Apparatus for transmitting broadcast signal, apparatus for receiving broadcast signal, method of transmitting broadcast signal, and method of receiving broadcast signal

A broadcast signal reception apparatus comprising:

• a tuner configured to receive a broadcast signal including service data and signaling information for a service through a terrestrial broadcast network,
• the signaling information including a service identifier indicating the service, category information indicating a category of the service, and bootstrapping information to obtain service signaling information for the service that is transmitted via either the terrestrial broadcast network or a broadband network that is different from the terrestrial broadcast network;
• demodulator configured to demodulate the received broadcast signal by an OFDM (Orthogonal Frequency Division Multiplex) scheme;
• frequency de-interleaver configured to frequency de-interleave the demodulated broadcast signal;
• time deinterleaver configured to time de-interleaving the frequency de-interleaved broadcast signal including PLP (Physical Layer Pipe) data interleaved by a first interleaving operation or a second interleaving operation,
• the first interleaving operation including convolutional interleaving operation,
• the second interleaving operation including block interleaving operation which is based on a TI (Time Interleaving) block including one or more virtual FEC (Forward Error Correction) blocks;
• in response to the bootstrapping information that includes URL (Uniform Resource Locator) information of the service signaling information, a controller configured to acquire the service signaling information through the broadband network based on the bootstrapping information, or
• in response to the bootstrapping information that includes an IP (Internet Protocol) address of an IP packet carrying the service signaling information, the controller configured to acquire the service signaling information through the terrestrial broadcast network,
• wherein:
• the controller is further configured to acquire components carried in a plurality of transport packets, one or more transport packets of the plurality of transport packets carrying one or more SGDUs (Service Guide Delivery Units), and the service signaling information including transport session information of the plurality of transport packets.