Digital broadcasting system and method of processing data

An apparatus for transmitting a broadcast signal, the apparatus comprising:

• an encoder configured to encode mobile data for FEC (Forward Error Correction) to build RS (Reed-Solomon) frames, wherein the RS frames includes a primary RS frame or primary and secondary RS frames according to RS frame mode information;
• a signaling encoder configured to encode Transmission Parameter Channel (TPC) data including the RS frame mode information;
• a divider configured to divide at least one of the RS frames into a plurality of portions;
• a block processor configured to convert one of the plurality of portions to a plurality of SCCC (Serial Concatenated Convolutional Coding) blocks;
• a converter configured to convert the plurality of SCCC blocks to data blocks;
• a group formatter configured to form data groups, wherein at least one of the data groups includes the data blocks, wherein a specific one of the data blocks includes the TPC data, wherein a third one of the data blocks includes a first known data sequence, wherein a fourth one of data blocks includes second and third known data sequences, wherein a fifth one of data blocks includes a fourth known data sequence, wherein a sixth one of data blocks includes a fifth known data sequence, wherein a seventh one of the data blocks includes a sixth known data sequence;
• a packet formatter configured to form data packets including data in the data groups;
• a multiplexer configured to multiplex main data packets including main data and the data packets;
• a trellis encoder configured to perform trellis encoding on data in the multiplexed data packets;
• and
• a transmission unit configured to transmit the broadcast signal including a parade of the data groups, the parade being a collection of data groups having same FEC codes,
• wherein the TPC data includes an identification field to indicate the parade to which each of the corresponding data groups belong.

A method for transmitting a broadcast signal, the method comprising:

• encoding mobile data for FEC (Forward Error Correction) to build RS (Reed-Solomon) frames, wherein the RS frames includes a primary RS frame or primary and secondary RS frames according to an RS frame mode information;
• encoding Transmission Parameter Channel (TPC) data including the RS frame mode information;
• dividing at least one of the RS frames into a plurality of portions;
• converting one of the plurality of portions to a plurality of SCCC (Serial Concatenated Convolutional Coding) blocks;
• converting the SCCC blocks to data blocks;
• forming data groups, wherein at least one of the data groups includes the data blocks, wherein a specific one of the data blocks includes the TPC data, wherein a third one of the data blocks includes a first known data sequence, wherein a fourth one of the data blocks includes second and third known data sequences, wherein a fifth one of the data blocks includes a fourth known data sequence, wherein a sixth one of the data blocks includes a fifth known data sequence, wherein a seventh one of the data blocks includes a sixth known data sequence;
• forming data packets including data in the data groups;
• multiplexing main data packets including main data the data packets and;
• performing trellis encoding on data in the multiplexed data packets;
• and
• transmitting the broadcast signal including a parade of the data groups, the parade being a collection of data groups having same FEC codes,
• wherein the TPC data includes an identification field to indicate the parade to which each of the corresponding data groups belong.