Utilizing an audio signal to monitor a program with a technique that is operable even during a mute mode
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United States of America Patent
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Aug 21, 2012
Grant Date -
Dec 24, 2009
app pub date -
Jun 23, 2009
filing date -
Jun 23, 2008
priority date (Note) -
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Abstract
An apparatus for monitoring a program signal received from a broadcast source that is to be performed by reproduction equipment, wherein an audio portion of the program signal is broadcast in combination with a monitoring code to provide a combined audio signal, comprising a switch, a code detector, and a component configured to receive the combined signal from the broadcast source and to provide to each of the reproduction equipment and the switch a respective output signal related to the combined signal. The code detector is adapted to receive an audio output from the reproduction equipment which has a mute mode, the reproduction equipment transmitting at least the monitoring code from the combined audio signal to the code detector if not in the mute mode and not transmitting the monitoring code to the code detector if in the mute mode. The switch is configured to transmit at least the monitoring code from the combined audio signal to the code detector if the reproduction equipment is in the mute mode and not transmit the monitoring code to the code detector if the reproduction equipment is not in the mute mode.
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