VCR comercial eliminator

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Article #19620

#19620

From: Todd Day <todd>
Date: Mon, 29 Aug 1988 08:02

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I just saw this ad in the June, 1988, issue of Video Magazine on page 43:

Ad Zapper
Selective Recording Technology
VCR Commercial Eliminator

...Ad Zapper uses the new SRT technology so you can enjoy virtually
commercial-free recordings of your favorite TV shows and movies.
When your VCR records, Ad Zapper eliminates 95% of comercial time...
..Works with ... infra-red control...

Anyway, does anybody know what is in the video signal that tips off
this device that a commercial is coming up and when the commercial is
over?  On some cable channels like CNN and ESPN, they have the touch-tone
sounds before commercials begin and end, so it wouldn't be too hard to
key on those.  But what about standard broadcast channels which have
none of these tones?  Is there something in the vertical sync bar?


-- 
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   \| Isla Vista, CA   93117 |/        {sun}!pyramid!comdesign!ivucsb!todd

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Path: arc1-ca.pugleaf.net!utzoo!utgpu!water!watmath!clyde!att!osu-cis!tut.cis.ohio-state.edu!mailrus!ames!amdahl!pyramid!comdesign!ivucsb!todd
From: todd@ivucsb.UUCP (Todd Day <todd>)
Newsgroups: sci.electronics,rec.video
Subject: VCR comercial eliminator
Keywords: VCR
Message-ID: <257@ivucsb.UUCP>
Date: 29 Aug 88 08:02:18 GMT
Organization: The Audio Club at UCSB, Isla Vista, California
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