Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals
The present invention provides a method of transmitting broadcast signals. The method includes, encoding Data Pipe, DP, data according to a code rate, wherein the encoding further includes Low-Density Parity-Check, LDPC, encoding the DP data, Bit interleaving the LDPC encoded DP data, and mapping the bit interleaved DP data onto constellations; building at least one signal frame by mapping the encoded DP data; and modulating data in the built signal frame by an Orthogonal Frequency Division Multiplexing, OFDM, method and transmitting the broadcast signals having the modulated data.
1. A method for transmitting broadcast signals, the method comprising:
encoding Data Pipe (DP) data according to a 16200 bit codeword and a 11/15 code rate based on a parity check matrix;
building at least one signal frame by mapping the encoded DP data;
modulating data in the built signal frame by Orthogonal Frequency Division Multiplexing (OFDM);
inserting a preamble at a beginning of each signal frame in a time domain; and
transmitting broadcast signals having the modulated data,
wherein the parity check matrix is:
49 719 784 794 968 2382 2685 2873 2974 2995 3540 4179
272 281 374 1279 2034 2067 2112 3429 3613 3815 3838 4216
206 714 820 1800 1925 2147 2168 2769 2806 3253 3415 4311
62 159 166 605 1496 1711 2652 3016 3347 3517 3654 4113
363 733 1118 2062 2613 2736 3143 3427 3664 4100 4157 4314
57 142 436 983 1364 2105 2113 3074 3639 3835 4164 4242
870 921 950 1212 1861 2128 2707 2993 3730 3968 3933 4227
185 2684 3263
2035 2123 2913
883 2221 3521
1344 1773 4132
438 3178 3650
543 756 1639
1057 2337 2898
171 3298 3929
1626 2960 3503
484 3050 3323
2283 2336 4189
2732 4132 4318
225 2335 3497
600 2246 2658
1240 2790 3020
301 1097 3539
1222 1267 2594
1364 2004 3603
1142 1185 2147
564 1505 2086
697 991 2908
1467 2073 3462
2574 2818 3637
748 2577 2772
1151 1419 4129
164 1238 3401, and
wherein, in the parity check matrix, each row corresponds to each group of 360 information bits, and each value in each row represents an address of a parity bit to be calculated.
2. The method of claim 1 , wherein the preamble includes emergency alert information.
3. A method for receiving broadcast signals, the method comprising:
receiving broadcast signals having modulated data in signal frames;
detecting a preamble at a beginning of each signal frame in a time domain;
de-modulating the modulated data by Orthogonal Frequency Division Multiplexing (OFDM);
parsing at least one signal frame by de-mapping Data Pipe (DP) data; and
decoding the DP data according to a 16200 bit codeword and a 11/15 code rate based on a parity check matrix,
wherein the parity check matrix is:
49 719 784 794 968 2382 2685 2873 2974 2995 3540 4179
272 281 374 1279 2034 2067 2112 3429 3613 3815 3838 4216
206 714 820 1800 1925 2147 2168 2769 2806 3253 3415 4311
62 159 166 605 1496 1711 2652 3016 3347 3517 3654 4113
363 733 1118 2062 2613 2736 3143 3427 3664 4100 4157 4314
57 142 436 983 1364 2105 2113 3074 3639 3835 4164 4242
870 921 950 1212 1861 2128 2707 2993 3730 3968 3933 4227
185 2684 3263
2035 2123 2913
883 2221 3521
1344 1773 4132
438 3178 3650
543 756 1639
1057 2337 2898
171 3298 3929
1626 2960 3503
484 3050 3323
2283 2336 4189
2732 4132 4318
225 2335 3497
600 2246 2658
1240 2790 3020
301 1097 3539
1222 1267 2594
1364 2004 3603
1142 1185 2147
564 1505 2086
697 991 2908
1467 2073 3462
2574 2818 3637
748 2577 2772
1151 1419 4129
164 1238 3401, and
wherein, in the parity check matrix, each row corresponds to each group of 360 information bits, and each value in each row represents an address of a parity bit to be calculated.
4. The method of claim 3 , wherein the preamble includes emergency alert information.