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Old 01-22-2011, 10:13 PM
critictalk critictalk is offline
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Join Date: May 2005
Posts: 220
Default Re: Help! TV delivery specs question

Quote:
Originally Posted by Postman View Post
Hey critictalk,

First, I hope you are aware of the difference between peak levels (you say "-10") and averaged or rms levels (you say "-20"). If not, have a look here for some basics: http://myhometheater.homestead.com/rms.html

Our ears act much more like RMS meters than peak meters (a VU meter is like an RMS meter). I think you can benefit from some reading about what loudness measurements are and why our industry has begun to adopt them so much. An "leq meter", as you called it, has an rms meter at it's core. While an leq meter is not the same as rms meter, it is designed to keep a running tab on the "loudness" of our programs. Check out this document.
http://tech.ebu.ch/docs/techreview/t...ss_Camerer.pdf

I'm not sure if you'll understand every detail on first read-through, but it totally covers your questions. You are asking about an "leq meter". In that document look for "LUFS" (same thing as "LKFS") meter, which is a currently accepted type of "leq meter". The article's writer has a European background, so some terms may not be familiar. When he says "quasi peak" meters, realize those are another form of peak meter (not equivalent but similar). Your -10 readings came from a peak meter, I believe.

Good luck, this is technical stuff that is very important for broadcast, and not as important for film work.
Thx Postman
Thx for your help
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