A transmission device comprising: an encoding unit configured to perform LDPC coding on the basis of a parity check matrix of an LDPC code with a code length N of 17280 bits and a code rate r of 9/16, wherein an LDPC code word of the LDPC code includes K information bits and M = N-K parity bits, the parity check matrix includes an MxK information matrix portion corresponding to the information bits and a MxM parity matrix portion corresponding to the parity bits, the parity matrix portion is a lower bidiagonal matrix in which elements of "1" are arranged in a step-like manner, wherein the row weight of the parity matrix portion is 1 in the 1st row and 2 in all the remaining rows and the column weight is 1 in the last column and 2 in all the remaining columns, the information matrix portion is represented by a parity check matrix initial value table, and the parity check matrix initial value table is a table showing in its i-th row, 1 ≤ i ≤ 27, the positions of elements "1" in the 1+360x(i-1)-th column of the information matrix portion, and wherein based on each 1+360x(i-1)-th column, 1 ≤ i ≤ 27, columns 2+360x(i-1) through 360xi of the information matrix portion are determined by cyclically shifting downward the respective preceding column by M/360, and is given by 291 817 1023 1118 1168 1195 1419 1763 2507 3005 3886 3952 4046 4924 5372 5586 5742 5925 6080 6157 6301 6600 6644 7052 7093 7105 7487 133 565 957 1018 1150 1196 1210 1224 1361 1484 2330 2448 2525 2583 2639 3198 3407 3504 4272 4383 5133 5399 5421 5545 6972 7156 129 365 541 1026 1199 1527 2467 3386 3458 4215 4438 4778 5176 5484 5521 5540 5788 6103 6287 6360 6605 6745 6973 7251 7329 7336 996 1392 2493 2910 3048 3281 4969 5189 5632 6236 6983 165 2521 2650 2824 3493 4637 5670 6470 266 345 390 2365 2843 3274 4321 5165 245 2173 2274 2687 3763 4284 5562 6564 2787 2970 3503 691 3718 5047 593 969 3593 331 3809 6269 1627 2886 5935 1046 2976 4457 4725 6028 6458 6172 6610 7530 1536 7102 7148 233 2463 4955 826 4319 6969 3073 6675 6774 407 4251 7087 1380 3802 4937 1911 4360 6306 4027 6219 7292 398 1190 1936 250 830 7241 5500 5828 7478 1261 4649 7237. an encoding unit configured to perform LDPC coding on the basis of a parity check matrix of an LDPC code with a code length N of 17280 bits and a code rate r of 9/16, wherein an LDPC code word of the LDPC code includes K information bits and M = N-K parity bits, the parity check matrix includes an MxK information matrix portion corresponding to the information bits and a MxM parity matrix portion corresponding to the parity bits, the parity matrix portion is a lower bidiagonal matrix in which elements of "1" are arranged in a step-like manner, wherein the row weight of the parity matrix portion is 1 in the 1st row and 2 in all the remaining rows and the column weight is 1 in the last column and 2 in all the remaining columns, the information matrix portion is represented by a parity check matrix initial value table, and the parity check matrix initial value table is a table showing in its i-th row, 1 ≤ i ≤ 27, the positions of elements "1" in the 1+360x(i-1)-th column of the information matrix portion, and wherein based on each 1+360x(i-1)-th column, 1 ≤ i ≤ 27, columns 2+360x(i-1) through 360xi of the information matrix portion are determined by cyclically shifting downward the respective preceding column by M/360, and is given by 291 817 1023 1118 1168 1195 1419 1763 2507 3005 3886 3952 4046 4924 5372 5586 5742 5925 6080 6157 6301 6600 6644 7052 7093 7105 7487 133 565 957 1018 1150 1196 1210 1224 1361 1484 2330 2448 2525 2583 2639 3198 3407 3504 4272 4383 5133 5399 5421 5545 6972 7156 129 365 541 1026 1199 1527 2467 3386 3458 4215 4438 4778 5176 5484 5521 5540 5788 6103 6287 6360 6605 6745 6973 7251 7329 7336 996 1392 2493 2910 3048 3281 4969 5189 5632 6236 6983 165 2521 2650 2824 3493 4637 5670 6470 266 345 390 2365 2843 3274 4321 5165 245 2173 2274 2687 3763 4284 5562 6564 2787 2970 3503 691 3718 5047 593 969 3593 331 3809 6269 1627 2886 5935 1046 2976 4457 4725 6028 6458 6172 6610 7530 1536 7102 7148 233 2463 4955 826 4319 6969 3073 6675 6774 407 4251 7087 1380 3802 4937 1911 4360 6306 4027 6219 7292 398 1190 1936 250 830 7241 5500 5828 7478 1261 4649 7237.