Digital broadcasting system and data processing method
A receiving system and data processing method therein are disclosed, by which mobile service data is received and processed. The present invention includes a demodulator receiving a broadcast signal including mobile service data and main service data, the demodulator converting the received broadcast signal to a baseband signal, the mobile service data configuring a data group, the data group including a plurality of know data sequences, a known data detector detecting a location of at least one of the known data sequence within the data group, the known data detector outputting detected known data location information, an equalizer channel-equalizing the demodulated mobile service data using the detected known data location information, and a signaling decoder reconstructing transmission parameter channel (TPC) data and fast information channel (FIC) data received by being included in a signaling information area allocated between a first known data sequence and a second known data sequence among a plurality of the known data sequences.
1. A receiving system, comprising:
a signal receiving unit for receiving a broadcast signal including a data group, the data group comprising mobile service data and a plurality of known data sequences;
a known data detector for detecting the plurality of known data sequences from the data group included in the broadcast signal and outputting known data information;
an equalizer for compensating for channel distortion of the mobile service data using the known data information; and
a signaling information decoder for reconstructing transmission parameter channel (TPC) data and fast information channel (FIC) data received in a signaling information region that is assigned between the plurality of known data sequences, and outputting at least data group information, serial concatenated convolution code (SCCC) information, or Reed-Solomon (RS) frame encoding information according to the reconstructed TPC data and the known data information.
2. The receiving system of claim 1 , further comprising a block decoder for performing turbo decoding by a block unit on the mobile service data output from the equalizer according to the SCCC information.
3. The receiving system of claim 2 , further comprising an error corrector for performing error correction decoding by an RS frame unit on the mobile service data output from the block decoder according to the RS frame encoding information and correcting an error in the mobile service data.
4. The receiving system of claim 1 , wherein the data group is received in at least one slot, wherein one sub-frame comprises a plurality of slots, and wherein one transmission frame comprises a plurality of sub-frames.
5. The receiving system of claim 4 , wherein a slot number j for carrying the data group i among the plurality of slots within the sub-frame is calculated by applying the following equation:
j =(4 i+O ) mod 16,
where, O=0 if i<4,
O=2 else if i<8,
O=1 else if i<12,
O=3 else,
wherein i indicates a data group number, 0≦i≦15 and 0≦j≦15.
6. The receiving system of claim 1 , wherein a number of RS parity bytes added to the mobile service data, a number of RS parity bytes added to the TPC data, and a number of RS parity bytes added to the FIC data are different.
7. The receiving system of claim 1 , further comprising a power controller for controlling power to receive the data group including the mobile service data based on the TPC data.
8. The receiving system of claim 1 , wherein one of the plurality of known data sequences is configured in a first pattern and the rest of the plurality of known data sequences is configured in a second pattern that is different from the first pattern.
9. The receiving system of claim 1 , wherein the signaling information decoder comprises:
a decoder for performing turbo decoding on data included in the signaling information region;
a demultiplexer for demultiplexing the TPC data and the FIC data from the turbo-decoded data;
a first error corrector for correcting an error in the demultiplexed TPC data;
a block deinterleaver for performing block deinterleaving on the demultiplexed FIC data; and
a second error corrector for correcting an error in the block-deinterleaved FIC data.
10. The receiving system of claim 9 , wherein the block deinterleaver deinterleaves the FIC data by TNoG (column)×51 (row) block units, wherein TNoG corresponds to a total number of data groups being assigned to all sub-frames within one transmission frame.
11. A method of processing data in a receiving system, the method comprising:
receiving a broadcast signal including a data group, the data group comprising mobile service data and a plurality of known data sequences;
detecting the plurality of known data sequences from the data group included in the broadcast signal and outputting known data information;
compensating for channel distortion of the mobile service data using the known data information; and
reconstructing transmission parameter channel (TPC) data and fast information channel (FIC) data received in a signaling information region that is assigned between the plurality of known data sequences, and outputting at least data group information, serial concatenated convolution code (SCCC) information, or Reed-Solomon (RS) frame encoding information according to the reconstructed TPC data and the known data information.
12. The method of claim 11 , further comprising performing turbo decoding by a block unit on the mobile service data, which compensates for channel distortion, according to the SCCC information.
13. The method of claim 12 , further comprising performing error correction decoding by an RS frame unit on the turbo-decoded mobile service data according to the RS frame encoding information and correcting an error in the mobile service data.
14. The method of claim 11 , wherein the data group is received in at least one slot, wherein one sub-frame comprises a plurality of slots, and wherein one transmission frame comprises a plurality of sub-frames.
15. The method of claim 14 , wherein a slot number j for carrying the data group i among the plurality of slots within the sub-frame is calculated by applying the following equation:
j =(4 i+O ) mod 16,
where, O=0 if i<4,
O=2 else if i<8,
O=1 else if i<12,
O=3 else.
wherein i indicates a data group number, 0≦i≦15 and 0≦j≦15.
16. The method of claim 11 , wherein a number of RS parity bytes added to the mobile service data, a number of RS parity bytes added to the TPC data, and a number of RS parity bytes added to the FIC data are different from one another.
17. The method of claim 11 , further comprising controlling power to receive the data group including the mobile service data based on the TPC data.
18. The method of claim 11 , wherein one of the plurality of known data sequences is configured in a first pattern and the rest of the plurality of known data sequences is configured in a second pattern that is different from the first pattern.
19. The method of claim 11 , wherein reconstructing the TPC data and the FIC data comprises:
performing turbo decoding on data included in the signaling information region;
demultiplexing the TPC data and the FIC data from the turbo-decoded data;
correcting an error in the demultiplexed TPC data;
performing block deinterleaving on the demultiplexed FIC data; and
correcting an error in the block-deinterleaved FIC data.
20. The method of claim 19 , wherein performing block deinterleaving comprises deinterleaving the FIC data by TNoG (column)×51 (row) block units, wherein TNoG corresponds to a total number of data groups being assigned to all sub-frames within one transmission frame.