Broadcasting receiver and broadcast signal processing method

• US 8,074,152 B2
• Filed: 07/02/2008
• Issued: 12/06/2011
• Est. Priority Date: 07/02/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Oh, Hyen O, Choi, In Hwan, Kim, Byoung Gill, Song, Won Gyu, Kim, Jin Woo, Lee, Hyoung Gon, Kwak, Kook Yeon
• Primary Examiner(s): CHAUDRY, MUJTABA M
• Application Number:
  US12/167,234
• Publication Number:
  US 20090044072A1
• Time in Patent Office: 1,252 Days
• Field of Search: 714/784, 714/770
• US Class Current: 714/784
• CPC Class Codes: H03M 13/09 Error detection only, e.g. using cyclic redundancy check [CRC] codes or single parity bit
• CPC Class Codes: H03M 13/15 Cyclic codes, i.e. cyclic shifts of codewords produce other codewords, e.g. codes defined by a generator polynomial, Bose-Chaudhuri-Hocquenghem [BCH] codes H03M13/17 takes precedence
• CPC Class Codes: H03M 13/1515 Reed-Solomon codes
• CPC Class Codes: H03M 13/2707 Simple row-column interleaver, i.e. pure block interleaving
• CPC Class Codes: H03M 13/271 Row-column interleaver with permutations, e.g. block interleaving with inter-row, inter-column, intra-row or intra-column permutations
• 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 13/293 with erasure setting
• CPC Class Codes: H03M 13/2936 comprising an outer Reed-Solomon code and an inner convolutional code
• CPC Class Codes: H03M 13/2966 Turbo codes concatenated with another code, e.g. an outer block code
• CPC Class Codes: H03M 13/356 Unequal error protection [UEP]
• CPC Class Codes: H03M 13/4146 soft-output Viterbi decoding according to Battail and Hagenauer in which the soft-output is determined using path metric differences along the maximum-likelihood path, i.e. "SOVA" decoding
• CPC Class Codes: H03M 13/6356 by repetition or insertion of dummy data, i.e. rate reduction
• CPC Class Codes: H03M 13/6561 Parallelized implementations
• CPC Class Codes: H04H 40/18 Arrangements characterised by circuits or components specially adapted for receiving
• CPC Class Codes: H04H 60/11 Arrangements for counter-measures when a portion of broadcast information is unavailable
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06

Abstract

A digital broadcasting system which is robust against an error when mobile service data is transmitted and a method of processing data are disclosed. The mobile service data is subjected to an additional coding process and the coded mobile service data is transmitted. Accordingly, it is possible to cope with a serious channel variation while applying robustness to the mobile service data.

Claims

1. An apparatus for receiving a broadcast signal, the apparatus comprising:

a receiving unit configured to receive the broadcast signal including a transmission frame comprising a parade of data groups,

wherein each data group includes a plurality of regions comprising data blocks,

wherein a first region includes four central data blocks, a second region includes two data blocks which are concentric about the first region, a third region includes two data blocks which are concentric about the first and second regions, and a fourth region includes two data blocks which are concentric about the first, second, and third regions,

wherein the parade of data groups include mobile service data which constructs a primary Reed-Solomon (RS) frame or primary and secondary RS frames according to an RS Frame mode information,

wherein the RS frame mode information indicates a single frame mode or a dual frame mode, and

wherein the primary RS frame is built per the parade of data groups when the RS frame mode information indicates the single frame mode, and the primary and secondary RS frames are built per the parade of data groups when the RS frame mode information indicates the dual frame mode;

a RS frame decoder configured to perform Cyclic Redundancy Checking (CRC) decoding and RS decoding on data located in the primary RS frame or the primary and secondary RS frames according to the RS frame mode information; and

a decoder configured to decode audio data in an audio stream of the mobile service data according to Huffman table information.

2. The apparatus of claim 1, wherein each data group includes known data sequences and the known data sequences are inserted into the first region and the second region of the plurality of regions.

3. The apparatus of claim 1, wherein each data group includes known data sequences and signaling data having the RS frame mode information, and

wherein the known data sequences are inserted into the first region and the second region of the plurality of regions, and the signaling data is inserted between a first known data sequence and a second known data sequence.

4. The apparatus of claim 1, wherein the decoder further comprises:

an extracting unit configured to extract the audio data from the audio stream;

a decoding unit configured to decode the extracted audio data according to the Huffman table information; and

a dequantizing unit configured to dequantize the decoded audio data to restore an audio signal.

5. A method of receiving a broadcast signal, the method comprising:

receiving the broadcast signal including a transmission frame comprising a parade of data groups,

wherein each data group includes a plurality of regions comprising data blocks,

wherein a first region includes four central data blocks, a second region includes two data blocks which are concentric about the first region, a third region includes two data blocks which are concentric about the first and second regions, and a fourth region includes two data blocks which are concentric about the first, second and third regions,

wherein the parade of data groups include mobile service data which constructs a primary Reed-Solomon (RS) frame or primary and secondary RS frames according to an RS Frame mode information,

wherein the RS frame mode information indicates a single frame mode or a dual frame mode, and

wherein the primary RS frame is built per the parade of data groups when the RS frame mode information indicates the single frame mode, and the primary and secondary RS frames are built per the parade of data groups when the RS frame mode information indicates the dual frame mode;

performing a Cyclic Redundancy Checking (CRC) decoding and a RS decoding on data in the primary RS frame or the primary and secondary RS frames according to the RS frame mode information; and

decoding audio data in an audio stream of the mobile service data according to Huffman table information.

6. The method of claim 5, wherein each data group includes known data sequences and the known data sequences are inserted into the first region and the second region of the plurality of regions.

7. The method of claim 5, wherein the each data group includes known data sequences and signaling data having the RS frame mode information, and

wherein the known data sequences are inserted into the first region and the second region of the plurality of regions and the signaling data is inserted between a first known data sequence and a second known data sequence.

8. The method of claim 5, wherein the method further comprises:

extracting the audio data from the audio stream of the mobile service data;

decoding the extracted audio data on according to the Huffman table information; and

dequantizing the decoded audio data to restore the audio signal.

9. An apparatus for transmitting a broadcast signal, the apparatus comprising:

an encoder configured to encode mobile data for Forward Error Correction (FEC) to build a primary Reed-Solomon (RS) frame or primary and secondary RS frames according to an RS Frame mode information,

wherein the RS frame mode information indicates a single frame mode or a dual frame mode,

wherein the primary RS frame is to be built per a parade of data groups when the RS frame mode information indicates the single frame mode or the primary and secondary RS frames are to be built per the parade of data groups when the RS frame mode information indicates the dual frame mode;

a divider configured to divide the built primary RS frame or the primary and secondary RS frames into a plurality of portions;

a Serial Concatenated Convolutional Coding (SCCC) block processor configured to block process one of the plurality of portions by an SCCC block unit;

a group formatter configured to form data groups including the SCCC block processed mobile data and signaling data having the RS frame mode information,

wherein each data group includes a plurality of regions comprising data blocks, and

wherein a first region includes four central data blocks, a second region includes two data blocks which are concentric about the first region, a third region includes two data blocks which are concentric about the first and second regions, and a fourth region includes two data blocks which are concentric about the first, second and third regions;

a transmission unit configured to transmit a transmission frame including a parade of data groups,

wherein the plurality of regions in the data groups include only data from primary RS frame when the RS frame mode information is the single mode,

wherein the first region and the second region in the data groups include data from the primary RS frame, and the third region and the fourth region in the data groups include data from the secondary RS frame when the RS frame mode is the dual mode, and

wherein the data groups include audio data encoded according to Huffman table information.

10. The apparatus of claim 9, wherein the apparatus further comprises:

a signaling encoder configured to encode the signaling data.

11. The apparatus of claim 9, wherein each data group includes known data sequences and the known data sequences are inserted into the first and second regions of the plurality of regions, and initialization data used for initializing a memory in a trellis encoder of the apparatus of transmitting is inserted in front of each known data sequences.

12. The apparatus of claim 9, wherein each data group includes known data sequences and the known data sequences are inserted into the first and second regions of the plurality of regions, and

wherein the signaling data is inserted between a first known data sequence and a second known data sequence.

13. A method for transmitting a broadcast signal, the method comprising:

encoding mobile data for Forward Error Correction (FE) to build a primary Reed-Solomon (RS) frame or primary and secondary RS frames according to RS Frame mode information indicating a single frame mode or a dual frame mode,

wherein the primary RS frame is built per a parade or when the RS frame mode information indicates the single frame mode and the primary and secondary RS frames are built per the parade when the RS frame mode information indicates the dual frame mode;

dividing the built primary RS frame or the primary and secondary RS frames into a plurality of portions;

Serial Concatenated Convolutional Coding (SCCC) block processing one of the plurality of portions by an SCCC block unit;

forming data groups including the SCCC block processed mobile data and signaling data having the RS frame mode information,

wherein each data group includes a plurality of regions comprising data blocks, and

wherein a first region includes four central data blocks, a second region includes two data blocks which are concentric about the first region, a third region includes two data blocks which are concentric about the first and second regions, and a fourth region includes two data blocks which are concentric about the first, second, and third regions;

transmitting a transmission frame including a parade of data groups,

wherein the plurality of regions in the data groups include only data from the primary RS frame when the RS frame mode information is the single mode,

wherein the first region and the second region in the data groups include data from the primary RS frame, and the third region and the fourth region in the data groups include data from the secondary RS frame when the RS frame mode is the dual mode, and

wherein the data groups include audio data coded according to Huffman table information.

14. The method for claim 13, the method further comprising:

encoding the signaling data.

15. The method of claim 13, wherein the each data group includes known data sequences and the known data sequences are inserted into the first region and the second region of the plurality regions, and initialization data used for initializing a memory in a trellis encoder of the apparatus of transmitting is inserted in front of each known data sequence.

16. The method of claim 13, wherein each data group includes known data sequences and the known data sequences are inserted into the first region and the second region of the plurality of regions, and

wherein the signaling data is inserted between a first known data sequence and a second known data sequence.