A transmitting apparatus comprising: a coding part configured to execute Low Density Parity Check, LDPC, coding to encode information bits into a code word of an LDPC code using a check matrix of the LDPC code whose code length is 736 bits and whose code rate is 1/4, wherein the LDPC code word includes the information bits and parity bits, the check matrix includes an information matrix portion of dimension MxK corresponding to the information bits and a parity matrix portion of dimension MxM corresponding to the parity bits, wherein K=184 and M=552, the parity matrix portion has a stepwise structure, in which elements of "1" are arranged in a step-wise fashion, in which the row weight is 1 of a first row and 2 in the remaining rows, and in which the column weight is 1 for the last column and 2 in the remaining columns, the information matrix portion is indicated by a check matrix initial value table, and the check matrix initial value table is a table showing in its i-th row, 1 ≤ i ≤ 23, the positions of elements "1" in the (1+8 x (i-1))-th column of the information matrix portion, and wherein based on each (1+8 x (i-1))-th column, 1 ≤ i ≤ 23, columns 2+8x(i-1) through 8xi of the information matrix portion are determined by cyclically downshifting the respective preceding column by M/8, and is given by: 1 7 90 172 209 359 401 420 483 487 57 164 192 197 284 307 174 356 408 425 22 50 191 379 385 396 427 445 480 543 32 49 71 234 255 286 297 312 537 550 30 70 88 111 176 201 283 322 419 499 86 94 177 193 266 368 373 389 475 529 134 223 242 254 285 319 403 496 503 534 18 84 106 165 170 199 321 355 386 410 129 158 226 269 288 316 397 413 444 549 33 113 133 194 256 305 318 380 507 317 354 402 53 64 374 83 314 378 162 259 280 166 281 486 185 439 489 119 156 224 26 62 244 8 246 482 15 72 91 43 69 390 127 186 506 55 81 412. a coding part configured to execute Low Density Parity Check, LDPC, coding to encode information bits into a code word of an LDPC code using a check matrix of the LDPC code whose code length is 736 bits and whose code rate is 1/4, wherein the LDPC code word includes the information bits and parity bits, the check matrix includes an information matrix portion of dimension MxK corresponding to the information bits and a parity matrix portion of dimension MxM corresponding to the parity bits, wherein K=184 and M=552, the parity matrix portion has a stepwise structure, in which elements of "1" are arranged in a step-wise fashion, in which the row weight is 1 of a first row and 2 in the remaining rows, and in which the column weight is 1 for the last column and 2 in the remaining columns, the information matrix portion is indicated by a check matrix initial value table, and the check matrix initial value table is a table showing in its i-th row, 1 ≤ i ≤ 23, the positions of elements "1" in the (1+8 x (i-1))-th column of the information matrix portion, and wherein based on each (1+8 x (i-1))-th column, 1 ≤ i ≤ 23, columns 2+8x(i-1) through 8xi of the information matrix portion are determined by cyclically downshifting the respective preceding column by M/8, and is given by: 1 7 90 172 209 359 401 420 483 487 57 164 192 197 284 307 174 356 408 425 22 50 191 379 385 396 427 445 480 543 32 49 71 234 255 286 297 312 537 550 30 70 88 111 176 201 283 322 419 499 86 94 177 193 266 368 373 389 475 529 134 223 242 254 285 319 403 496 503 534 18 84 106 165 170 199 321 355 386 410 129 158 226 269 288 316 397 413 444 549 33 113 133 194 256 305 318 380 507 317 354 402 53 64 374 83 314 378 162 259 280 166 281 486 185 439 489 119 156 224 26 62 244 8 246 482 15 72 91 43 69 390 127 186 506 55 81 412. 1 7 90 172 209 359 401 420 483 487 57 164 192 197 284 307 174 356 408 425 22 50 191 379 385 396 427 445 480 543 32 49 71 234 255 286 297 312 537 550 30 70 88 111 176 201 283 322 419 499 86 94 177 193 266 368 373 389 475 529 134 223 242 254 285 319 403 496 503 534 18 84 106 165 170 199 321 355 386 410 129 158 226 269 288 316 397 413 444 549 33 113 133 194 256 305 318 380 507 317 354 402 53 64 374 83 314 378 162 259 280 166 281 486 185 439 489 119 156 224 26 62 244 8 246 482 15 72 91 43 69 390 127 186 506 55 81 412.