According to one embodiment of the present invention, a broadcast signal transmission device comprises: one or more source modules for outputting a timed media data stream and a timed metadata stream for the timed media data stream, wherein the timed metadata stream includes a position metadata stream having position information of the one or more source modules, or an orientation metadata stream having orientation information of the one or more source modules; and a transmission interface for transmitting a data signal, wherein the timed media data stream and the timed metadata stream are respectively formatted into a file format based on an ISO BMFF in sample units, and the transmission interface can transmit, through a transmission network, a data signal including an ISO BMFF file, which includes the timed media data stream and the timed metadata stream.