the dtv 1 210 to resume the content playing transmitting and outputting the user needs to move from room 1 to room 2 and input a sink device conversion approval into the dtv 2 220 the dtv 2 220 sends the sink device conversion approval input by the user to the bdp 100 when the sink device conversion approval is received from the dtv 2 220 s 340 u2014 y the control unit 140 controls the bd playing unit 110 and the av processing unit 120 to resume the playing of contents the control unit 140 controls the communication interface unit 130 to transmit the played contents to the dtv 2 220 s 350 if a sink device conversion approval is received from the dtv 2 220 s 340 u2014 y it means that the user is ready to watch the contents through the dtv 2 220 content transmission in operation s 350 takes place after the moment when the transmission is suspended in operation s 330 i e to enable a user to watch the contents seamlessly since then the control unit 140 transfers a bdp control authority from the dtv 1 210 to dtv 2 220 s 360 the dtv which has the control authority is a dtv where a user command on the bdp unit 100 such as commands to play pause fast forward and rewind.