Patent ID: 8854536

Claim:
An external device that is wirelessly connected to an information communication device, comprising: a synchronization data creation unit that outputs synchronization data used for establishing synchronization of timing of processing related to photography; a packet creation unit that (1) creates a communication packet including control information directing the processing related to photography and that (2) is adapted to create a communication packet including the synchronization data and the control information when the synchronization data creation unit has output the synchronization data; a packet output unit that outputs the communication packet to the exterior by wireless communication; a packet reception unit that receives the communication packet; a detection unit that detects the synchronization data before all of the communication packet received by the packet reception unit has been read in; and a signal output unit that outputs a synchronization signal used for establishing synchronization of the timing of the processing related to photography on the basis of detection by the detection unit of the synchronization data, wherein the synchronization data is data including a start of frame delimiter or is data including a predetermined number of bits after the start of frame delimiter in the communication packet.