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Proper Set Up for Broadcast
Preparing to do final color/brightness/contrast corrections on a piece (SD-ntsc), destined for broadcast in U.S., and I only want to do this once. So, working with a Decklink Extreme, would I be correct to engage the 7.5 setup in the BMD software, calibrate the TV monitor with color bars with that setting, then proceed to correct on that basis? Though the footage generally looks better with the “no-setup” engaged, I assume that to do corrections with “no-setup” setting, an NTSC broadcaster would bump it up 7.5, effectively over-exposing everything. Thanks in advance for any words of wisdom on this.
Bill Buchanan
Buchanan Film Co. -
4 Replies
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Not sure what NLE you’re using.
But if you’re using Final Cut, then black is at zero IRE. This is very important because everything else that will work in conjunction with FCP (DVD Studio Pro, etc.) will depend on having black set at zero IRE.
For example, when making a DVD, DVDSP will set the encoding black level to zero. The DVD then goes into the DVD player, and that device will then output with black level at 7.5 IRE for American television sets. If that DVD gets sent to Japan, then the Japanese DVD player will output at zero IRE for their television sets.
For analog output, select 7.5 IRE as the “setup” via the Decklink control panel to get the proper setup of 7.5 IRE for analog mastering to Betacam decks, etc.
The broadcaster should be expecting a setup of 7.5 IRE on analog tapes. The color bars written on the tape leader will confirm this, assuming that someone in playback is paying attention.
Dean Sensui — http://www.HawaiiGoesFishing.com
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Thanks, Dean. Exactly what I needed to know. BTW, I’m using PremPro 2. I recently did a show for DVD distribution only, and had BMD set at 0 ire during color correction, etc. and generating the M2V file. When I ran it on a DVD player (U.S.), it looked like hell (brightness and contrast way off), apparently because of the 7.5 being added as you point out.
Making certain I understand your recommendation (using PremPro in my case), I will color/brightness/contrast correct with BMD set at 7.5 ire, (with of course the tv monitor calibrated using bars at 7.5), then output the show to BetaSP or DigiBeta, and it will be broadcast looking like it should, assuming “someone in playback is paying attention.”
Bill Buchanan
Buchanan Film Co. -
Thanks, Dean. I’m using Prem Pro 2.
Bill Buchanan
Buchanan Film Co. -
[Bill Buchanan] “recently did a show for DVD distribution only, and had BMD set at 0 ire during color correction, etc.”
Bill…
I made the same mistake when I first started using the Decklink card. Learned the hard way! 🙂
Dean Sensui — http://www.HawaiiGoesFishing.com
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