| 摘要 |
PURPOSE:To register the time of transmission/reception precisely and to simplify a time correcting operation by correcting the time of a clock part on the basis of the time information of a time correcting signal outputted from a reference clock. CONSTITUTION:Receiving an ON signal for a selection switch 14, a control part 15 includes a time correction command signal and a reference time signal from a clock part 6 among a protocol signal outputted from a protocol signal generating part 8. The protocol signal is encoded and modulated and the modulated protocol signal is sent to a circuit 12 together with a modulated picture signal. These signals are received through a circuit coupling part 17 and the protocol signal out of these signals is demodulated by a protocol signal demodulator 23 and decoded by a protocol signal decoder 24. When the decoded signal is inputted to a detector 26 and a time correction command signal is detected, a control part 27 adjusts the time of a clock part 25 to a reference time on the basis of a reference time signal. |
