happen ?
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Margus
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The Decklink cards HDMI is only YUV 422.
To get a proper signal you need to buy the HDlink and feed that with the Decklinks SDI out.
We had the same problem plus a NEC screen that can not run on YUV.
So we were forced to use a Gefen SDI2HDMI convertor which actually gets the job done very well.A slice of color…
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