Patent ID: 8732769

Claim:
A video transmitter for wirelessly sending a video signal to a plurality of video receivers, the video transmitter comprising: a receiver portion configured to receive a command from any one of the plurality of video receivers; and a control portion configured to determine whether or not the command received by the receiver portion of the video transmitter is a given command, wherein: a vertical retrace period of each frame of the video signal wirelessly sent by the video transmitter is assigned as a transmissible period for sending a command from each of the plurality of video receivers to the video transmitter; when the control portion of the video transmitter determines the received command is the given command, during a command transmission period in which all of the plurality of video receivers can transmit commands, in response to the received given command, the control portion of the video transmitter assigns the transmissible periods for each of the video receivers per the vertical retrace period such that more transmissible periods are assigned to the video receiver that has sent out the received given command than to other video receivers; each frame of the video signals includes a header; the header of each frame of the video signals includes an identification (ID) number of one of the plurality of video receivers; the vertical retrace period of each frame of the video signals is assigned as the transmissible period of the video receiver which corresponds to the ID number included in the header of each frame of the video signals; and when the control portion of the video transmitter determines that the received command is a given command, the control portion of the video transmitter, during the command transmission period, changes the ID number of the header such that the number of headers having the ID number corresponding to the video receiver transmitting the given command is more than the number of headers having an ID number corresponding to the other video receiver.