Patent ID: 8401042

Claim:
A method of transmitting a broadcast signal in a transmitter, the method comprising: encoding mobile data for forward error correction (FEC) to build a Reed-Solomon (RS) frame by adding a parity byte and cyclic redundancy check (CRC) data; block processing the encoded mobile data by a specific code rate; forming data groups including the block processed mobile data, wherein at least one of the data groups includes a first region and a second region, wherein the first region includes known data sequences, wherein the data groups include signaling information, MPEG header place holders, main service data place holders and non-systematic RS parity place holders, and wherein the signaling information includes information for a plurality of RS code modes for the mobile data and information for a plurality of serial concatenated convolutional code (SCCC) modes for the mobile data; deinterleaving data in the data groups; removing the main service data place holders and the non-systematic RS parity place holders and replacing the MPEG header place holders with MPEG headers to form mobile data packets; multiplexing main data packets including main data and the mobile data packets; performing systematic RS encoding on the main data in the multiplexed packets and non-systematic RS encoding on the mobile data in the multiplexed packets, wherein non-systematic RS parity data is added by the non-systematic RS encoding; interleaving data in the multiplexed packets as the inverse process of the deinterleaving; trellis encoding the interleaved data in a trellis encoder, wherein a memory included in the trellis encoder is initialized at a start of each of the known data sequences; and transmitting the broadcast signal including the trellis-encoded data.