| 摘要 |
PURPOSE:To realize a remote operation of a receiver by actuating a display device, etc. with the signal sound inserted to a part of a broadcast sound. CONSTITUTION:The output of a broadcast device 1 reaches a receiver 12 via a transmission antenna 2 and a reception antenna 11. At the transmission side a signal sound composed by a remote control signal generator 10 by the frequency and its change, code duration, etc. is inserted to a part of a broadcast sound. At the reception side, the signal sound is received by a microphone 14 set close to a speaker 13. Then a driving motor 19 for display device, etc. of the receiver 12 are driven by an amplifier 16, decoder 17 and a control circuit 18. |
