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 an corresponding apparatus. One aspect of the present invention relates to an efficient L1 signaling method for an efficient transmitter and an efficient receiver using the efficient L1 signaling method for an efficient cable broadcasting.
1. A method for transmitting broadcast signals, the method comprising:
LDPC (Low Density Parity Check) encoding broadcast data that is carried by a physical path;
LDPC encoding signaling data, the LDPC encoded signaling data including a group identifier field for identifying a group to which a current physical path belongs;
time interleaving the LDPC encoded broadcast data by a twisted fashion, wherein the time interleaving is performed based on a skip operation;
building at least one signal frame by assembling the time interleaved broadcast data and the LDPC encoded signaling data; and
transmitting the broadcast signals including the built at least one signal frame.
2. The method of claim 1 , wherein:
the at least one signal frame includes at least one preamble symbol; and
the LDPC encoded signaling data is repeated in the at least one preamble symbol.
3. The method of claim 1 , further comprising bit interleaving the LDPC encoded broadcast data.
4. The method of claim 1 , wherein the LDPC encoded signaling data further includes time interleaving information.
5. An apparatus for transmitting broadcast signals, the apparatus comprising:
an encoder for LDPC (Low Density Parity Check) encoding broadcast data that is carried by a physical path;
a signaling encoder for LDPC encoding signaling data, the LDPC encoded signaling data including a group identifier field for identifying a group to which a current physical path belongs;
a time interleaver for time interleaving the LDPC encoded broadcast data by a twisted fashion, wherein the time interleaving is performed based on a skip operation;
a frame builder for building at least one signal frame by assembling the time interleaved broadcast data and the LDPC encoded signaling data; and
a transmitter for transmitting the broadcast signals including the built at least one signal frame.
6. The apparatus of claim 5 , wherein:
the at least one signal frame includes at least one preamble symbol; and
the LDPC encoded signaling data is repeated in the at least one preamble symbol.
7. The apparatus of claim 5 , further comprising a bit interleaver for bit interleaving the LDPC encoded broadcast data.
8. The transmitter of claim 5 , wherein the LDPC encoded signaling data further includes time interleaving information.
9. A method for receiving broadcast signals, the method comprising:
receiving the broadcast signals;
parsing at least one signal frame from the received broadcast signals, the at least one signal frame including signaling data and broadcast data, the broadcast data carried by a physical path and the signaling data including a group identifier field for identifying a group to which a current physical path belongs;
decoding the signaling data;
time deinterleaving the broadcast data by a twisted fashion, wherein the broadcast data is time interleaved based on a skip operation; and
LDPC (Low Density Parity Check) decoding the time deinterleaved broadcast data.
10. The method of claim 9 , wherein:
the at least one signal frame further includes at least one preamble symbol; and
the signaling data is repeated in the at least one preamble symbol.
11. The method of claim 9 , further comprising bit deinterleaving the time deinterleaved broadcast data.
12. The method of claim 9 , wherein the signaling data further includes time deinterleaving information.
13. An apparatus for receiving broadcast signals, the apparatus comprising:
a receiver for receiving the broadcast signals;
a frame parser for parsing at least one signal frame from the received broadcast signals, the at least one signal frame including signaling data and broadcast data, the broadcast data carried by a physical path and the signaling data including a group identifier field for identifying a group to which a current physical path belongs;
a signaling decoder for decoding the signaling data;
a time deinterleaver for time deinterleaving the broadcast data by a twisted fashion, wherein the broadcast data is time interleaved based on a skip operation; and
a decoder for LDPC (Low Density Parity Check) decoding the time deinterleaved broadcast data.
14. The apparatus of claim 13 , wherein:
the at least one signal frame further includes at least one preamble symbol; and
the signaling data is repeated in the at least one preamble symbol.
15. The apparatus of claim 13 , further comprising a bit deinterleaver for bit deinterleaving the time deinterleaved broadcast data.
16. The apparatus of claim 13 , wherein the signaling data further includes time deinterleaving information.