Patent ID: 7428745

Claim:
An apparatus for inserting a plurality of event information tables (EITs) and a plurality of extended text tables (ETTs) into the data stream in a broadcast environment, the apparatus comprising: a generator to set a first transmission interval for a group of EIT 0 s containing program information covering a first broadcast time, and a second transmission interval for a group of EIT 1 s containing program information covering a second broadcast time after the first broadcast time, and to generate the group of EIT 0 s and the group of EIT 1 s, wherein the first transmission interval for the group of EIT 0 s is set narrower than the second transmission interval for the group of EIT 1 s wherein the generator is further configured to set a transmission interval for a group of EIT 3 s containing program description associated with a group of EIT 3 s, wherein the generator sets the transmission interval of the group of ETT 3 s to be greater than a sum of the first transmission interval for the group of EIT 0 s and the second transmission interval for the group of EIT 1 s.