Patent attributes
A data output apparatus (a) sets an output terminal to a first state where a data format of the output terminal is locked to a data format indicated by a first command and where the output terminal cannot output video data whose data format is different from the data format indicated by the first command, if the first command is received from a first control device, and (b) sets the output terminal to a second state where the data format of the output terminal is not locked to the data format indicated by the first command and where the output terminal can output video data whose data format is different from the data format indicated by the first command, if the second command is received from a second control device while the data format of the output terminal is locked to the data format indicated by the first command.
