Transmitting system and method of processing digital broadcast signal in transmitting system, receiving system and method of receiving digital boradcast signal in receiving system

An apparatus for transmitting a broadcast signal in a transmitter, the apparatus comprising;

• a formatter configured to form a data group including a specified number of mobile data packets and a scalable number of mobile data packets;
• an interleaver configured to interleave data in the data group;
• a transmission unit configured to transmit a broadcast signal including the interleaved data including the data group during a slot,
• wherein the data group includes a plurality regions, the plurality regions include a plurality of blocks, and wherein each block includes mobile data and a specific block includes signaling data, wherein the signaling data includes a protocol version field indicating whether or not the scalable number of mobile data packets exist in the slot,
• wherein a first region includes central 4 blocks in the data group, a second region includes 2 blocks being concentric about the first region, a third region includes 2 blocks being concentric about the first and second regions and a fourth region includes 2 blocks being concentric about the first, second and third regions,
• wherein at least one block of the regions includes known data sequences inserted in a predetermined area of the at least one block, and
• wherein the data group further includes a fifth region including the scalable number of mobile data packets.

A method of receiving a broadcast signal in a receiver, the method comprising:

• receiving a broadcast signal including a transmission frame, wherein a parade of data groups in the broadcast signal is received during slots within the transmission frame, each slot including a specified number of mobile data packets and a scalable number of mobile data packets, wherein each data group including a plurality of regions, the plurality of regions including a plurality of blocks, and wherein at least one block includes known data sequences inserted in a predetermined area of the at least one block;
• detecting the known data sequence from a specific block of the each data group;
• demodulating data in the each data group and equalizing channel of mobile data in the each data group using the detected known data sequences;
• decoding the signaling information in the demodulated data using the detected known data sequences, wherein the signaling information includes a protocol version field indicating whether or not the scalable number of mobile data packets exist in the each slot.

An apparatus of receiving a broadcast signal in a receiver, the apparatus comprising:

• a receiving unit configured to receive a broadcast signal including a transmission frame, wherein a parade of data groups in the broadcast signal is received during slots within the transmission frame, each slot including a specified number of mobile data packets and a scalable number of mobile data packets, wherein each data group including a plurality of regions, the plurality of regions including a plurality of blocks, and wherein at least one block includes known data sequences inserted in a predetermined area of the at least one block;
• a known data sequence detector configured to detect the known data sequence from a specific block of the each data group;
• a demodulator configured to demodulate data in the each data group and equalizing channel of mobile data in the each data group using the detected known data sequences;
• (demodulator)
• a decoder configured to decode the signaling information in the demodulated data using the detected known data sequences, wherein the signaling information includes a protocol version field indicating whether or not the scalable number of mobile data packets exist in the each slot.