Method and system for enabling television commerical monitoring

Facsimile and static presentation processing – Facsimile – Recording apparatus

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Details

358908, 360 8, 360 141, 360 18, 360 31, 360 331, G11B 2002, H04N 544, H04N 560

Patent

active

047500530

ABSTRACT:
A system and method for detecting and marking television commercials is provided. A first comparator is utilized for comparing the television video signal to an adjustable reference voltage and for generating a triggering signal when a video signal is not present at the comparator input. A second comparator compares the television audio signal to a second adjustable reference voltage to provide a triggering signal when an audio signal is not present at the comparator input. The outputs from the two comparators are supplied to a one-shot timer mechanism which is adapted to generate an output signal of a predetermined time period only upon the simultaneous absence of an audio and video signal, thus signifying a fade break in the television broadcast signal. The timed output signal from the timer mechanism is connected to a low frequency oscillator which generates a low frequency output signal upon being actuated by the output from the timer mechanism.

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