METHOD OF PROCESSING TRAFFIC INFORMATION AND DIGITAL BROADCAST SYSTEM

• US 20110096798A1
• Filed: 12/06/2010
• Published: 04/28/2011
• Est. Priority Date: 10/05/2005
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: KIM, Jin Pil, Kim, Byoung Gill, Lee, Hyoung Gon, Hong, Ho Taek, Choi, In Hwan, Kim, Jong Moon, Kim, Young In, Song, Won Gyu, Kwak, Kook Yeon, Kim, Jin Woo
• Granted Patent: US 8,510,622 B2
• Time in Patent Office: Days
• US Class Current: 370/476
• CPC Class Codes: H04H 20/55 for traffic information
• 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 1/0089 in payload
• CPC Class Codes: H04L 2025/03382 Single of vestigal sideband
• CPC Class Codes: H04L 25/03171 Arrangements involving maximum a posteriori probability [MAP] detection
• CPC Class Codes: H04L 25/03203 Trellis search techniques
• CPC Class Codes: H04L 25/03318 Provision of soft decisions
• CPC Class Codes: H04L 25/03343 Arrangements at the transmitter end
• CPC Class Codes: H04L 27/04 Modulator circuits; Transmitter circuits

Abstract

A digital broadcast transmitting/receiving system and a method for processing data are disclosed. The method for processing data may enhance the receiving performance of the receiving system by performing additional coding and multiplexing processes on the traffic information data and transmitting the processed data. Thus, robustness is provided to the traffic information data, thereby enabling the data to respond strongly against the channel environment which is always under constant and vast change.

Claims

1-38. -38. (canceled)

39. A method of processing a digital broadcast signal for transmitting the digital broadcast signal, the method comprising:

Forward Error Correction (FEC) and CRC Cyclic Redundancy Check encoding enhanced service data to build at least one Reed-Solomon (RS) frame of the enhanced service data;

first encoding enhanced service data in the built RS frame at a coding rate of at least one of 1/2 and 1/4;

forming a data group including the first encoded enhanced service data, a plurality of known data sequences, and place holder bytes for main service data and first non-systematic RS parity data;

removing the place holder bytes for the main service data and the first non-systematic RS parity data which are included in the data group and outputting enhanced service data packets including data in the data group;

multiplexing the outputted enhanced service data packets and main service data packets;

second encoding the multiplexed enhanced and main service data packets to obtain systematic RS parity data for the main service data packets and the first non-systematic RS parity data for the enhanced service data packets;

interleaving data in the second encoded main and enhanced service data packets;

third encoding the interleaved data, wherein the third encoding comprises initializing at least one memory included in a third encoding module by initialization data at a start of at least one of the plurality of known data sequences; and

fourth encoding the interleaved data and the initialization data to obtain second non-systematic RS parity data and replacing the first non-systematic RS parity data with the second non-systematic RS parity data.

40. The method of claim 39, wherein the enhance service data includes traffic information data.

41. The method of claim 39, wherein the obtained systematic RS parity data are added at end of each of the main service data packets.

42. The method of claim 39, wherein the obtained first or second non-systematic RS parity data are inserted in a pre-determined location of the enhanced service data packets, the pre-determined location is a location where the place holder bytes for the first non-systematic RS parity data was located.

43. An apparatus of processing a digital broadcast signal for transmitting the digital broadcast signal, the apparatus comprising:

an RS frame encoder configured to Forward Error Correction (FEC) and CRC Cyclic Redundancy Check encode enhanced service data to build at least one Reed-Solomon (RS) frame of the enhanced service data;

a first encoding module configured to first encode enhanced service data in the built RS frame at a coding rate of at least one of 1/2 and 1/4;

a group formatter configured to a form data group including the encoded enhanced service data, a plurality of known data sequences and place holder bytes for main service data and first non-systematic RS parity data;

a packet formatter configured to remove the place holder bytes for the main service data and the first non-systematic RS parity data which are included in the data group and outputting enhanced service data packets including data in the data group;

a multiplexer configured to multiplex the outputted enhanced service data packets and main service data packets;

a second encoding module configured to second encode the multiplexed enhanced and main service data packets to obtain systematic RS parity data for the main service data packets and the first non-systematic RS parity data for the enhanced service data packets;

an interleaver configured to Interleave data in the second encoded main and enhanced service data packets;

a third encoding module configured to third encode the interleaved data, wherein the third encoding module is further configured to perform initializing at least one memory included in a third encoding module by initialization data at a start of at least one of the plurality of known data sequences; and

a fourth encoding module configured to fourth encode the interleaved data and the initialization data to obtain second non-systematic RS parity data and replace the first non-systematic RS parity data with the second non-systematic RS parity data.

44. The apparatus of claim 43,

wherein the enhance service data includes traffic information data.

45. The apparatus of claim 43,

wherein the obtained systematic RS parity data are added at end of each of the main service data packets.

46. The apparatus of claim 43,

wherein the obtained first or second non-systematic RS parity data are inserted in a pre-determined location of the enhanced service data packets, the pre-determined location is a location where the place holder bytes for the first non-systematic RS parity data was located.