Digital broadcast system for transmitting/receiving digital broadcast data, and data processing method for use in the same

• US 8,284,727 B2
• Filed: 01/27/2010
• Issued: 10/09/2012
• Est. Priority Date: 06/25/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Song, Jae Hyung, Choi, In Hwan, Hong, Ho Taek, Kwak, Kook Yeon, Kim, Byoung Gill, Suh, Jong Yeul, Kim, Jin Pil, Song, Won Gyu, Lee, Chul Soo, Kim, Jin Woo, Lee, Hyoung Gon, Lee, Joon Hui
• Primary Examiner(s): Mui, Gary
• Assistant Examiner(s): Choudhury, Faisal
• Application Number:
  US12/694,943
• Publication Number:
  US 20100131823A1
• Time in Patent Office: 986 Days
• Field of Search: 370/329, 714/784
• US Class Current: 370/329
• 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 13/271 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 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/006 Trellis-coded modulation
• 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 21/41407 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 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
• CPC Class Codes: H04N 21/44209 Monitoring of downstream path of the transmission network originating from a server, e.g. bandwidth variations of a wireless network arrangements for maintenance or administration in data switching networks involving bandwidth and capacity management H04L41/0896
• CPC Class Codes: H04N 21/4425 : Monitoring of client processing errors or hardware failure
• CPC Class Codes: H04N 21/6125 : involving transmission via Internet transmission by internet of broadcast information H04H60/82
• CPC Class Codes: H04N 21/64322 : IP
• CPC Class Codes: H04N 21/6433 : Digital Storage Media - Command and Control Protocol [DSM-CC]

Abstract

A digital broadcast system having storing resistance to errors generated during the transmission of mobile service data, and a data processing method are disclosed. The digital broadcast system additionally encodes mobile service data. As a result, the mobile service data has strong resistance to a channel variation and noise, and at the same time the system can quickly cope with the channel variation.

Claims

1. A method of processing a broadcast signal in a transmitting system, the method comprising:

performing Reed Solomon (RS) encoding and Cyclic Redundancy Check (CRC) encoding on mobile service data in order to generate an RS frame belonging to an ensemble comprising a service information table including access information of an IP stream for the mobile service data;

encoding transmission parameter channel (TPC) data and fast information channel (FIC) data with a first encoding code and, wherein the FIC data include information for rapid mobile service acquisition, and wherein the TPC data include FIC version information for indicating an update of the FIC data and RS frame mode information for indicating at least a single frame mode or a dual frame mode;

encoding data of the RS frame with a second encoding code;

mapping the encoded data of the RS frame to data groups, each of the data groups including regions A, B, C and D and comprising the encoded TPC data and FIC data and a plurality of known data sequences, wherein the encoded data of the RS frame are mapped to the regions A, B, C and D of each of the data groups when the RS frame mode information indicates the single frame mode, and wherein the encoded data of the RS frame are mapped to either the regions A and B or the regions C and D of each of the data groups when the RS frame mode information indicates the dual frame mode; and

transmitting the broadcast signal comprising data of the data groups,

wherein the RS frame comprises an RS frame payload including the mobile service data, RS parity data added at bottom ends of columns of the RS frame payload and CRC checksum data added at right ends of rows of the RS frame payload including the RS parity data, and

wherein the TPC data further include a first-assigned data group number for a parade and a parade identifier for identifying the parade, the parade being a collection of the data groups.

2. The method of claim 1, wherein the first encoding code is a Parallel Concatenated Convolutional Code (PCCC) and the second encoding code is a Serial Concatenated Convolutional Code (SCCC).

3. The method of claim 1, wherein at least two of the plurality of known data sequences have different lengths.

4. The method of claim 1, wherein the TPC and FIC data are inserted between a first known data sequence and a second known data sequence of the plurality of known data sequences.

5. A transmitting system comprising:

a Reed Solomon (RS) frame encoder for performing RS encoding and Cyclic Redundancy Check (CRC) encoding on mobile service data in order to generate an RS frame belonging to an ensemble comprising a service information table including access information of an IP stream for the mobile service data;

a signaling encoder for encoding transmission parameter channel (TPC) data and fast information channel (FIC) data with a first encoding code, wherein the FIC data include information for rapid mobile service acquisition, and wherein the TPC data include FIC version information for indicating an update of the FIC data and RS frame mode information for indicating at least a single frame mode or a dual frame mode;

a block processor for encoding data of the RS frame with a second encoding code;

a group formatter for mapping the encoded data of the RS frame to data groups, each of the data groups including regions A, B, C and D and comprising the encoded TPC data and FIC data and a plurality of known data sequences, wherein the encoded data of the RS frame are mapped to the regions A, B, C and D of each of the data groups when the RS frame mode information indicates the single frame mode, and wherein the encoded data of the RS frame are mapped to either the regions A and B or the regions C and D of each of the data groups when the RS frame mode information indicates the dual frame mode; and

a transmitting unit for transmitting a broadcast signal comprising data of the data groups,

wherein the RS frame comprises an RS frame payload including the mobile service data, RS parity data added at bottom ends of columns of the RS frame payload and CRC checksum data added at right ends of rows of the RS frame payload including the RS parity data, and

wherein the TPC data further include a first-assigned data group number for a parade and a parade identifier for identifying the parade, the parade being a collection of the data groups.

6. The transmitting system of claim 5, wherein the first encoding code is a Parallel Concatenated Convolutional Code (PCCC) and the second encoding code is a Serial Concatenated Convolutional Code (SCCC).

7. The transmitting system of claim 5, wherein at least two of the plurality of known data sequences have different lengths.

8. The transmitting system of claim 5, wherein the TPC and FIC data are inserted between a first known data sequence and a second known data sequence of the plurality of known data sequences.

9. A method of processing a broadcast signal in a receiving system, the method comprising:

receiving the broadcast signal, the broadcast signal comprising data groups comprising mobile service data, each of the data groups including regions A, B, C and D and comprising a plurality of known data sequences, fast information channel (FIC) data and transmission parameter channel (TPC) data;

demodulating the received broadcast signal;

decoding the FIC data and the TPC data of the demodulated broadcast signal,

wherein the FIC data include information for rapid mobile service acquisition,

wherein the TPC data include FIC version information for indicating an update of the FIC data, Reed Solomon (RS) frame mode information for indicating at least a single frame mode or a dual frame mode, a first-assigned data group number for a parade and a parade identifier for identifying the parade, the parade being a collection of the data groups,

wherein data of an RS frame are mapped to the regions A, B, C and D of each of the data groups when the RS frame mode information indicates the single frame mode and

wherein the data of the RS frame are mapped to either the regions A and B or the regions C and D of each of the data groups when the RS frame mode information indicates the dual frame mode;

performing Cyclic Redundancy Check (CRC)-decoding and RS-decoding on the RS frame belonging to an ensemble based on information of the TPC data, wherein the RS frame comprises an RS frame payload comprising the mobile service data of the demodulated broadcast signal, RS parity data added at bottom ends of columns of the RS frame payload and CRC checksum data added at right ends of rows of the RS frame payload including the RS parity data, and wherein the ensemble comprises a service information table including access information of an IP stream of the mobile service data;

acquiring the IP stream of the mobile service data based upon the access information of the service information table; and

decoding audio or video data delivered through the acquired IP stream of the mobile service data.

10. The method of claim 9, wherein at least two of the plurality of known data sequences have different lengths.

11. The method of claim 9, wherein the TPC data and the FIC data are inserted between a first known data sequence and a second known data sequence of the plurality of known data sequences.

12. The method of claim 9, wherein the TPC data and the FIC data are encoded with a first encoding code and the data of the RS frame are encoded with a second encoding code.

13. The method of claim 12, wherein the first encoding code is a Parallel Concatenated Convolutional Code (PCCC) and the second encoding code is a Serial Concatenated Convolutional Code (SCCC).

14. A receiving system comprising:

a tuner for receiving a broadcast signal, the broadcast signal comprising data groups comprising mobile service data, each of the data groups including regions A, B, C and D and comprising a plurality of known data sequences, fast information channel (FIC) data and transmission parameter channel (TPC) data;

a demodulator for demodulating the received broadcast signal;

a signaling decoder for decoding the FIC data and the TPC data of the demodulated broadcast signal,

wherein the FIC data include information for rapid mobile service acquisition,

wherein the TPC data include FIC version information for indicating an update of the FIC data, Reed Solomon (RS) frame mode information for indicating at least a single frame mode or a dual frame mode, a first-assigned data group number for a parade and a parade identifier for identifying the parade, the parade being a collection of the data groups,

wherein data of an RS frame are mapped to the regions A, B, C and D of each of the data groups when the RS frame mode information indicates the single frame mode and

wherein the data of the RS frame are mapped to either the regions A and B or the regions C and D of each of the data groups when the RS frame mode information indicates the dual frame mode;

a first decoder for performing Cyclic Redundancy Check (CRC)-decoding and RS-decoding on the RS frame belonging to an ensemble based on information of the TPC data, wherein the RS frame comprises an RS frame payload including the mobile service data of the demodulated broadcast signal, RS parity data added at bottom ends of columns of the RS frame payload and CRC checksum data added at right ends of rows of the RS frame payload including the RS parity data, and wherein the ensemble comprises a service information table including access information of an IP stream of the mobile service data;

a processor for acquiring the IP stream of the mobile service data based upon the access information of the service information table; and

a second decoder for decoding audio or video data delivered through the acquired IP stream of the mobile service data.

15. The receiving system of claim 14, wherein at least two of the plurality of known data sequences have different lengths.

16. The receiving system of claim 14, wherein the TPC data and the FIC data are inserted between a first known data sequence and a second known data sequence of the plurality of known data sequences.

17. The receiving system of claim 14, wherein the TPC data and the FIC data are encoded with a first encoding code and the data of the RS frame are encoded with a second encoding code.

18. The receiving system of claim 17, wherein the first encoding code is a Parallel Concatenated Convolutional Code (PCCC) and the second encoding code is a Serial Concatenated Convolutional Code (SCCC).