[SBE] CALM

[Richard Burden]

Folks,

 

Here is a simplified answer.

 

The ear is a power sensitive device.    Thus, the related measurement is a
measurement of amplitude over time.    The documents A/85 and ITU-BS1770
refer to the method by which the measurement is made.

 

Many TV facilities rely on file based program material.    Perhaps the
smartest approach would be to measure the loudness content of the program
material prior to entering it into the file.     This is probably easier
said than done.

 

There are loudness controllers on the market today, which when inserted into
the program chain will provide some control over loudness.  While these
devices do a creditable job, it is better practice to solve the problem
prior to entry. 

 

 

Dick Burden

rwburden at pacbell.net

818-340-4590

 

  _____  

From: sbe-bounces at sbe.org [mailto:sbe-bounces at sbe.org] On Behalf Of Gary
Stewart
Sent: Wednesday, July 27, 2011 6:59 AM
To: sbe member discussion mail list
Subject: Re: [SBE] CALM

 

You at least should have a way to monitor loudness.  I don't know if you can
then get away with regular processors and better QC.

 

Gary Stewart

Engineering Dept.

Cornerstone TV

412-824-3930

 

  _____  

From: sbe-bounces at sbe.org [mailto:sbe-bounces at sbe.org] On Behalf Of Edwin
Bukont
Sent: Wednesday, July 27, 2011 12:33 AM
To: sbe
Subject: [SBE] CALM

 

What are folks doing with regard to the future implemenation of CALM A/85?
Is it expected to be all about use of processors, or are there production
and technical concerns being implemented beyond an Orban/Omnia solution?

Edwin Bukont CSRE, DRB, CBNT 
E2 Technical Services LLC
Tech-Knowledgy for When Sound Matters
Nashville, Baltimore, Wherever
V- 240.417.2475; F- 240.368.1265
ebukont at msn.com

 







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