Patent ID: 8054858

Claim:
A method of processing digital broadcast data in a digital television (DTV) transmitter, the method comprising: pre-coding first enhanced data by coding the first enhanced data for forward error correction (FEC) at a first coding rate; pre-coding second enhanced data by coding the second enhanced data for forward error correction (FEC) at a second coding rate; inserting place-holder bytes for nonsystematic Reed-Solomon (RS) parity into a data group; removing the place-holder bytes and generating enhanced data packets including the pre-coded first and second enhanced data; RS-coding the enhanced data packets in an RS encoder, the RS encoder coding each enhanced data packet by a nonsystematic RS encoding scheme, wherein parity bytes obtained from the nonsystematic RS encoding scheme are inserted in a predetermined parity byte location within each enhanced data packet; and interleaving data of the RS-coded enhanced data packets in a data interleaver, wherein the data interleaver outputs a group of interleaved data including first, second and third data regions, the second data region being located between the first and third data regions and including a plurality of consecutive enhanced data.