| 摘要 |
PURPOSE:To execute instantly the gathering of data from an area of wide range by storing the data at detection of a marker signal broadcast to a device of each home and transmitting the stored data after a prescribed time, in an audience rate survey. CONSTITUTION:A broadcast station transmits a video signal via a mixer 2 and a transmitter 3. An H syncrhonizing signal in the video signal is counted 7, and a control circuit 8 applies a prescribed marker signal to the mixer 2 in synchronizing with the counted output. Each home branches a receiving signal, which is applied to a TV receiver 25 and a detector 37 provided corresponding to a telephone set 36. A tuner 26 of the detector 37 detects a marker signal by the counted value coincident with the value of the counter 7 of the broadcast station and the broadcast information during receiving is stored 29 by the detected output. The stored information is read out after a prescribed time by a timer 30 and transmitted to a gathering terminal 17 of the broadcast station via an encoder 32, an automatic telephone transmitter 33, and a telephone line 11. |
