IP Library › Granted Patent US 11,239,863

Granted Patent B2

US 11,239,863 · App. 16/839,813 · Granted Feb 1, 2022

Data processing device and data processing method

Inventors: Ryoji Ikegaya (Kanagawa, JP); Makiko Yamamoto (Tokyo, JP); Yuji Shinohara (Kanagawa, JP)

Assignee: Saturn Licensing LLC

H03M13/2792 H03M13/036 H03M13/1137 H03M13/1165 H03M13/255 H03M13/271 H03M13/2906 H03M13/356 H03M13/616 H03M13/618 H03M13/152

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Quick Facts

Patent No.: US 11,239,863
App. No.: 16/839,813
Granted: Feb 1, 2022
Kind: B2

External Links

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Abstract

The present technology relates to a data processing device and a data processing method capable of securing excellent communication quality in data transmission using an LDPC code. In group-wise interleave, an LDPC code having a code length N of 64800 bits and a coding rate r of 9/15, 11/15, or 13/15 is interleaved in units of bit groups of 360 bits. In group-wise deinterleave, a sequence of LDPC codes after the group-wise interleave is returned to an original sequence. The present technology, for example, can be applied to a case where data transmission using an LDPC code or the like is performed.

Claims (534)

1. A receiving device for receiving digital television signals, the receiving device comprising:

a receiver configured to receive encoded data, each ten bits of which mapped to one of 1024 signal points of a modulation method; and

processing circuitry configured to

process the encoded data to produce a group-wise interleaved low density parity check (LDPC) codeword;

process the group-wise interleaved LDPC codeword in a unit of a bit group of 360 bits to produce an LDPC codeword of an LDPC code; wherein an (i+1)-th bit group from a head of the LDPC codeword of the LDPC code is indicated by a bit group i, the LDPC codeword of the LDPC codeword has a sequence of bit groups 0 to 179, and the group-wise interleaved LDPC codeword has a following sequence of bit groups,

49, 2, 57, 47, 31, 35, 24, 39, 59, 0, 45, 41, 55, 53, 51, 37, 33, 43, 56, 38, 48, 32, 50, 23, 34, 54, 1, 36, 44, 52, 40, 58, 122, 46, 42, 30, 3, 75, 73, 65, 145, 71, 79, 67, 69, 83, 85, 147, 63, 81, 77, 61, 5, 26, 62, 64, 74, 70, 82, 149, 76, 4, 78, 84, 80, 86, 66, 68, 72, 6, 60, 154, 103, 95, 101, 143, 9, 89, 141, 128, 97, 137, 133, 7, 13, 99, 91, 93, 87, 11, 136, 90, 88, 94, 10, 8, 14, 96, 104, 92, 132, 142, 100, 98, 12, 102, 152, 139, 150, 106, 146, 130, 27, 108, 153, 112, 114, 29, 110, 134, 116, 15, 127, 125, 123, 120, 148, 151, 113, 126, 124, 135, 129, 109, 25, 28, 158, 117, 105, 115, 111, 131, 107, 121, 18, 170, 164, 20, 140, 160, 166, 162, 119, 155, 168, 178, 22, 174, 172, 176, 16, 157, 159, 171, 161, 118, 17, 163, 21, 165, 19, 179, 177, 167, 138, 173, 156, 144, 169, and 175,

decode the LDPC codeword of the LDPC code to produce decoded data; and

process the decoded data for presentation;

wherein the LDPC code has a length N of 64800 bits and a coding rate r of 13/15 and corresponds to a parity check matrix initial value table including the following,

142 2307 2598 2650 4028 4434 5781 5881 6016 6323 6681 6698 8125

2932 4928 5248 5256 5983 6773 6828 7789 8426 8494 8534 8539 8583

899 3295 3833 5399 6820 7400 7753 7890 8109 8451 8529 8564 8602

21 3060 4720 5429 5636 5927 6966 8110 8170 8247 8355 8365 8616

20 1745 2838 3799 4380 4418 4646 5059 7343 8161 8302 8456 8631

9 6274 6725 6792 7195 7333 8027 8186 8209 8273 8442 8548 8632

494 1365 2405 3799 5188 5291 7644 7926 8139 8458 8504 8594 8625

192 574 1179 4387 4695 5089 5831 7673 7789 8298 8301 8612 8632

11 20 1406 6111 6176 6256 6708 6834 7828 8232 8457 8495 8602

6 2654 3554 4483 4966 5866 6795 8069 8249 8301 8497 8509 8623

21 1144 2355 3124 6773 6805 6887 7742 7994 8358 8374 8580 8611

335 4473 4883 5528 6096 7543 7586 7921 8197 8319 8394 8489 8636

2919 4331 4419 4735 6366 6393 6844 7193 8165 8205 8544 8586 8617

12 19 742 930 3009 4330 6213 6224 7292 7430 7792 7922 8137

710 1439 1588 2434 3516 5239 6248 6827 8230 8448 8515 8581 8619

200 1075 1868 5581 7349 7642 7698 8037 8201 8210 8320 8391 8526

3 2501 4252 5256 5292 5567 6136 6321 6430 6486 7571 8521 8636

3062 4599 5885 6529 6616 7314 7319 7567 8024 8153 8302 8372 8598

105 381 1574 4351 5452 5603 5943 7467 7788 7933 8362 8513 8587

787 1857 3386 3659 6550 7131 7965 8015 8040 8312 8484 8525 8537

15 1118 4226 5197 5575 5761 6762 7038 8260 8338 8444 8512 8568

36 5216 5368 5616 6029 6591 8038 8067 8299 8351 8565 8578 8585

1 23 4300 4530 5426 5532 5817 6967 7124 7979 8022 8270 8437

629 2133 4828 5475 5875 5890 7194 8042 8345 8385 8518 8598 8612

11 1065 3782 4237 4993 7104 7863 7904 8104 8228 8321 8383 8565

2131 2274 3168 3215 3220 5597 6347 7812 8238 8354 8527 8557 8614

5600 6591 7491 7696

1766 8281 8626

1725 2280 5120

1650 3445 7652

4312 6911 8626

15 1013 5892

2263 2546 2979

1545 5873 7406

67 726 3697

2860 6443 8542

17 911 2820

1561 4580 6052

79 5269 7134

22 2410 2424

3501 5642 8627

808 6950 8571

4099 6389 7482

4023 5000 7833

5476 5765 7917

1008 3194 7207

20 495 5411

1703 8388 8635

6 4395 4921

200 2053 8206

1089 5126 5562

10 4193 7720

1967 2151 4608

22 738 3513

3385 5066 8152

440 1118 8537

3429 6058 7716

5213 7519 8382

5564 8365 8620

43 3219 8603

4 5409 5815

5 6376 7654

4091 5724 5953

5348 6754 8613

1634 6398 6632

72 2058 8605

3497 5811 7579

3846 6743 8559

15 5933 8629

2133 5859 7068

4151 4617 8566

2960 8270 8410

2059 3617 8210

544 1441 6895

4043 7482 8592

294 2180 8524

3058 8227 8373

364 5756 8617

5383 8555 8619

1704 2480 4181

7338 7929 7990

2615 3905 7981

4298 4548 8296

8262 8319 8630

892 1893 8028

5694 7237 8595

1487 5012 5810

4335 8593 8624

3509 4531 5273

10 22 830

4161 5208 6280

275 7063 8634

4 2725 3113

2279 7403 8174

1637 3328 3930

2810 4939 5624

3 1234 7687

2799 7740 8616

22 7701 8636

4302 7857 7993

7477 7794 8592

9 6111 8591

5 8606 8628

347 3497 4033

1747 2613 8636

1827 5600 7042

580 1822 6842

232 7134 7783

4629 5000 7231

951 2806 4947

571 3474 8577

2437 2496 7945

23 5873 8162

12 1168 7686

8315 8540 8596

1766 2506 4733

929 1516 3338

21 1216 6555

782 1452 8617

8 6083 6087

667 3240 4583

4030 4661 5790

559 7122 8553

3202 4388 4909

2533 3673 8594

1991 3954 6206

6835 7900 7980

189 5722 8573

2680 4928 4998

243 2579 7735

4281 8132 8566

7656 7671 8609

1116 2291 4166

21 388 8021

6 1123 8369

311 4918 8511

0 3248 6290

13 6762 7172

4209 5632 7563

49 127 8074

581 1735 4075

0 2235 5470

2178 5820 6179

16 3575 6054

1095 4564 6458

9 1581 5953

2537 6469 8552

14 3874 4844

0 3269 3551

2114 7372 7926

1875 2388 4057

3232 4042 6663

9 401 583

13 4100 6584

2299 4190 4410

21 3670 4979.

2. The receiving device according to claim 1 , wherein the LDPC code uses a parity check matrix, which includes an information matrix part and a parity matrix part.

3. The receiving device according to claim 2 , wherein

the LDPC codeword includes information bits and parity bits; and

the information matrix part corresponds to the information bits and the parity matrix part corresponds to the parity bits.

4. The receiving device according to claim 3 , wherein

the parity matrix part is a lower bidiagonal matrix, in which elements of “1” are arranged in a step-wise fashion.

5. The receiving device according to claim 3 , wherein

the information matrix part is represented by the parity check matrix initial value table, and

the parity check matrix initial value table is a table showing in an i-th row, i>0, positions of elements “1” in (1+360×(i−1))-th column of the information matrix part.

6. The receiving device according to claim 5 , wherein

if a length of the parity bit of the LDPC codeword is represented by M, the z+360×(i−1)-th column of the parity check matrix, z>1, is obtained by the cyclic shift of the (z−1)+360×(i−1)-th column of the parity check matrix indicating a position of an element “1” in the parity check matrix initial value table downward by q=M/360.

7. The receiving device according to claim 6 , wherein

as for each column from the 2+360×(i−1)-th column to a 360×i-th column being the column other than the 1+360×(i−1)-th column of the parity check matrix,

if an i-th row j-th column value of the parity check matrix initial value table is represented as hi, j and the row number of a j-th element “1” of a w-th column of the parity check matrix is represented as Hw-j,

a row number Hw-j of the j-th element “1” of the w-th column being the column other than the 1+360×(i−1)-th column of the parity check matrix is represented by the equation

Hw - j =mod( hi,j +mod(( w− 1),360)× M/ 360, M ).

8. The receiving device according to claim 2 , wherein

the parity check matrix has no cycle-4.

9. The receiving device according to claim 1 , wherein

the input is a tuner.

10. The receiving device according to claim 1 , wherein

the modulation scheme employs non-uniform constellations (NUCs).

11. A method performed by a receiving device receiving digital television signals, the method comprising:

receiving encoded data, each 10 bits of which mapped to one of 1024 signal points of a modulation method;

processing the encoded data to produce a group-wise interleaved low density parity check (LDPC) codeword;

processing the group-wise interleaved LDPC codeword in a unit of a bit group of 360 bits to produce an LDPC codeword of an LDPC code; wherein an (i+1)-th bit group from a head of the LDPC codeword of the LDPC code is indicated by a bit group i, the LDPC codeword of the LDPC code has a sequence of bit groups 0 to 179, and the group-wise interleaved LDPC codeword has a following sequence of bit groups,

decoding the LDPC codeword of the LDPC code to produce decoded data; and

processing the decoded data for presentation;