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July 7th, 2007, 05:55 AM | #1 |
Regular Crew
Join Date: Mar 2007
Location: Rotterdam, The Netherlands
Posts: 25
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Broadcast safe HD and SD IRE levels
Is there any difference between these two?
In Premiere Pro the default setting for broadcast is 110 IRE, but someone told me that 100 is safer. Wouldn't the picture get too dark with the 100 IRE setting? Can I assume that 110 is really safe for broadcasting? |
July 7th, 2007, 02:26 PM | #3 | |
Inner Circle
Join Date: Jun 2003
Location: Toronto, Canada
Posts: 4,750
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Analog transmission imposes a limit of 120IRE for the broadcasted composite signal (the composite signal is the luma and chroma modulated together). Though in practice, you don't want to go above 115 IRE (since some old receivers will have problems with stuff >115 IRE) and the broadcaster may have a signal chain that sets the limit lower (e.g. they may store material on analog formats, which distort if the IRE level is too high). So check with your broadcaster as to what the maximum composite IRE level is.
HD generally isn't broadcasted the same way as SD NTSC and PAL so it doesn't have the composite IRE limits AFAIK. Quote:
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July 8th, 2007, 05:52 AM | #4 |
Regular Crew
Join Date: Mar 2007
Location: Rotterdam, The Netherlands
Posts: 25
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Thanks guys
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