Patent ID: 8594261

Claim:
A receiving system, comprising: a tuner configured to receive a broadcast signal including first mobile service data and second mobile service data through a first data group, wherein the first data group is generated by interleaving a second data group in a transmitting system, wherein the second data group is configured of M1 number of packets, wherein, among the M1 number of packets included in the second data group, M2 number of packets include the first mobile service data and a plurality of known data sequences, wherein, among remaining M3 number of packets, at least one packet includes the second mobile service data, wherein, among the M3 number packets included in the second data group, at least one packet includes a plurality of short known data sequences, and wherein M1=M2+M3, M2>M3; a demodulator configured to demodulate the broadcast signal; a block decoder configured to perform turbo-decoding on the first and second mobile service data included in the demodulated broadcast signal; and a Reed-Solomon (RS) frame decoder configured to build a primary RS frame by collecting a portion of the turbo-decoded first mobile service data, to perform error correction decoding on the primary RS frame, to build a secondary RS frame by collecting the other portion of the turbo-decoded first mobile service data and the turbo-decoded second mobile service data and to perform error correction decoding on the secondary RS frame.