In transmitting stream data to a recording unit through a network, there is a method to detect that a synchronous recording has been designated from an input unit to transmit mute data to a recording unit through the network for a first predetermined time period during which the streaming data is held in a data holding unit for the first predetermined time value. In the case where it is determined that the data that the data holding unit holds is held for a second predetermined time value, the inputted stream data is transmitted to the recording unit through the network. The recording unit is permitted to record, in the state where sound is not interrupted, and it is permitted to execute data recording, in which operating time of mechanical parts is required so that the operating state of the recording unit shifts to the recording state, and/or responses relating to the control of the recording unit are taken into consideration.