BROADCASTING RECEIVER AND BROADCAST SIGNAL PROCESSING METHOD

• US 20090044072A1
• Filed: 07/02/2008
• Published: 02/12/2009
• Est. Priority Date: 07/02/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Byoung Gill, Lee, Hyoung Gon, Choi, In Hwan, Oh, Hyen O., Song, Won Gyu, Kwak, Kook Yeon, Kim, Jin Woo
• Granted Patent: US 8,074,152 B2
• Time in Patent Office: Days
• US Class Current: 714/758
• 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. A broadcasting receiver comprising:

a receiver which receives a broadcast signal including mobile service data and main service data,

in which the mobile service data is able to construct a RS frame, and the RS frame includes at least one data packet of the mobile service data, a RS parity generated on the basis of the at least one data packet, a CRC checksum generated on the basis of the at least one data packet and the RS parity;

a RS frame decoder for performing a CRC decoding and a RS decoding on the RS frame, and correcting errors encountered in the mobile service data; and

a decoder for extracting audio data from an audio stream contained in the mobile service data, decoding the audio data on the basis of Huffman table information and area division information contained in the audio data, dequantizing the decoded audio data, and restoring an audio signal.

2. The broadcasting receiver according to claim 1, wherein the mobile service data configures a data group, and the data group is divided into a plurality of regions, known data streams are linearly inserted into some of the plurality of regions, and initialization data used for initializing a memory in a trellis encoder of a transmitter is located at a start portion of the known data stream.

3. The broadcasting receiver according to claim 1, wherein the mobile service data is able to construct a data group, the data group is divided into several areas, N number of known data streams are inserted into some areas from among the several areas, and a transmission parameter is inserted between a first known data stream and a second known data stream from among the N number of known data streams.

4. The broadcasting receiver according to claim 1, wherein the audio area division information indicates that the audio data is divided into several units according to individual frequency areas, and the Huffman table information indicates a Huffman table which is selected according to the individual areas of the audio data.

5. The broadcasting receiver according to claim 1, wherein the demultiplexed audio stream includes a header, Cyclic Redundancy Checking data, audio data, and additional data.

6. The broadcasting receiver according to claim 5, wherein the addition data includes an arrangement bitstream for adjusting a specific bit unit.

7. The broadcasting receiver according to claim 5, wherein the addition data includes padding data for adjusting a bitrate.

8. The broadcasting receiver according to claim 1, wherein the decoder includes:

a bit demultiplexer for extracting the audio data and the additional information from the demultiplexed audio stream; and

an Advanced Audio Coding (AAC) decoder for decoding the audio data on the basis of Huffman table information and area division information contained in the audio data, dequantizing the decoded audio data, and restoring an audio signal.

9. A method for processing a broadcast signal comprising:

a) receiving a broadcast signal including mobile service data and main service data;

b) performing a CRC decoding and a RS decoding on a RS frame, and correcting errors encountered in the mobile service data; and

c) extracting audio data from an audio stream contained in the mobile service data, decoding the audio data on the basis of Huffman table information and area division information contained in the audio data, dequantizing the decoded audio data, and restoring an audio signal,

in which the mobile service data is able to construct the RS frame, and the RS frame includes at least one data packet of the mobile service data, a RS parity generated on the basis of the at least one data packet, a CRC checksum generated on the basis of the at least one data packet and the RS parity.

10. The method according to claim 9, wherein the mobile service data configures a data group, and the data group is divided into a plurality of regions, known data streams are linearly inserted into some of the plurality of regions, and initialization data used for initializing a memory in a trellis encoder of a transmitter is located at a start portion of the known data stream.

11. The method according to claim 9, wherein the mobile service data is able to construct a data group, the data group is divided into several areas, N number of known data streams are inserted into some areas from among the several areas, and a transmission parameter is inserted between a first known data stream and a second known data stream from among the N number of known data streams.

12. The method according to claim 9, wherein the audio area division information indicates that the audio data is divided into several units according to individual frequency areas, and the Huffman table information indicates a Huffman table which is selected according to the individual areas of the audio data.

13. The method according to claim 9, wherein the demultiplexed audio stream includes a header, Cyclic Redundancy Checking data, audio data, and additional data.

14. The method according to claim 13, wherein the addition data includes an arrangement bitstream for adjusting a specific bit unit.

15. The method according to claim 9, wherein the addition data includes padding data for adjusting a bitrate.