METHOD OF PROCESSING TRAFFIC INFORMATION AND DIGITAL BROADCAST SYSTEM

• US 20110194622A1
• Filed: 02/24/2011
• Published: 08/11/2011
• 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, Byoung Gill, Lee, Hyoung Gon, Hong, Ho Taek, Choi, In Hwan, Kim, Jin Pil, Kim, Jong Moon, Kim, Young In, Song, Won Gyu, Kwak, Kook Yeon, Kim, Jin Woo
• Granted Patent: US 9,136,960 B2
• Time in Patent Office: Days
• US Class Current: 375/240.27
• CPC Class Codes: H04B 1/0475 with means for limiting noise, interference or distortion H04B1/0483 takes precedence
• CPC Class Codes: H04B 1/10 Means associated with receiver for limiting or suppressing noise or interference
• CPC Class Codes: H04H 20/44 Arrangements characterised by circuits or components specially adapted for broadcast
• CPC Class Codes: H04H 20/55 for traffic information
• 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 1/0083 Formatting with frames or packets; Protocol or part of protocol for error control
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint

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

1-36. -36. (canceled)

37. A digital broadcast transmitter, comprising:

a pre-processor configured to pre-process enhanced data, wherein the pre-processor encodes the enhanced data for at least one of error correction and error detection and generates enhanced data packets including the encoded enhanced data;

a multiplexer configured to multiplex the enhanced data packets with one or more main audio and video (AV) data packets;

a first data randomizer configured to perform a first randomizing process only for data included in the main AV data packets among data in the multiplexed enhanced and main AV data packets;

a data encoding unit configured to add first parity data for the enhanced data and second parity data for the data included in the main AV data packets;

an interleaving unit configured to interleave data in the enhanced and main AV data packets having the first and second parity data;

a trellis encoder configured to have at least one memory and trellis-encode the interleaved data, the at least one memory being initialized at a beginning of a known data sequence; and

a data transmission unit inserting synchronization data into the trellis-encoded data, modulating the trellis-encoded data having the synchronization data, and transmitting the modulated data.

38. The digital broadcast transmitter of claim 37, further comprising a processor calculating third parity data from the interleaved data and initialization data, and replacing the first parity data within the interleaved data with the third parity data.

39. The digital broadcast transmitter of claim 37, wherein the pre-processor comprises:

a second randomizer configured to perform a second randomizing process for the enhanced data;

a encoder configured to generate data frames including the enhanced data and encode data in each of the data frames for at least one of error correction and error detection;

a group formatter configured to insert the enhanced data in the generated data frames into a data group having a plurality of regions;

a data deinterleaver configured to deinterleave the data included in the data group; and

a packet formatter configured to add header data to the deinterleaved data to generate data packets.

40. A method of processing enhanced data in a digital broadcast transmitter, the method comprising:

pre-processing enhanced data, wherein the pre-processing comprises encoding the enhanced data for at least one of error correction and error detection and generating enhanced data packets including the encoded enhanced data;

multiplexing the enhanced data packets with one or more main audio and video (AV) data packets in a multiplexer;

performing a first randomizing process only for data included in the main AV data packets among data in the multiplexed enhanced and main AV data packets;

adding first parity data for the enhanced data and second parity data for the data included in the main AV data packets;

interleaving data in the enhanced and main AV data packets having the first and second parity data in an interleaver;

trellis-encoding the interleaved data in a trellis-encoder having at least one memory; and

initializing the at least one memory at a beginning of a known data sequence.

41. The method of claim 40, further comprising:

calculating third parity data from the interleaved data and initialization data, and replacing the first parity data within the interleaved data with the third parity data.

42. The method of claim 40, wherein the pre-processing enhanced data further comprises:

performing a second randomizing process for the enhanced data;

generating data frames including the enhanced data and encoding each data frame for at least one of error correction and error detection;

inserting the enhanced data in the generated data frames into a data group having a plurality of regions;

deinterleaving the data included in the data group; and

adding header data to the deinterleaved data to generate data packets.

43. A digital broadcast transmitter, comprising:

a pre-processor pre-processing enhanced data by encoding the enhanced data and by generating a enhanced data packet including the encoded enhanced data;

a multiplexer multiplexing the enhanced data packet with one or more main audio and video (AV) data packets; and

a trellis encoder having at least one memory and trellis-encoding the multiplexed data packets, the at least one memory being initialized at a beginning of a known data sequence.

44. The digital broadcast transmitter of claim 43, further comprising:

an encoder adding first parity data to the multiplexed data;

a data interleaver interleaving the multiplexed data having the first parity data; and

a processor calculating second parity data from the interleaved data and initialization data, and replacing the first parity data within the interleaved data with the second parity data.

45. The digital broadcast transmitter of claim 43, wherein the pre-processor comprises:

a randomizer randomizing the enhanced data;

a first encoder generating data frames including the randomized data and encoding each data frame for at least one of error correction and error detection;

a second encoder encoding the enhanced data included in the data encoded by the first encoder with a coding rate of G/H, wherein G and H are positive integers and G is less than H;

a group formatter inserting the data encoded by the second encoder into a data group having a plurality of regions;

a data deinterleaver deinterleaving the data included in the data group; and

a packet formatter adding header data to the deinterleaved data to generate data packets.

46. The digital broadcast transmitter of claim 43, wherein the group formatter further inserts header location holders, main AV data holders, and parity data holders into the data group.

47. The digital broadcast transmitter of claim 43, wherein the group formatter further inserts initialization data into the data group.

48. A method of processing enhanced data in a digital broadcast transmitter, the method comprising:

pre-processing enhanced data by encoding the enhanced data and by generating a enhanced data packet including the encoded enhanced data;

multiplexing the enhanced data packet with one or more main audio and video (AV) data packets in a multiplexer;

trellis-encoding the multiplexed data packets in a trellis-encoder having at least one memory; and

initializing the at least one memory at a beginning of a known data sequence.

49. The method of claim 48, further comprising:

adding first parity data to the multiplexed data;

interleaving the multiplexed data having the first parity data; and

calculating second parity data from the interleaved data and initialization data, and replacing the first parity data within the interleaved data with the second parity data.

50. The method of claim 48, wherein the pre-processing enhanced data comprises:

randomizing the enhanced data;

generating data frames including the randomized data and encoding each data frame for at least one of error correction and error detection;

encoding the enhanced data included in the data encoded by the first encoder with a coding rate of G/H, wherein G and H are positive integers and G is less than H;

inserting the data encoded by the second encoder into a data group having a plurality of regions;

deinterleaving the data included in the data group; and

adding header data to the deinterleaved data to generate data packets.

51. The method of claim 48, further comprising:

inserting header location holders, main AV data holders, and parity data holders into the data group.

52. The digital broadcast transmitter of claim 48, further comprising:

inserting initialization data into the data group.