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 7/16, 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, and the information matrix portion is represented by a parity check matrix initial value table, wherein the parity check matrix initial value table is a table showing in its i-th row, 1 ≤ i ≤ 21, 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 ≤ 21, 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 193 217 530 596 789 1340 1569 1662 1887 1889 2299 2610 2629 2790 3464 3607 3935 4439 5460 5721 5758 6094 6280 6350 6449 6613 6682 6826 6906 7048 7425 8229 8627 8679 8735 8814 9079 9146 435 572 815 903 1063 1962 1989 2215 2417 2862 2914 3182 3980 4414 4566 4895 4950 5163 5336 5388 5642 5764 6586 6719 6787 7262 7609 8000 8561 8790 9027 9334 9358 9420 9444 9553 9614 250 3557 3865 4350 4394 4644 5303 6590 8377 8497 9655 21 602 1038 1212 1243 3938 4136 5620 6516 6777 8226 134 214 1550 1554 1615 3178 5113 5163 5201 7168 7574 134 2692 3810 4954 6766 2394 4734 5731 7427 7653 509 1009 3867 5069 9121 540 2975 6248 4 831 3592 503 1385 7170 348 7774 8897 67 3553 5134 623 6525 8314 2871 7545 8960 4330 4839 7689 4793 5327 8046 2877 3422 8836 2069 7584 9102 1376 3862 4352 4693 7147 9461. 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 7/16, 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, and the information matrix portion is represented by a parity check matrix initial value table, wherein the parity check matrix initial value table is a table showing in its i-th row, 1 ≤ i ≤ 21, 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 ≤ 21, 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 193 217 530 596 789 1340 1569 1662 1887 1889 2299 2610 2629 2790 3464 3607 3935 4439 5460 5721 5758 6094 6280 6350 6449 6613 6682 6826 6906 7048 7425 8229 8627 8679 8735 8814 9079 9146 435 572 815 903 1063 1962 1989 2215 2417 2862 2914 3182 3980 4414 4566 4895 4950 5163 5336 5388 5642 5764 6586 6719 6787 7262 7609 8000 8561 8790 9027 9334 9358 9420 9444 9553 9614 250 3557 3865 4350 4394 4644 5303 6590 8377 8497 9655 21 602 1038 1212 1243 3938 4136 5620 6516 6777 8226 134 214 1550 1554 1615 3178 5113 5163 5201 7168 7574 134 2692 3810 4954 6766 2394 4734 5731 7427 7653 509 1009 3867 5069 9121 540 2975 6248 4 831 3592 503 1385 7170 348 7774 8897 67 3553 5134 623 6525 8314 2871 7545 8960 4330 4839 7689 4793 5327 8046 2877 3422 8836 2069 7584 9102 1376 3862 4352 4693 7147 9461. 193 217 530 596 789 1340 1569 1662 1887 1889 2299 2610 2629 2790 3464 3607 3935 4439 5460 5721 5758 6094 6280 6350 6449 6613 6682 6826 6906 7048 7425 8229 8627 8679 8735 8814 9079 9146 435 572 815 903 1063 1962 1989 2215 2417 2862 2914 3182 3980 4414 4566 4895 4950 5163 5336 5388 5642 5764 6586 6719 6787 7262 7609 8000 8561 8790 9027 9334 9358 9420 9444 9553 9614 250 3557 3865 4350 4394 4644 5303 6590 8377 8497 9655 21 602 1038 1212 1243 3938 4136 5620 6516 6777 8226 134 214 1550 1554 1615 3178 5113 5163 5201 7168 7574 134 2692 3810 4954 6766 2394 4734 5731 7427 7653 509 1009 3867 5069 9121 540 2975 6248 4 831 3592 503 1385 7170 348 7774 8897 67 3553 5134 623 6525 8314 2871 7545 8960 4330 4839 7689 4793 5327 8046 2877 3422 8836 2069 7584 9102 1376 3862 4352 4693 7147 9461.