[rec.video] detecting TV commercials, is it possible?

jes@natinst.com (Jerry E. Sullivan) (09/15/89)

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?

Thanks,

Jerry Sullivan