Broadcasting receiver and broadcast signal processing method

• US 8,023,525 B2
• Filed: 07/02/2008
• Issued: 09/20/2011
• Est. Priority Date: 07/02/2007
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Byoung Gill, Lee, Hyoung Gon, Choi, In Hwan, Song, Won Gyu, Kwak, Kook Yeon, Kim, Jin Woo, Oh, Hyen O
• Primary Examiner(s): TRAN, PHUC H
• Application Number:
  US12/167,238
• Publication Number:
  US 20090044231A1
• Time in Patent Office: 1,175 Days
• Field of Search: 370/312, 370/432
• US Class Current: 370/432
• CPC Class Codes: H03M 13/1515 Reed-Solomon codes
• 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 13/2909 Product codes
• CPC Class Codes: H03M 13/293 with erasure setting
• CPC Class Codes: H03M 13/2966 Turbo codes concatenated with another code, e.g. an outer block code
• CPC Class Codes: H03M 13/2972 Serial concatenation using convolutional component codes
• CPC Class Codes: H03M 13/356 Unequal error protection [UEP]
• 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 1/006 Trellis-coded modulation
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• 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 21/4381 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

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 configured to receive a broadcast signal including a transmission frame, wherein a parade of data groups is received within the transmission frame, each of the data groups including mobile service data, signaling information and a plurality of regions, the plurality of regions including a plurality of data blocks, wherein the signaling information is inserted in a specific data block of the plurality of data blocks;

a signaling information decoder configured to decode the signaling information in each of the data groups, wherein the decoded signaling information includes serial concatenated convolutional coding (SCCC) block mode information indicating a relationship between an SCCC block and a data block and Reed-Solomon (RS) frame mode information indicating a number of RS frames transmitted in the parade;

a block decoder configured to decode the mobile service data in each data of the groups by an SCCC block unit on the basis of the SCCC block mode information;

an RS frame decoder configured to build an RS frame including the decoded mobile service data on the basis of the RS frame mode information and perform RS decoding on the mobile service data in the RS frame;

a derandomizer configured to derandomize the RS-decoded mobile service data; and

a decoder configured to extract parameters from an audio stream included in the derandomized mobile service data and decode the audio stream using the extracted parameters to recover an audio signal.

2. The broadcasting receiver of claim 1, wherein known data sequences are inserted into specific regions of the plurality of regions and initialization data used for initializing a memory in a trellis encoder of a transmitter is located prior to each known data sequence.

3. The broadcasting receiver of claim 1, wherein N known data sequences are inserted into specific regions of the plurality of regions and the signaling information is inserted between a first known data sequence and a second known data sequence among the N known data sequences.

4. The broadcasting receiver of claim 1, wherein the decoder is further configured to additionally decode the recovered audio signal to recover an audio signal of a high-frequency area of a mono-channel when the parameters include spectral band replication (SBR) information.

5. The broadcasting receiver of claim 1, wherein the decoder is further configured to additionally decode the audio stream to recover an audio signal of a low-frequency area of a stereo-channel and an audio signal of a high-frequency area of the stereo-channel when the parameters include parametric stereo (PS) information.

6. A method for processing a broadcast signal, the method comprising:

receiving a broadcast signal including a transmission frame, wherein a parade of data groups is received within the transmission frame, each of the data groups including mobile service data, signaling information, and a plurality of regions, the plurality of regions including a plurality of data blocks, wherein the signaling information is inserted in a specific data block of the plurality of data blocks;

decoding the signaling information in the each of the data groups, wherein the decoded signaling information includes serial concatenated convolutional coding (SCCC) block mode information indicating a relationship between an SCCC block and a data block and Reed-Solomon (RS) frame mode information indicating a number of RS frames transmitted in the parade;

decoding the mobile service data in each of the data groups by an SCCC block unit on the basis of the SCCC block mode information;

building an RS frame including the decoded mobile service data on the basis of the RS frame mode information and RS decoding mobile service data in the RS frame;

derandomizing the RS-decoded mobile service data; and

extracting parameters from an audio stream included in the derandomized mobile service data and decoding the audio stream using the extracted parameters to recover an audio signal.

7. The method of claim 6, wherein known data sequences are inserted into specific regions of the plurality of regions and initialization data used for initializing a memory in a trellis encoder of a transmitter is located prior to each known data sequence.

8. The method of claim 6, wherein N known data sequences are inserted into specific regions of the plurality of regions and the signaling information is inserted between a first known data sequence and a second known data sequence among the N known data sequences.

9. The method of claim 6, wherein decoding the audio stream using the extracted parameters to recover the audio signal includes:

additionally decoding the recovered audio signal to recover an audio signal of a high-frequency area of a mono-channel when the parameters include spectral band replication (SBR) information.

10. The method of claim 6, wherein decoding the audio stream using the extracted parameters to recover the audio signal includes:

additionally decoding the recovered audio signal to recover an audio signal of a low-frequency area of a stereo-channel and an audio signal of a high-frequency area of the stereo-channel when the parameters include parametric stereo (PS) information.

11. A method of transmitting a broadcast signal, the method comprising;

encoding mobile data for forward error correction (FEC) to build Reed-Solomon (RS) frames according to RS frame mode information;

block encoding data in the RS frames by a serial concatenated convolutional coding (SCCC) block unit according to SCCC block mode information;

encoding signaling information, TPC data and FIC data, wherein the TPC data includes transmission frame information and the FIC data includes binding information between mobile services and ensembles, wherein each of the ensembles includes a collection of consecutive RS Frames with same FEC code, wherein the signaling information includes the SCCC block mode information indicating a relationship between an SCCC block and a data block and the RS frame mode information indicates a number of RS frames transmitted in a parade, the parade including a collection of data groups having same FEC parameters;

forming data groups including the encoded mobile data, wherein each of the data groups includes a plurality of regions, the plurality of regions including a plurality of data blocks, and inserting the encoded TPC data, encoded signaling information and encoded FIC data in the data groups, wherein the encoded TPC data, encoded signaling information and encoded FIC data are inserted into specific data blocks of the plurality of data blocks;

forming data packets including data in the data groups;

multiplexing data in the data packets and main data in main data packets; and

transmitting a transmission frame including the multiplexed data during a slot,

wherein the data groups include audio signals including parameters, and

wherein the parameters are generated on the basis of the audio signals.

12. The method of claim 11, wherein each of the data groups includes known data sequences inserted into specific regions of the plurality of regions.

13. The method of claim 11, wherein encoding the signaling information comprises:

Parallel Concatenated Convolutional Code (PCCC) encoding the encoded signaling information.

14. The method of claim 11, wherein the parameters include spectral band replication (SBR) information and parametric stereo (PS) information of an audio signal of an extended audio area, the extended audio area including a high-frequency area of a mono-channel, a low-frequency area and a high-frequency area of a stereo-channel.

15. An apparatus for transmitting a broadcast signal, the apparatus comprising;

a first encoder configured to encode mobile data for forward error correction (FEC) to build Reed-Solomon (RS) frames according to RS frame mode information;

a block encoder configured to block encode data in the RS frames by a serial concatenated convolutional coding (SCCC) block unit according to SCCC block mode information;

a second encoder configured to encode signaling information, wherein the signaling information includes the SCCC block mode information indicating a relationship between an SCCC block and a data block and the RS frame mode information indicates a number of RS frames transmitted in a parade, the parade including a collection of data groups having same FEC parameter;

a group formatter configured to form data groups including the encoded mobile data wherein each of the data groups includes a plurality of regions, the plurality of regions including a plurality of data blocks, and to insert the encoded signaling information in the data groups, wherein the encoded signaling information is inserted into specific data blocks of the plurality of data blocks;

a packet formatter configured to form data packets including data in the data groups;

a multiplexer configured to multiplex data in the data packets and main data in main data packets; and

a transmitter configured to transmit a transmission frame including the multiplexed data during a slot,

wherein the data groups include audio signals including parameters, and

wherein the parameters are generated on the basis of the audio signals.

16. The apparatus of claim 15, wherein each of the data groups includes known data sequences inserted into specific regions of the plurality of regions.

17. The apparatus of claim 15, further comprising:

a third encoder configured to Parallel Concatenated Convolutional Code (PCCC) encode the encoded signaling information.

18. The apparatus of claim 15, wherein the parameters include spectral band replication (SBR) information and parametric stereo (PS) information of an audio signal of an extended audio area, the extended audio area including a high-frequency area of a mono-channel, a low-frequency area and a high-frequency area of a stereo-channel.