Apparatus for transmitting and receiving a signal and method of transmitting and receiving a signal

1. A transmitter for transmitting at least one broadcasting signal having PLP (Physical Layer Pipe) data to a receiver, the transmitter comprising:

an LDPC FEC Encoder configured to LDPC encode the PLP data and output FECFrame;

a mapper configured to convert the FECFrame to XFECFrame by QAM constellation;

a FEC-Frame-Header-Insertion configured to insert FECFrame header in front of the XFECFrame;

a data slice builder configured to output at least one data slice based on the XFECFrame and the FECFrame header;

a time-interleaver configured to perform time-interleaving at a level of the at least one data slice;

a frequency-interleaver configured to frequency-interleave the time-interleaved at least one data slice; and

a frame builder configured to build a signal frame based on the frequency-interleaved at least one data slice and preamble symbols having Layer-1 (L1) signaling information for signaling the at least one data slice.

2. The transmitter of claim 1 , wherein the FECFrame header comprises PLP ID Information and ModCod parameters.

3. The transmitter of claim 1 , wherein the time-interleaver is configured to perform the time-interleaving by row-column twisted fashion, wherein input cells are serially written into interleaving memory in a diagonal direction, and serially read out row-wise.

4. A receiver for receiving at least one broadcasting signal having PLP (Physical Layer Pipe), the receiver comprising:

a receiving unit configured to receive a signal frame including at least one data slice and preamble symbols having Layer-1 (L1) signaling information for signaling the at least one data slice;

a frequency-deinterleaver configured to frequency-deinterleave the received signal frame;

a time-deinterleaver configured to time-deinterleave the frequency-deinterleaved signal frame at a level of the at least one data slice;

a data slice parser configured to output data slice packets of PLP from the at least one data slice, the data slice packets including header;

a FEC-Frame-Header-Extractor configured to obtain the header from the data slice packets; and

a decoder configured to decode the data slice packets by LDPC (low density parity check) scheme.

5. The receiver of claim 4 , wherein the header comprises PLP ID information and ModCod (Modulation and Coding) parameters.

6. The receiver of claim 5 , wherein the receiver is configured to perform time-interleaving by row-column twisted fashion, wherein input cells are serially written into interleaving memory in a diagonal direction, and serially read out row-wise.

7. A method of transmitting at least one broadcasting signal having PLP (Physical Layer Pipe) data to a receiver, the method comprising:

LDPC-encoding the PLP data and outputting FECFrame;

mapping the FECFrame to XFECFrame by QAM constellation;

inserting FECFrame header in front of the XFECFrame;

building at least one data slice based on the XFECFrame and the FECFrame header;

time-interleaving at a level of the at least one data slice;

frequency-interleaving the time-interleaved at least one data slice; and

building a signal frame based on the frequency-interleaved at least one data slice and preamble symbols having Layer-1 (L1) signaling information for signaling the data slices.

8. The method of claim 7 , wherein the FECFrame header comprises PLP ID Information and ModCod parameters.

9. The method of claim 7 , wherein time-interleaving comprises time-interleaving by row-column twisted fashion, wherein input cells are serially written into interleaving memory in a diagonal direction, and serially read out row-wise.

10. A method of receiving at least one broadcasting signal having PLP (Physical Layer Pipe), the method comprising:

receiving a signal frame including at least one data slice and preamble symbols having Layer-1 (L1) signaling information for signaling the at least one data slice;

frequency-deinterleaving the received signal frame;

time-deinterleaving the frequency-deinterleaved signal frame at a level of the at least one data slice;

outputting data slice packets of PLP from the at least one data slice, the data slice packets including header;

obtaining the header from the data slice packets;

decoding the data slice packets by LDPC (low density parity check) decoding scheme.

11. The method of claim 10 , wherein the header comprises PLP ID information and ModCod (Modulation and Coding) parameters.

12. The method of claim 10 , further comprising time-interleaving by row-column twisted fashion, wherein input cells are serially written into interleaving memory in a diagonal direction, and serially read out row-wise.

13. The transmitter of claim 1 , wherein the preamble symbols include L1 blocks repeated in the frequency domain by 7.61 MHz, the L1 blocks including the L1 signaling information.

14. The method of claim 7 , wherein the preamble symbols include L1 blocks repeated in the frequency domain by 7.61 MHz, the L1 blocks including the L1 signaling information.