DTV transmitting system and method of processing broadcast data

• US 9,178,536 B2
• Filed: 01/28/2015
• Issued: 11/03/2015
• Est. Priority Date: 04/29/2006
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Hyoung Gon, Choi, In Hwan, Kwak, Kook Yeon, Kim, Jong Moon, Song, Won Gyu, Kim, Byoung Gill, Kim, Jin Woo
• Primary Examiner(s): LAMARRE, GUY J
• Application Number:
  US14/607,640
• Publication Number:
  US 20150143205A1
• Time in Patent Office: 279 Days
• Field of Search: 714/752, 714/756, 714/758, 714/776, 714/780, 714/784, 714/755, 714/E11.03, 725/118, 375/265, 375/E7.026, 375/240.01, 375/301
• US Class Current: 1/1
• CPC Class Codes: H03M 13/1515 Reed-Solomon codes
• CPC Class Codes: H03M 13/2703 the interleaver involving at least two directions
• CPC Class Codes: H03M 13/2792 Interleaver wherein interleaving is performed jointly with another technique such as puncturing, multiplexing or routing
• CPC Class Codes: H03M 13/6522 Intended application, e.g. transmission or communication standard
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0047 Decoding adapted to other signal detection operation in conjunction with sequence estimation or equalization H04L25/03286
• CPC Class Codes: H04L 1/0054 Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
• CPC Class Codes: H04L 1/0058 Block-coded modulation
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/007 Unequal error protection for format H04L1/0078; for codes per se H03M13/35
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• 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 21/2383 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 21/4348 Demultiplexing of additional data and video streams
• CPC Class Codes: H04N 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
• 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

Abstract

A DTV transmitting system includes an encoder, a randomizer, a block processor, a group formatter, a deinterleaver, and a packet formatter. The encoder codes enhanced data for error correction, permutes the coded data, and further codes the permuted data for error detection. The randomizer randomizes the coded enhanced data, and the block processor codes the randomized data at an effective coding rate of 1/H. The group formatter forms a group of enhanced data having data regions, and inserts the coded enhanced data into at least one of the data regions. The deinterleaver deinterleaves the group of enhanced data, and the packet formatter formats the deinterleaved data into corresponding data bytes.

Claims

1. A method of processing broadcast data in a broadcast transmitter, the method comprising:

randomizing enhanced data;

FEC (Forward Error Correction) encoding the randomized enhanced data;

first interleaving the FEC-encoded enhanced data;

second interleaving the first interleaved enhanced data;

randomizing signaling data for signaling the enhanced data;

FEC encoding the randomized signaling data;

interleaving the FEC-encoded signaling data; and

transmitting the second interleaved enhanced data and the interleaved signaling data through a data unit,

wherein the data unit further includes known data, wherein the known data are categorized into a first pattern of known data and a second pattern of known data other than the first pattern of known data, and wherein at least one of the first pattern of known data and the second pattern of known data are used for channel estimation in a broadcast receiver.

2. The method of claim 1, wherein first interleaving performs block interleaving on the FEC-encoded enhanced data.

3. The method of claim 1, wherein second interleaving performs convolutional interleaving on the first interleaved enhanced data.

4. The method of claim 1, further comprising:

performing additional encoding on the enhanced data.

5. The method of claim 1, wherein the second type of known data are inserted into pre-determined positions within the data unit.

6. A broadcast transmitter for processing broadcast data, the broadcast transmitter comprising:

a randomizer to randomize enhanced data and to randomize signaling data for signaling the enhanced data;

an encoder to FEC (Forward Error Correction) encode the randomized enhanced data and to FEC encode the randomized signaling data;

a first interleaver to first interleave the FEC-encoded enhanced data and to interleave the FEC-encoded signaling data;

a second interleaver to second interleave the first interleaved enhanced data; and

a transmitting unit to transmit the second interleaved enhanced data and the interleaved signaling data through a data unit,

wherein the data unit further includes known data, wherein the known data are categorized into a first pattern of known data and a second pattern of known data other than the first pattern of known data, wherein at least one of the first pattern of known data and the second pattern of known data are used for channel estimation in a broadcast receiver.

7. The broadcast transmitter of claim 6, wherein the first interleaver performs block interleaving on the FEC-encoded enhanced data.

8. The broadcast transmitter of claim 6, wherein the second interleaver performs convolutional interleaving on the first interleaved enhanced data.

9. The broadcast transmitter of claim 6, further comprising:

an additional encoder for performing additional encoding on the enhanced data.

10. The broadcast transmitter of claim 6, wherein the second type of known data are inserted into pre-determined positions within the data unit.