Apparatus for transmitting broadcast signals, apparatus for receiving broadcast signals, method for transmitting broadcast signals and method for receiving broadcast signals

• US 9,774,893 B2
• Filed: 08/01/2014
• Issued: 09/26/2017
• Est. Priority Date: 08/01/2013
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Moon, Sangchul, Ko, Woosuk, Hong, Sungryong, Kim, Jinwoo, Shin, Jongwoong
• Primary Examiner(s): Bruckart, Benjamin R
• Assistant Examiner(s): Huang, Jen-Shi
• Application Number:
  US14/905,692
• Publication Number:
  US 20160165274A1
• Time in Patent Office: 1,152 Days
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0048 in conjunction with detection of multiuser or interfering signals, e.g. iteration between CDMA or MIMO detector and FEC decoder for spatial equalizer H04L25/03286
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04N 21/23614 Multiplexing of additional data and video streams arrangements for simultaneous broadcast of plural pieces of information H04H20/28
• CPC Class Codes: H04N 21/2362 Generation or processing of Service Information [SI]
• CPC Class Codes: H04N 21/2381 Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network transmission of MPEG streams over ATM H04L12/5601
• CPC Class Codes: H04N 21/2383 Channel coding or modulation of digital bit-stream, e.g. QPSK modulation arrangements for detecting or preventing errors in the information received by adapting the channel coding H04L1/0009; analogue front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/41407 embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop constructional details of equipment or arrangements specially adapted for portable computer application G06F1/1626; arrangements specially adapted for mobile receivers in broadcast systems H04H20/57
• CPC Class Codes: H04N 21/4345 Extraction or processing of SI, e.g. extracting service information from an MPEG stream
• CPC Class Codes: H04N 21/4348 Demultiplexing of additional data and video streams
• CPC Class Codes: H04N 21/4381 Recovering the multiplex stream from a specific network, e.g. recovering MPEG packets from ATM cells transmission of MPEG streams over ATM H04L12/5601
• CPC Class Codes: H04N 21/4382 Demodulation or channel decoding, e.g. QPSK demodulation analog front ends or means for connecting modulators, demodulators or transceivers to a transmission line H04L27/0002
• CPC Class Codes: H04N 21/6131 involving transmission via a mobile phone network wireless downlink channel access H04W74/006
• CPC Class Codes: H04N 21/814 comprising emergency warnings arrangements specially adapted for emergency or urgency in broadcast systems H04H20/59; arrangements for providing alarms, notifications, alerts to substation in data switching networks H04L12/1895

Abstract

The present invention provides a method of transmitting broadcast signals. The method includes, encoding Data Pipe, DP, data according to a code rate, wherein the encoding further includes Low-Density Parity-Check, LDPC, encoding the DP data, Bit interleaving the LDPC encoded DP data, and mapping the bit interleaved DP data onto constellations; building at least one signal frame by mapping the encoded DP data; and modulating data in the built signal frame by an Orthogonal Frequency Division Multiplexing, OFDM, method and transmitting the broadcast signals having the modulated data.

Claims

1. A method for transmitting broadcast signals, the method comprising:

encoding Data Pipe (DP) data according to a 16200 bit codeword and a 11/15 code rate based on a parity check matrix;

building at least one signal frame by mapping the encoded DP data;

modulating data in the built signal frame by Orthogonal Frequency Division Multiplexing (OFDM);

inserting a preamble at a beginning of each signal frame in a time domain; and

transmitting broadcast signals having the modulated data,

wherein the parity check matrix is;

49 719 784 794 968 2382 2685 2873 2974 2995 3540 4179

272 281 374 1279 2034 2067 2112 3429 3613 3815 3838 4216

206 714 820 1800 1925 2147 2168 2769 2806 3253 3415 4311

62 159 166 605 1496 1711 2652 3016 3347 3517 3654 4113

363 733 1118 2062 2613 2736 3143 3427 3664 4100 4157 4314

57 142 436 983 1364 2105 2113 3074 3639 3835 4164 4242

870 921 950 1212 1861 2128 2707 2993 3730 3968 3933 4227

185 2684 3263

2035 2123 2913

883 2221 3521

1344 1773 4132

438 3178 3650

543 756 1639

1057 2337 2898

171 3298 3929

1626 2960 3503

484 3050 3323

2283 2336 4189

2732 4132 4318

225 2335 3497

600 2246 2658

1240 2790 3020

301 1097 3539

1222 1267 2594

1364 2004 3603

1142 1185 2147

564 1505 2086

697 991 2908

1467 2073 3462

2574 2818 3637

748 2577 2772

1151 1419 4129

164 1238 3401, and

wherein, in the parity check matrix, each row corresponds to each group of 360 information bits, and each value in each row represents an address of a parity bit to be calculated.

2. The method of claim 1, wherein the preamble includes emergency alert information.

3. A method for receiving broadcast signals, the method comprising:

receiving broadcast signals having modulated data in signal frames;

detecting a preamble at a beginning of each signal frame in a time domain;

de-modulating the modulated data by Orthogonal Frequency Division Multiplexing (OFDM);

parsing at least one signal frame by de-mapping Data Pipe (DP) data; and

decoding the DP data according to a 16200 bit codeword and a 11/15 code rate based on a parity check matrix,

wherein the parity check matrix is;

49 719 784 794 968 2382 2685 2873 2974 2995 3540 4179

272 281 374 1279 2034 2067 2112 3429 3613 3815 3838 4216

206 714 820 1800 1925 2147 2168 2769 2806 3253 3415 4311

62 159 166 605 1496 1711 2652 3016 3347 3517 3654 4113

363 733 1118 2062 2613 2736 3143 3427 3664 4100 4157 4314

57 142 436 983 1364 2105 2113 3074 3639 3835 4164 4242

870 921 950 1212 1861 2128 2707 2993 3730 3968 3933 4227

185 2684 3263

2035 2123 2913

883 2221 3521

1344 1773 4132

438 3178 3650

543 756 1639

1057 2337 2898

171 3298 3929

1626 2960 3503

484 3050 3323

2283 2336 4189

2732 4132 4318

225 2335 3497

600 2246 2658

1240 2790 3020

301 1097 3539

1222 1267 2594

1364 2004 3603

1142 1185 2147

564 1505 2086

697 991 2908

1467 2073 3462

2574 2818 3637

748 2577 2772

1151 1419 4129

164 1238 3401, and

wherein, in the parity check matrix, each row corresponds to each group of 360 information bits, and each value in each row represents an address of a parity bit to be calculated.

4. The method of claim 3, wherein the preamble includes emergency alert information.