Patent ID: 8396088

Claim:
A digital broadcast receiver, comprising: a tuner configured to receive a broadcast signal comprising mobile service data, wherein the broadcast signal is transmitted from a broadcast transmitter by: generating a Reed-Solomon (RS) frame by RS-encoding an RS frame payload with an RS code of (187+P, 187) and Cyclic Redundancy Check (CRC)-encoding the RS-encoded RS frame payload, thereby adding P bytes of first parity data at bottom ends of columns of the RS frame payload and adding 2 bytes of CRC data at right ends of rows of the RS frame payload including the first parity data, wherein the RS frame payload includes mobile service data, and wherein P is one of 24, 36, and 48, mapping, by a group formatter, a portion of the RS frame into at least one region of a first data group that has a plurality of regions, the first data group including a plurality of segments, wherein a number of mobile service data in an Nth segment of the first data group is less than a number of mobile service data in an (N+1)th segment of the first data group, wherein the number of mobile service data in the (N+1)th segment of the first data group is less than a number of mobile service data in an (N+2)th segment of the first data group, wherein the first data group further includes signaling information on a transmission parameter, and wherein the signaling information includes an RS code mode field indicating the RS code for the RS frame, trellis-encoding, by a trellis encoder, data being outputted from the group formatter, the trellis encoder having at least one memory that is initialized at each start of known data sequences, and multiplexing the trellis-encoded data with field synchronization data and segment synchronization data; a demodulator configured to perform demodulating on the broadcast signal; and a decoder configured to perform decoding on the demodulated broadcast signal.