Patent ID: 8385448

Claim:
A digital broadcast receiver, comprising: a demodulator which receives a transport stream (TS) including a normal data stream and an additional data stream, and demodulates the received TS; an equalizer which equalizes the demodulated TS; and a decoder which decodes, according to a variable coding rate, the additional data stream, wherein the TS comprises at least one additional data stream processed according to the variable coding rate, and wherein the decoder comprises: a trellis decoder which trellis decodes the additional data stream; a deinterleaver which deinterleaves the additional data stream trellis-decoded by the trellis decoder without deinterleaving the normal data stream; and a decoding unit which convolution decodes, according to the variable coding rate, the additional data stream deinterleaved by the deinterleaver without convolution decoding the normal data stream.