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TV Studio Design - Using an HDTV On Set

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Jeremy Eccard
TV Studio Design - Using an HDTV On Set
on Jul 29, 2009 at 8:31:22 pm

We are in the process of building a set and have come across some issues. Hopefully someone on here can help out...

We have a Sony KDL-46S5100 LCD on set, with a PowerMac G5 pushing a 1080p signal via DVI to HDMI cable. To the human eye everything looks great, no issues. But when viewed through from our control room (program out) some flickering appears, coming from the HDTV set. No matter what the content is (looping logo, desktop, etc.) The cameras in the studio are fairly old, Ikegami Unicam HL55A (3), Sony DSR-300 (1), Sony DSR-390 (1), and Sony DSR-450 (1). All cameras are fed to a Sony DSF-500 switcher. We tried adjusting the shutter speed in the Sony's but it didn't eliminate the problem.

Any help on what could be causing this is appreciated.


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Mike Golding
Re: TV Studio Design - Using an HDTV On Set
on Jul 30, 2009 at 9:46:00 pm

a handful of questions first:

does this only occur at 1080p from the G5?
what refresh rate are you running the output of the G5 at?
how much detail do you have set in the cameras? Normally we tend to roll a bit of detail off of the cameras when we shoot the screen in the shot to get rid of some of the noise.
assuming that this unit is not the 120hz set, what happens from another source, like either a blu-ray or even the G5 coming in at a different res or through the vga port?
what f stop are you at with your cameras?

MBP 2.4 4GB Ram/FCS2
Power Mac Dual 1.8 G5/5.5GB Ram/Radeon 9600/FCS2
Aja io hd for MBP/ Aja io LA&LD for G5


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Jeremy Eccard
Re: TV Studio Design - Using an HDTV On Set
on Aug 4, 2009 at 4:59:25 pm

Thanks for the feedback.

1. Occurs with any resolution not just 1080p
2. Refresh Rate is set to default
3. Detail is all the way up so we can get more snap out of the old cameras
4. Will try using another port. Also going to try a DVD player up-converting. We currently don't have access to a Bluray player, sorry.
5. F-Stop is between 2.8-4.0



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Mike Golding
Re: TV Studio Design - Using an HDTV On Set
on Aug 5, 2009 at 12:31:39 am

curious to see what happens if you lower the detail to 10% and make sure you set the refresh rate to 60hz (or whatever refresh you have the graphics card set to) and see if that helps. If that does help, start rolling in more detail until you start to see the return of the shakes.

If lowering the detail doesn't work, and changing the port does- then it is that input module.

if changing the port doesn't work but using a different source( another computer) then you have something in the G5.

this should start you down the path until you get a bit more information. Personally I think you will find the detail is causing the issues but do the due diligence and try to eliminate issues and see what happens from there.

MBP 2.4 4GB Ram/FCS2
Power Mac Dual 1.8 G5/5.5GB Ram/Radeon 9600/FCS2
Aja io hd for MBP/ Aja io LA&LD for G5


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