Device for transmitting broadcast signal, device for receiving broadcast signal, method for transmitting broadcast signal, and method for receiving broadcast signal

An apparatus for processing a broadcast signal, the apparatus comprising:

• a tuner configured to receive a broadcast signal via a broadcast stream, the broadcast signal including service components of a broadcast service, service signaling information for signaling the broadcast service and a service list table;
• a parser configured to parse the broadcast signal and obtain the service list table, the service list table including bootstrap information for indicating a Real time Object delivery over Unidirectional Transport (ROUTE) session which delivers the service signaling information,
• wherein the parser is further configured to obtain the service signaling information by using the bootstrap information, the service signaling information includes first and second metadata,
• wherein the first metadata is used to determine a transport mode of each of the service components, and wherein the second metadata provides session description information for accessing the service components from the broadcast stream,
• wherein the parser is further configured to obtain the service components for the broadcast service;
• and
• a media processor configured to provide the broadcast service by using the service signaling information.