Patent ID: 8385410

Claim:
A method for transmitting a broadcast signal, the method comprising: adjusting packet timing and a program clock reference (PCR) of main service data packets; pre-processing mobile service data, wherein the pre-processing comprises: RS (Reed-Solomon)-CRC (Cyclic Redundancy check) encoding the mobile service data by adding RS parity and CRC data; block processing the encoded mobile service data by a specific code rate; forming data groups having the block processed mobile service data, wherein at least one of the data groups includes a plurality of regions; and formatting mobile service data packets having data in the data groups; multiplexing the main service data packets and the mobile service data packets to output multiplexed data packets; post-processing data in the multiplexed data packets, wherein the post-processing comprises: systematic RS encoding main service data in the multiplexed data packets; non-systematic RS encoding mobile service data in the multiplexed data packets; and interleaving the systematic and non-systematic RS encoded data; and transmitting a transmission frame including the interleaved data.