Patent ID: 8494083

Claim:
A method for processing a digital broadcast signal at a transmitter, the method comprising: formatting the data group including mobile service data, wherein formatting the data group comprises: mapping the mobile service data into a data group; adding training sequences into corresponding locations of the data group, wherein at least 5 of the training sequences are spaced M segments apart in the data group, wherein at least 1 of the training sequences is inserted between a first training sequence and a second training sequence of the at least 5 training sequences, and wherein M is an integer; adding signaling data into the data group, wherein the signaling data are added between the first training sequence of the at least 5 training sequences and the at least 1 of the training sequences; inserting place holder bytes for MPEG header and non-systematic Reed-Solomon (RS) parity into the data group; and deinterleaving data in the data group; non-systematic RS encoding the mobile service data in the formatted data group to insert the non-systematic RS parity into locations where the place holder bytes for the non-systematic RS parity were inserted in the formatted data group; and transmitting a digital broadcast signal including the non-systematic RS-encoded mobile service data.