A method for transmitting a broadcast signal in a digital broadcast transmitter, includes generating components of a service, wherein the components of the service includes audio data or video data; generating first signaling information including session instance description information for at least one Real-Time Object Delivery over Unidirectional Transport (ROUTE) session and at least one Layered Coding Transport (LCT) channel in which the components of the service are delivered, wherein the session instance description information includes first source Internet Protocol (IP) address information of the at least one ROUTE session, first destination IP address information of the at least one ROUTE session, first destination port information of the at least one ROUTE session, and transport session identification information for the at least one LCT channel; and generating second signaling information which is used for acquiring the first signaling information.