Patent ID: 8174625

Claim:
A broadcast transmitter comprising: a generator for generating a broadcast signal having mobile data and known data; and a transmitting unit for transmitting the broadcast signal to one or more broadcast receivers, wherein the generator is for generating the broadcast signal by: encoding the mobile data for first error correction; convolutional encoding the encoded mobile data to output at least 2 bits from a first bit of the encoded mobile data; Reed-Solomon (RS) encoding the convolutional encoded mobile data by adding first parity data to the convolutional encoded mobile data; trellis encoding the RS-encoded mobile data in a trellis encoding unit, wherein at least one memory included in the trellis encoding unit is initialized by initialization data just prior to the known data; calculating second parity data based on the initialization data; replacing the first parity data with the second parity data; and outputting the replaced second parity data to the trellis encoding unit.