Patent ID: 8045637

Claim:
A method of processing data of a transmitting system, comprising the steps of: generating a Reed-Solomon (RS) frame payload having a size of (N*Kc) enhanced data bytes and performing RS encoding and cyclic redundancy check (CRC) encoding on the RS frame payload, thereby generating an RS frame, wherein N is a column size of the RS frame payload and Kc is a row size of the RS frame payload; encoding the generated RS frame; generating a first data group comprising first, second and third regions, the second region being positioned between the first and third regions, the first region including K packets having main data and RS parity data, but no enhanced data, the second region including L packets having enhanced data, known data sequences, signaling information, and RS parity data but no main data, the third region including M packets having main data and RS parity data but no enhanced data, wherein K<M<L; interleaving the first data group to generate a second data group having fourth, fifth and sixth regions, the fifth region being positioned between the fourth and sixth regions, the fourth and sixth regions including main data, RS parity data, and enhanced data, the fifth region including enhanced data, known data sequences, signaling information, and RS parity data but no main data; trellis encoding the second data group; and modulating a broadcast signal including the trellis-encoded second data group for data transmission.