🚀 go-pugleaf

In article <4482@natinst.natinst.com> (Jerry E. Sullivan) writes:
>Is it possible to detect impending commercials in TV broadcasts electronically?
>I suspect some kind of inaudible tones might be present. If there are such
>signals, are they filtered before they reach my home? If there is a signal,
>whre might I find out its exact nature?
>

	"Radio Electronics" had an article on how to 'blank out' commercials
from FM radio broadcasts a while back.  It's based on the fact that advertisers
want very badly to be HEARD, so they often use somewhat distorted signals to
get a higher apparent volume.  They do this by amplifying the signal so that
it's clipped to a certain degree, but not too noticably.

	I've noticed that TV commercials tend to seem louder too, so this
same sort of detector should work.

								Rick