| 摘要 |
A technique is disclosed for monitoring viewership of programs being performed on reproduction equipment in response to a received broadcast signal. The technique comprises receiving the broadcast signal to provide a received output signal, adding a selected monitoring code to the received output signal to provide a combined output signal, inputting the received output signal to reproduction equipment for performing programs in the broadcast signal and for transmitting the monitoring code, detecting the transmitted monitoring code with a code detector positioned in proximity to the reproduction equipment; and providing viewership information based on the monitoring code. |
