Patent ID: 8488064

Claim:
A method of processing digital broadcast data in a digital television (DTV) transmitter, the method comprising: randomizing enhanced data; Reed-Solomon (RS) coding and Cyclic Redundancy Check (CRC) coding the randomized enhanced data to generate an RS frame; encoding the RS-CRC coded enhanced data at a code rate of 1/H, wherein H ≧2; interleaving the encoded enhanced data; converting symbols of the interleaved enhanced data to enhanced data bytes; deinterleaving the enhanced data bytes; multiplexing enhanced data packets including the deinterleaved enhanced data bytes with main data packets including main data bytes; randomizing the multiplexed main data packets and Moving Picture Expert Group (MPEG) header data in the multiplexed enhanced data packets; RS coding the randomized main data packets and the enhanced data packets having the randomized MPEG header data to add systematic RS parity data to the randomized main data packets and add non-systematic RS parity data to the enhanced data packets having the randomized MPEG header data; interleaving data in the RS-coded main data packets and enhanced data packets; and replacing at least a portion of the non-systematic RS parity data with new RS parity data recalculated for backward compatibility.