IP Library › Granted Patent US 11,218,170

Granted Patent B2

US 11,218,170 · App. 17/012,598 · Granted Jan 4, 2022

Data processing apparatus and data processing method

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

Assignee: Saturn Licensing LLC

H03M13/1177 H03M13/036 H03M13/1165 H03M13/255 H03M13/271 H03M13/2707 H03M13/2906 H03M13/356 H04L1/0057 H04L1/0071 H03M13/152

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Quick Facts

Patent No.: US 11,218,170
App. No.: 17/012,598
Granted: Jan 4, 2022
Kind: B2

External Links

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Abstract

The present technology relates to a data processing apparatus and a data processing method which enable provision of an LDPC code that achieves good error-rate performance. An LDPC encoding unit performs encoding using an LDPC code having a code length of 64800 bits and a code rate of 24/30, 25/30, 26/30, 27/30, 28/30, or 29/30. The LDPC code includes information bits and parity bits, and a parity check matrix H is composed of an information matrix portion corresponding to the information bits of the LDPC code, and a parity matrix portion corresponding to the parity bits. The information matrix portion of the parity check matrix H is represented by a parity check matrix initial value table that shows positions of elements of 1 in the information matrix portion in units of 360 columns. The present technology may be applied to LDPC encoding and LDPC decoding.

Claims (1129)

1. A data processing apparatus for using an LDPC (Low Density Parity Check) code to enable error correction processing to correct errors generated in a transmission path of a television broadcast, the data processing apparatus comprising:

a receiver configured to select a code rate of 13/15 from a plurality of code rates and configured to receive, from a television broadcast, an LDPC code word based on an LDPC code having a code length of 64800 bits and the code rate of 13/15; and

a decoder configured to decode the LDPC code word on the basis of a parity check matrix of the LDPC code, wherein

the decoded LDPC code word comprising image data of the television broadcast for display,

the LDPC code word includes information bits and parity bits,

the parity check matrix includes an information matrix portion corresponding to the information bits and a parity matrix portion corresponding to the parity bits,

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 positions of elements of 1 in the information matrix portion in units of 360 columns,

wherein, in response to the selection of the code rate of 13/15, the parity check matrix initial value table includes

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 data processing apparatus according to claim 1 ,

wherein the receiver is configured to select a code rate of 10/15 from the plurality of code rates and configured to receive, from the television broadcast, an LDPC code word based on an LDPC code having a code length of 64800 bits and the code rate of 10/15; and

wherein, in response to the selection of the code rate of 10/15, the parity check matrix initial value table includes

692 1779 1973 2726 5151 6088 7921 9618 11804 13043 15975 16214 16889 16980

18585 18648

13 4090 4319 5288 8102 10110 10481 10527 10953 11185 12069 13177 14217

15963 17661 20959

2330 2516 2902 4087 6338 8015 8638 9436 10294 10843 11802 12304 12371 14095

18486 18996

125 586 5137 5701 6432 6500 8131 8327 10488 11032 11334 11449 12504 16000

20753 21317

30 480 2681 3635 3898 4058 12803 14734 20252 20306 20680 21329 21333 21466

21562 21568

20 44 738 4965 5516 7659 8464 8759 12216 14630 18241 18711 19093 20217 21316

21490

31 43 3554 5289 5667 8687 14885 16579 17883 18384 18486 19142 20785 20932

21131 21308

7054 9276 10435 12324 12354 13849 14285 16482 19212 19217 19221 20499 20831

20925 21195 21247

9 13 4099 10353 10747 14884 15492 17650 19291 19394 20356 20658 21068 21117

21183 21586

28 2250 2980 8988 10282 12503 13301 18351 20546 20622 21006 21293 21344

21472 21530 21542

17 32 2521 4374 5098 7525 13035 14437 15283 18635 19136 20240 21147 21179

21300 21349

57 4735 5657 7649 8807 12375 16092 16178 16379 17545 19461 19489 20321

20530 21453 21457

35 55 5333 14423 14670 15438 19468 19667 20823 21084 21241 21344 21447

21520 21554 21586

13 20 2025 11854 12516 14938 15929 18081 19730 19929 20408 21338 21391

21425 21468 21546

54 7451 8176 10136 15240 16442 16482 19431 19483 19762 20647 20839 20966

21512 21579 21592

26 465 3604 4233 9831 11741 13692 18953 18974 21021 21039 21133 21282 21488

21532 21558

1 7 16 59 6979 7675 7717 9791 12370 13050 18534 18729 19846 19864 20127

20165

15 31 11089 12360 13640 14237 17937 18043 18410 19443 21107 21444 21449

21528 21576 21584

32 51 9768 17848 18095 19326 19594 19618 19765 20440 20482 20582 21236

21338 21563 21587

44 55 4864 10253 11306 12117 13076 13901 15610 17057 18205 19794 20939

21132 21267 21573

3436 11304 15361 16511 16860 18238 18639 19341 20106 20123 20407 21200

21280 21452 21526 21569

679 8822 11045 14403 16588 17838 19117 19453 20265 20558 21374 21396 21428

21442 21529 21590

391 13002 13140 14314 17169 17175 17846 18122 19447 20075 20212 20436 20583

21330 21359 21403

7601 10257 20060 21285

4419 9150 18097 20315

4675 13376 21435

610 1238 16704

5732 7096 21104

5690 13531 14545

4334 14839 17357

8 2814 17674

2392 8128 18369

502 7403 15133

343 13624 20673

13188 15687 21593

321 16866 21347

1242 4261 17449

4691 8086 8691

8500 11538 20278

6269 12905 18192

5984 15452 17111

11541 18717 21534

16 10780 16107

12310 12959 20390

1365 18306 19634

6125 19132 20242

3012 17233 21533

5816 13021 21440

13207 17811 18798

2762 7586 12139

3949 5545 13584

11374 18279 19241

2736 10989 21209

4095 20677 21395

8251 10084 20498

7628 8875 21406

2743 8943 9090

1817 7788 15767

9333 9838 21268

6203 9480 12042

5747 21187 21468

2553 18281 21500

3179 9155 15222

12498 18109 20326

14106 21209 21592

7454 17484 20791

20804 21120 21574

5754 18178 20935

30 4322 21381

11905 20416 21397

12452 19899 21497

1917 6028 16868

9891 18710 18953

912 21083 21446

370 14355 18069

16519 19003 20902

11163 17558 18424

8427 14396 21405

8885 11796 21361

4960 15431 20653

11944 16839 21236

9967 14529 17208

14144 19354 19745

7986 12680 21396

6097 11501 13028

33 13803 21038

3177 20124 20803

2692 6841 18655

971 5892 14354

3887 19455 21271

17214 17315 21148

6539 13910 21526

3809 5153 15793

3865 21438 21510

7129 17787 19636

5972 13150 14182

7078 14906 16911

15705 21160 21482

5479 13860 19763

16817 19722 20001

14649 16147 18886

15138 18578 21502

2096 2534 17760

11920 13460 19783

19876 20071 20583

6241 14230 20775

16138 16386 21371

8616 15624 18453

6013 8015 21599

9184 10688 20792

18122 21141 21469

10706 13177 20957

15148 15584 20959

9114 9432 16467

5483 14687 14705

8325 21161 21410

2328 17670 19834

7015 20802 21385

52 5451 20379

9689 15537 19733.

3. The data processing apparatus according to claim 1 ,

wherein the receiver is configured to select a code rate of 11/15 from the plurality of code rates and configured to receive, from the television broadcast, an LDPC code word based on an LDPC code having a code length of 64800 bits and the code rate of 11/15; and

wherein, in response to the selection of the code rate of 11/15, the parity check matrix initial value table includes

696 989 1238 3091 3116 3738 4269 6406 7033 8048 9157 10254 12033 16456 16912

444 1488 6541 8626 10735 12447 13111 13706 14135 15195 15947 16453 16916

17137 17268

401 460 992 1145 1576 1678 2238 2320 4280 6770 10027 12486 15363 16714 17157

1161 3108 3727 4508 5092 5348 5582 7727 11793 12515 12917 13362 14247 16717

17205

542 1190 6883 7911 8349 8835 10489 11631 14195 15009 15454 15482 16632

17040 17063

17 487 776 880 5077 6172 9771 11446 12798 16016 16109 16171 17087 17132

17226

1337 3275 3462 4229 9246 10180 10845 10866 12250 13633 14482 16024 16812

17186 17241

15 980 2305 3674 5971 8224 11499 11752 11770 12897 14082 14836 15311 16391

17209

0 3926 5869 8696 9351 9391 11371 14052 14172 14636 14974 16619 16961 17033

17237

3033 5317 6501 8579 10698 12168 12966 14019 15392 15806 15991 16493 16690

17062 17090

981 1205 4400 6410 11003 13319 13405 14695 15846 16297 16492 16563 16616

16862 16953

1725 4276 8869 9588 14062 14486 15474 15548 16300 16432 17042 17050 17060

17175 17273

1807 5921 9960 10011 14305 14490 14872 15852 16054 16061 16306 16799 16833

17136 17262

2826 4752 6017 6540 7016 8201 14245 14419 14716 15983 16569 16652 17171

1717917247

1662 2516 3345 5229 8086 9686 11456 12210 14595 15808 16011 16421 16825

17112 17195

2890 4821 5987 7226 8823 9869 12468 14694 15352 15805 16075 16462 17102

17251 17263

3751 3890 4382 5720 10281 10411 11350 12721 13121 14127 14980 15202 15335

16735 17123

26 30 2805 5457 6630 7188 7477 7556 11065 16608 16859 16909 16943 17030

17103

40 4524 5043 5566 9645 10204 10282 11696 13080 14837 15607 16274 17034

17225 17266

904 3157 6284 7151 7984 11712 12887 13767 15547 16099 16753 16829 17044

17250 17259

7 311 4876 8334 9249 11267 14072 14559 15003 15235 15686 16331 17177 17238

17253

4410 8066 8596 9631 10369 11249 12610 15769 16791 16960 17018 17037 17062

17165 17204

24 8261 9691 10138 11607 12782 12786 13424 13933 15262 15795 16476 17084

17193 17220

88 11622 14705 15890

304 2026 2638 6018

1163 4268 11620 17232

9701 11785 14463 17260

4118 10952 12224 17006

3647 10823 11521 12060

1717 3753 9199 11642

2187 14280 17220

14787 16903 17061

381 3534 4294

3149 6947 8323

12562 16724 16881

7289 9997 15306

5615 13152 17260

5666 16926 17027

4190 7798 16831

4778 10629 17180

10001 13884 15453

6 2237 8203

7831 15144 15160

9186 17204 17243

9435 17168 17237

42 5701 17159

7812 14259 15715

39 4513 6658

38 9368 11273

1119 4785 17182

5620 16521 16729

16 6685 17242

210 3452 12383

466 14462 16250

10548 12633 13962

1452 6005 16453

22 4120 13684

5195 11563 16522

5518 16705 17201

12233 14552 15471

6067 13440 17248

8660 8967 17061

8673 12176 15051

5959 15767 16541

3244 12109 12414

31 15913 16323

3270 15686 16653

24 7346 14675

12 1531 8740

6228 7565 16667

16936 17122 17162

4868 8451 13183

3714 4451 16919

11313 13801 17132

17070 17191 17242

1911 11201 17186

14 17190 17254

11760 16008 16832

14543 17033 17278

16129 16765 17155

6891 15561 17007

12741 14744 17116

8992 16661 17277

1861 11130 16742

4822 13331 16192

13281 14027 14989

38 14887 17141

10698 13452 15674

4 2539 16877

857 17170 17249

11449 11906 12867

285 14118 16831

15191 17214 17242

39 728 16915

2469 12969 15579

16644 17151 17164

2592 8280 10448

9236 12431 17173

9064 16892 17233

4526 16146 17038

31 2116 16083

15837 16951 17031

5362 8382 16618

6137 13199 17221

2841 15068 17068

24 3620 17003

9880 15718 16764

1784 10240 17209

2731 10293 10846

3121 8723 16598

8563 15662 17088

13 1167 14676

29 13850 15963

3654 7553 8114

23 4362 14865

4434 14741 16688

8362 13901 17244

13687 16736 17232

46 4229 13394

13169 16383 16972

16031 16681 16952

3384 9894 12580

9841 14414 16165

5013 17099 17115

2130 8941 17266

6907 15428 17241

16 1860 17235

2151 16014 16643

14954 15958 17222

3969 8419 15116

31 15593 16984

11514 16605 17255.

4. The data processing apparatus according to claim 1 , wherein

a row of the parity check matrix initial value table is represented by i and a parity length of the LDPC code is represented by M,

a {2+360×(i−1)}-th column of the parity check matrix is a column obtained by cyclically shifting a {1+360×(i−1)}-th column of the parity check matrix, in which positions of elements of 1 are represented in the parity check matrix initial value table, downward by q, where q is equal to M/360.

5. The data processing apparatus according to claim 1 , wherein

for the {1+360×(i−1)}-th column of the parity check matrix,

an i-th row of the parity check matrix initial value table represents a row number of an element of 1 in the {1+360×(i−1)}-th column of the parity check matrix, and

for each of the {2+360×(i−1)}-th to (360×i)-th columns, which are columns other than the {1+360×(i−1)}-th column of the parity check matrix,

a row number of an element of 1 in a w-th column of the parity check matrix, which is a column other than the {1+360×(i−1)}-th column of the parity check matrix, is represented by equation H w-j =mod {h i,j +mod((w−1),360)×M/360, M),

where h i,j denotes a value in the i-th row and a j-th column of the parity check matrix initial value table, and H w-j denotes a row number of a j-th element of 1 in the w-th column of the parity check matrix H.

6. A television receiver comprising the data processing apparatus according to claim 1 .

7. The television receiver according to claim 6 , wherein the television receiver comprises an information source decoding processor and a display,

the decoder being configured to supply the image data after decoding of the LDPC code word to the information source decoding processor,

the information source decoding processor being configured to perform an information source decoding of the image data and to output images to the display.

8. The television receiver according to claim 6 , wherein the information bits include television broadcast program data.

9. The television receiver according to claim 6 , wherein the receiver is configured to receive the LDPC code word via a terrestrial link.

10. The television receiver according to claim 6 , wherein the receiver is configured to receive the LDPC code word via a satellite link.

11. A data processing method for using an LDPC (Low Density Parity Check) code to enable error correction processing to correct errors generated in a transmission path of a television broadcast, the method comprising:

receiving, from a television broadcast, an LDPC code word based on an LDPC code having a code length of 64800 bits and a code rate of 13/15, the receiving including selecting the code rate of 13/15 from a plurality of code rates; and

decoding the LDPC code word on the basis of a parity check matrix of the LDPC code, wherein