Patent ID: 8059627

Claim:
An apparatus for receiving a broadcast signal, the apparatus comprising: a signal receiving unit configured to receive the broadcast signal including a transmission frame having a parade of data groups that includes a collection of data groups having same Forward Error Correction (FEC codes), each of the data groups including mobile data, Transmission Parameter Channel (TPC) data and known data sequences, wherein the each of the data groups further includes a plurality of regions, the plurality of regions including data blocks, wherein a first of the plurality of regions includes central 4 data blocks of the data blocks, wherein a second of the plurality of regions includes 2 data blocks which are concentric about the first of the plurality of regions, wherein a third of the plurality of regions includes 2 data blocks which are concentric about the first and second of the plurality of regions, wherein a fourth of the plurality of region includes 2 data blocks which are concentric about the first, second and third of the plurality of regions, wherein a first known data sequence of the known data sequences is inserted into a third data block of the data blocks, wherein second and third known data sequences of the known data sequences are inserted into a fourth data block of the data blocks, wherein a fourth known data sequence of the known data sequences is inserted into a fifth data block of the data blocks, wherein a fifth known data sequence of the known data sequences is inserted into a sixth data block of the data blocks wherein a sixth known data sequence of the known data sequences is inserted into a seventh data block of the data blocks, wherein the TPC data includes an identification field to indicate the parade to which the corresponding data group belongs; a demodulator configured to demodulate the broadcast signal; and an RS (Reed-Solomon) decoder configured to decode the demodulated broadcast signal.