Patent ID: 8428150

Claim:
A method of processing a digital broadcasting signal generated by performing additional error correction encoding on additional input data, multiplexing the additional error correction encoded data with conventional input data, Reed-Solomon (RS) encoding the multiplexed data, interleaving the RS-encoded data, performing TCM encoding on the interleaved data, and transmitting the digital broadcasting signal including the TCM-encoded data, wherein performing the TCM encoding comprises encoding a first input bit to output a first output bit, precoding a second input bit to output a second output bit and mapping the first output bit, the second output bit and the first input bit to a value, the method comprising: tuning the digital broadcasting signal that includes second service data corresponding to the additional input data multiplexed with first service data corresponding to the conventional input data received from an antenna; TCM decoding the second service data and first service data in the tuned digital broadcasting signal; providing a soft output of the second service data and first service data; separating the TCM decoded second service data and first service data; outputting the second service data; removing RS parity from the output second service data; and additional error correction decoding the second service data from which the RS parity has been removed.