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

• US 8,098,646 B2
• Filed: 06/25/2008
• Issued: 01/17/2012
• 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): Lin, Kenny
• Assistant Examiner(s): Choudhury, Faisal
• Application Number:
  US12/146,319
• Publication Number:
  US 20090175218A1
• Time in Patent Office: 1,301 Days
• Field of Search: 370/349
• US Class Current: 370/349
• 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 receiving a broadcast signal, the method comprising:

receiving the broadcast signal including a transmission frame,

wherein the transmission frame includes a parade of data groups,

wherein the parade is a collection of data groups having same forward error correction (FEC) codes,

wherein the data groups include a plurality of regions,

wherein a first region of the plurality of regions is a center of a data group,

wherein a second region of the plurality of regions is concentric about the first region,

wherein a third region of the plurality of regions is concentric about the first region and the second region,

wherein a fourth region of the plurality of regions is concentric about the first region, the second region and the third region,

wherein the data groups include mobile service data, fast information channel (FIC) data, transmission parameter channel (TPC) data, and a plurality of known data sequences,

wherein the plurality of known data sequences is inserted into the first region and the second region of the plurality of regions,

wherein the FIC data includes information for rapid mobile service acquisition, and

wherein the TPC data includes FIC version information for indicating an update of the FIC data and Reed-Solomon (RS) frame mode information;

demodulating the received broadcast signal; and

decoding the demodulated broadcast signal to build RS frames according to the RS frame mode information,

wherein, when the RS frame mode information indicates a single mode, the parade carries a primary RS frame for the plurality of regions of the data groups,

wherein, when the RS frame mode information indicates a dual mode, the parade carries a primary RS frame for the first region and the second region of the plurality of regions and carries a secondary RS frame for the third region and the fourth region of the plurality of regions,

wherein the RS frames carry an ensemble that is a collection of same quality of services,

wherein each of the RS frames includes a plurality of packets, and

wherein the plurality of packets includes a signaling information table having access information of an Internet protocol (IP) stream for the mobile service data.

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

3. The method of claim 1, wherein:

when the RS frame mode information indicates the single mode, the primary RS frame carries a primary ensemble; and

when the RS frame mode information indicates the dual mode, the primary RS frame carries a primary ensemble, and the secondary RS frame carries a secondary ensemble.

4. The method of claim 1, wherein at least one of the plurality of known data sequences is repeated within a same pattern in the broadcast signal.

5. The method of claim 1, 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.

6. The method of claim 1, wherein the TPC data and FIC data are encoded with a first encoding code and the RS frames are encoded with a second encoding code.

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

8. A receiving system for receiving a broadcast signal, the receiving system comprising:

a tuner for receiving the broadcast signal including a transmission frame,

wherein the transmission frame includes a parade of data groups,

wherein the parade is a collection of data groups having same forward error correction (FEC) codes,

wherein the data groups include a plurality of regions,

wherein a first region of the plurality of regions is a center of a data group,

wherein a second region of the plurality of regions is concentric about the first region,

wherein a third region of the plurality of regions is concentric about the first region and the second region,

wherein a fourth region of the plurality of regions is concentric about the first region, the second region and the third region,

wherein the data groups include mobile service data, fast information channel (FIC) data, transmission parameter channel (TPC) data, and a plurality of known data sequences,

wherein the plurality of known data sequences is inserted into the first region and the second region of the plurality of regions,

wherein the FIC data includes information for rapid mobile service acquisition, and

wherein the TPC data includes FIC version information for indicating an update of the FIC data and Reed-Solomon (RS) frame mode information;

a demodulator for demodulating the received broadcast signal; and

a decoder for decoding the demodulated broadcast signal to build RS frames according to the RS frame mode information,

wherein, when the RS frame mode information indicates a single mode, the parade carries a primary RS frame for the plurality of regions of the data groups,

wherein, when the RS frame mode information indicates a dual mode, the parade carries a primary RS frame for the first region and the second region of the plurality of regions and carries a secondary RS frame for the third region and the fourth region of the plurality of regions,

wherein the RS frames carry an ensemble that is a collection of same quality of services,

wherein each of the RS frames includes a plurality of packets, and

wherein the plurality of packets includes a signaling information table having access information of an Internet protocol (IP) stream for the mobile service data.

9. The receiving system of claim 8, wherein at least two of the plurality of known data sequences have different lengths.

10. The receiving system of claim 8, wherein:

when the RS frame mode information indicates the single mode, the primary RS frame carries a primary ensemble; and

when the RS frame mode information indicates the dual mode, the primary RS frame carries a primary ensemble, and the secondary RS frame carries a secondary ensemble.

11. The receiving system of claim 8, wherein at least one of the plurality of known data sequences is repeated within a same pattern in the broadcast signal.

12. The receiving system of claim 8, 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.

13. The receiving system of claim 8, wherein the TPC data and FIC data are encoded with a first encoding code and the RS frames are encoded with a second encoding code.

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