Method and an apparatus for processing a broadcast signal including an interactive broadcast service

A receiver for processing a broadcast signal including an interactive broadcast service, the receiver comprising:

• receiving device configured to receive the broadcast signal including a closed caption channel and a specific channel carrying a plurality of parameter table sections;
• extracting device configured to extract a trigger which is a signaling element to identify signaling and establish timing of playout of interactive broadcast events from the closed caption channel of the broadcast signal, wherein the trigger includes location information specifying a location of a parameter table in the broadcast signal;
• trigger module configured to gather a plurality of parameter table sections each of which includes each of a plurality of parameter blocks based on the location information in the trigger, wherein the parameter table is divided into the plurality of parameter blocks, and form the parameter table containing metadata about applications and interactive broadcast events targeted to the applications using the plurality of parameter blocks;
• and
• processor configured to provide the interactive broadcast service based on the formed parameter table.