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Australia broadcast luma and chroma limits
Hi there,
Trying to find out what the broadcast safe limits are for luma and chroma in Australia.
Is it different per broadcaster?
Just want the gist:
is it 0-100 on luma
-20 to 130 on chroma?
Mac Pro 2 x 2.4Ghz, 16GB RAM, GTX 660
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3 Replies
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AFAIK, the main broadcasters in Australia are members of the ITU, so regular Rec.709 levels are what they require.
https://en.wikipedia.org/wiki/Rec._709
https://www.itu.int/dms_pubrec/itu-r/rec/bt/R-REC-BT.709-5-200204-I!!PDF-E.pdf
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So I had a read through that document. Didnt discuss DV Pal, rather it was in regards to HD broadcast, but assuming they wish to have the same levels I found this to be what they said.
So assuming I am reading this correctly, the levels for broadcast are not 0-255, but rather 16-235 for luminance.
Could not see what chrominance values are supposed to be?
I have heard to not go over 75% on the vector scope, though would like to know what values that means so I can simply apply the video limiter effect and set it up right.
Mac Pro 2 x 2.4Ghz, 16GB RAM, GTX 660
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Ah, didn’t think of SD, but yes 16 – 235 is right.
75% on the chrominance is a decent rule of thumb.
TBH, I would advise against using clippers to set maximum levels without at least setting them roughly right first.
I don’t know which video limit effect you’re using, there are a few and they don’t all set up the same.
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