| 摘要 |
PROBLEM TO BE SOLVED: To surely receive a prescribed command transmitted from a remote control device by even an equipment main body which does not have a time reception function by transmitting a time information frame including time information separately from a transmission frame by a remote control device. SOLUTION: When transmission and reception are performed between a remote control device R transmitting a time information frame and a device main body which does not have a time information reception function, the remote control device R transmits transmission frames F1 and F1' (the transmission frames F1 and F1' are the ones having the same contents). The device main body receives the transmission frame F1 and the remote control device R waits by time corresponding to time when the transmission frame F1' is transmitted. Next, the remote control device R transmits a time information frame F2 but the device main body does not receive the time information frame F2 because the device main body does not have a time information reception function. The device main body extracts a command from the received transmission frame F1 and executes the operation corresponding to the command. |
