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From: "Steve Andrew"
Subject: Re: Detection of television commercials
X-Newsreader: Microsoft Outlook Express 5.00.2615.200
Date: Fri, 06 Dec 2002 23:54:51 GMT
NNTP-Posting-Date: Sat, 07 Dec 2002 10:54:51 EST
Organization: BigPond Internet Services (http://www.bigpond.net.au)
> A long time ago, there was an attempt to do this by looking at the
> phase shift changes in the color burst when switching from one
> source to another. Not sure that phase change exists in modern
> If you come up with something, be sure to patent it. The advertisers
> might pay BIG money for you NOT to license it.
> Richard Haendel wrote:
>> Can anyone provide information on how to do this? I'm not looking to
>> build a "commercial killer" but I need to record and log certain
>> ones for a client.
Here on the Gold Coast in Australia, I can receive both the Brisbane and
Gold Coast Channel Ten Network. When movies are transmitted, the local
transmitter carries the same movie as Channel Ten, based in Brisbane.
Watching the two channels on separate receivers shows that the movie is in
perfect sync. During a commercial break, the local transmitter shows local
advertising, while the Brisbane channel carries separate advertising for
Brisbane. At the end of the break, the movies resumes at exactly the same
time. This indicates to me that both channels are using a common feed for
the movie. As there is no discernible time difference between the two
signals, the link is probably terrestrial microwave rather than via
satellite. (We are around 50kM from Brisbane)
I find it hard to believe that the affiliates advertising content is
manually cued. I would have thought that there might be something in the
signal sent by the network that cues the local add content. I suppose it's
possible that the cueing information is carried on the inter-station link
and not on the public signal.
Thoughts anyone ?
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