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Re: dynamic compression of comertials

It should be possible to reverse engineer compression, especially as it will largely feature speech.

Although hard limiting is non-linear, and so difficult to undo, much compression is a) detectable in signal terms and b) expandable

This means that, in theory, one could build into a TV set an automatic (and user adjustable) advertisement-tamer (you could even duck it completely, which is what many people do with the remote control)or cause it to be automatically substituted with nice, soothing, ambient MP3 material
Dr Peter Lennox
School of Technology 
University of Derby, UK
tel: 01332 593155
e: p.lennox@xxxxxxxxxxx  

-----Original Message-----
From: AUDITORY - Research in Auditory Perception [mailto:AUDITORY@xxxxxxxxxxxxxxx] On Behalf Of Prof. B.C.J. Moore
Sent: 20 September 2011 13:38
To: AUDITORY@xxxxxxxxxxxxxxx
Subject: Re: dynamic compression of comertials

Dear Zlatan,

On Sep 20 2011, Zlatan Ribic wrote:

>Dear List,
> compressed comertials in broadcasting are much louder if compared with 
> "standard" program. Is there any norm limiting this misuse?
You may be interested in:

Moore, B. C. J., Glasberg, B. R. & Stone, M. A. 2003. Why are commercials 
so loud? - Perception and modeling of the loudness of amplitude-compressed 
speech, Journal of the Audio Engineering Society, 51. 1123-1132.

Best wishes,


Prof. Brian C. J. Moore, Ph.D., FMedSci, FRS
Dept. of Experimental Psychology,
University of Cambridge,
Downing Street,
Cambridge CB2 3EB
Phone: 01223 333574
Fax 01223 333564

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