Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!uwm.edu!uakari.primate.wisc.edu!nic.MR.NET!ns!logajan
From: logajan@ns.network.com (John Logajan)
Newsgroups: sci.electronics
Subject: Re: detecting TV commercials, is it possible?
Message-ID: <1669@ns.network.com>
Date: 15 Sep 89 22:46:19 GMT
References: <4482@natinst.natinst.com> <78@uwm.edu> <3553@dgis.daitc.mil>
Sender: logajan@ns.network.com (John Logajan)
Organization: Network Systems Corp. Mpls MN
Lines: 17

generous@dgis.daitc.mil (Curtis Generous) writes:
> through the user's guide and the principle that it used was that
> the _only_ time that a total lack of video signal was present was during
> the pause right before a commercial was to start.

Having just learned a bit about video editing (for public access cable tv)
I would guess that this is a very unreliable way to detect commercials.

It is true that you often will see "black" between program and commercial,
it is certainly not a requirement -- but worse still is that you might
often see "black" between one scene and the next, especially if they want
to highlight a time or location transistion.


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