DTV transmitting system and method of processing broadcast data

• US 8,689,086 B2
• Filed: 03/25/2013
• Issued: 04/01/2014
• Est. Priority Date: 04/29/2006
• Status: Expired due to Fees

• 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:
  US13/850,163
• Publication Number:
  US 20130232395A1
• Time in Patent Office: 372 Days
• Field of Search: 714/752, 714/756, 714/758, 714/776, 714/780, 714/784, 725/118
• US Class Current: 714/776
• 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 transmitting system, the method comprising:

Reed-Solomon (RS) and Cyclic Redundancy Check (CRC) encoding enhanced data bytes to build an RS frame;

block processing data bytes in the built RS frame, wherein block processing the data bytes comprises;

converting the data bytes in the built RS frame to data bits;

encoding each of the data bits at a 1/2 coding rate to output data symbols;

interleaving the data symbols; and

converting the interleaved data symbols to data bytes;

forming a data group including enhanced data corresponding to the data bytes converted from the interleaved data symbols, a plurality of known data sequences, and signaling information;

deinterleaving the enhanced data in the data group;

multiplexing the deinterleaved enhanced data with main data;

interleaving the multiplexed data; and

trellis encoding the interleaved data,

wherein;

encoding at the 1/2 coding rate is achieved by outputting a corresponding bit as a first output bit and outputting as a second output bit after encoding the corresponding bit;

one data symbol consists of the first output bit and the second output bit;

at least two of the plurality of known data sequences have different lengths; and

the signaling information includes data group information.

2. The method of claim 1, wherein the data group further includes place holder bytes for the main data.

3. The method of claim 2, further comprising:

removing the place holder bytes for the main data in the data group.

4. The method of claim 1, wherein:

the data group comprises a first segments part, a second segments part and a third segments part;

the first segments part is located at a central position of the data group;

the second segments part is concentric about the first segments part in the data group; and

the third segments part is concentric about the first segments part and the second segments part in the data group.

5. The method of claim 4, wherein the plurality of known data sequences and the signaling information are included in the first segments part.

6. A transmitting system comprising:

a first encoder configured to Reed-Solomon (RS) and Cyclic Redundancy Check (CRC) encode enhanced data bytes to build an RS frame;

a block processor configured to process data bytes in the built RS frame, wherein the block processor comprises;

a byte to bit converter configured to convert the data bytes in the built RS frame to data bits;

a second encoder configured to encode each of the data bits at a 1/2 coding rate to output data symbols;

a first interleaver configured to interleave the data symbols; and

a symbol to byte converter configured to convert the interleaved data symbols to data bytes;

a group formatter configured to;

form a data group including enhanced data corresponding to the data bytes converted from the interleaved data symbols, a plurality of known data sequences and signaling information; and

deinterleave the enhanced data in the data group;

a multiplexer configured to multiplex the deinterleaved enhanced data with main data;

a second interleaver configured to interleave the multiplexed data; and

a third encoder configured to trellis encode the interleaved data,

wherein;

encoding at the 1/2 coding rate is achieved by outputting a corresponding bit as a first output bit and outputting as a second output bit after encoding the corresponding bit;

one data symbol consists of the first output bit and the second output bit;

at least two of the plurality of known data sequences have different lengths; and

the signaling information includes data group information.

7. The transmitting system of claim 6, wherein the data group further includes place holder bytes for the main data.

8. The transmitting system of claim 7, further comprising:

a packet formatter configured to remove the place holder bytes for the main data in the data group.

9. The transmitting system of claim 6, wherein:

the data group comprises a first segments part, a second segments part and a third segments part;

the first segments part is located at a central position of the data group;

the second segments part is concentric about the first segments part in the data group; and

the third segments part is concentric about the first segments part and the second segments part in the data group.

10. The transmitting system of claim 9, wherein the plurality of known data sequences and the signaling information are included in the first segments part.