Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!cs.utexas.edu!usc!hacgate!goddard@aic.hrl.hac.com
From: goddard@aic.hrl.hac.com
Newsgroups: sci.electronics
Subject: Re: automatic commercial deletion
Keywords: commercials, compressors, VCRs, film editting
Message-ID: <5171@hacgate.UUCP>
Date: 22 Sep 89 22:49:14 GMT
References: <6428@ingr.com> <11213@fluke.COM> <137@raider.MFEE.TN.US>
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Organization: Hughes Aircraft Co., El Segundo, CA
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In article <137@raider.MFEE.TN.US> crc@raider.MFEE.TN.US (Charles Cain) writes:
>But all of this is for naught if a station decides to block a network promo
>or commercial with their own. In that case, their is no way that I can think
>of that a 'commercial killer' could pick it up, unless it looked for a timing
>shift from one signal to the other, or looked for compressed audio, which 
>commercials are HIGHLY compressed to create the effect of louder and hence
>get your attention. This last method would probably be the best way to have
>something know it was receiving a commercial and do a backspace edit to last
>black and pause the recorder.

Is this technique something one could hope to use online, i.e. as I
watch the TV, when a commercial break begins (or soon thereafter), have
the TV automatically muted?  How does one detect compressed audio?  What
is compressed audio?  Sorry if these questions are really naive.

Nigel Goddard

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