Apparatus for transmitting and receiving a signal and method of transmitting and receiving a signal
The present invention relates to a method of transmitting and a method of receiving signals and corresponding apparatus. One aspect of the present invention relates to an efficient layer 1 (L1) processing method for a transmitter and a receiver using data slices.
1. A transmitter for transmitting broadcasting data to a receiver, the transmitter comprising:
an LDPC (Low-density parity-check) encoder configured to LDPC encode Layer 1 signaling data to generate LDPC parity bits;
a puncturer configured to perform puncturing on the generated LDPC parity bits;
an interleaver configured to interleave the encoded Layer 1 signaling data on which the puncturing was performed;
a QAM (Quadrature Amplitude Modulation) mapper configured to map the interleaved encoded Layer 1 signaling data to Layer 1 signaling data symbols;
a frequency interleaver configured to frequency interleave the mapped Layer 1 signaling data symbols; and
a transmission unit configured to transmit a signal frame including the frequency-interleaved Layer 1 signaling data symbols, wherein the signal frame further includes PLP (Physical Layer Pipe) data symbols of a PLP carrying one or more services, 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.
2. The transmitter of claim 1 , further comprising:
a BCH (Bose-Chaudhuri-Hocquenghem) encoder configured to BCH encode the Layer 1 signaling data.
3. 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 encoded Layer 1 signaling data into Layer 1 signaling data symbols;
frequency interleaving the mapped Layer 1 signaling data symbols; and
transmitting a signal frame including the frequency-interleaved Layer 1 signaling data symbols, wherein the signal frame further includes PLP (Physical Layer Pipe) data symbols of a PLP carrying one or more services, 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 t4a-at-a change of the Layer 1 signaling data will change, and wherein the Layer 1 signaling data are repeated in the signal frame.
4. The method of claim 3 , further comprising:
BCH (Bose-Chaudhuri-Hocquenghem) encoding the Layer 1 signaling data.