| 摘要 |
<p>A monitoring apparatus (3) which is used to monitor the channel actually selected by a TV set (1). A reference tuner (32) independently reproduces and output an audio signal of the channel to be monitored. An audio comparison part (31) compares the feature parameter of an audio signal from a loudspeaker output terminal (13) of the TV set and the feature parameter of the audio signal from the reference tuner to detect whether or not the both signals coincide with each other. A remote control signal receiving part (34) receives a signal from a TV remote control signal transmitter (2) to obtain information of a channel to be switched to. At the time of changing the channel of the reference tuner until coincidence is detected in the audio comparison part, a control part (37) indicates first to the reference tuner the channel to be switched to identified by the remote control signal part, thereby permitting fast and accurate monitoring of the channel being selected by the TV set.</p> |
