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

A method of transmitting broadcasting data to a receiver, the method comprising:

• LDPC (Low-density parity-check) encoding Layer 1 signaling data to generate LDPC parity bits;
• puncturing the generated LDPC parity bits;
• interleaving the encoded Layer 1 signaling data on which the puncturing was performed;
• mapping the interleaved Layer 1 signaling data into Layer 1 signaling data symbols;
• LDPC encoding PLP (Physical Layer Pipe) data of a PLP carrying one or more services;
• interleaving the encoded PLP data;
• mapping the interleaved PLP data into PLP data symbols;
• and
• transmitting a signal frame including the Layer 1 signaling data symbols and the PLP data symbols,
• wherein the PLP data symbols in the signal frame are located after the Layer 1 signaling data symbols for signaling the PLP,
• wherein the Layer 1 signaling data include information for indicating a change of the Layer 1 signaling data and identification information for identifying the PLP.

A transmitter for transmitting broadcasting data to a receiver, the transmitter comprising:

• a first encoder to LDPC encode Layer 1 signaling data to generate LDPC parity bits;
• a puncture to puncture the generated LDPC parity bits;
• a first interleaver to interleave the encoded Layer 1 signaling data on which the puncturing was performed;
• a first mapper to map the interleaved Layer 1 signaling data into Layer 1 signaling data symbols;
• a second encoder to LDPC encode PLP (Physical Layer Pipe) data of a PLP carrying one or more services;
• a second interleaver to interleave the encoded PLP data;
• a second mapper to map the interleaved PLP data into PLP data symbols;
• and
• a transmission unit to transmit a signal frame including the Layer 1 signaling data symbols and the PLP data symbols,
• wherein the PLP data symbols in the signal frame are located after the Layer 1 signaling data symbols for signaling the PLP,
• wherein the Layer 1 signaling data include information for indicating a change of the Layer 1 signaling data and identification information for identifying the PLP.