Method of processing traffic information and digital broadcast system

• US 7,978,697 B2
• Filed: 04/09/2010
• Issued: 07/12/2011
• Est. Priority Date: 10/05/2005
• 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, Hong, Ho Taek, Choi, In Hwan, Kim, Jin Pil, Kim, Jong Moon, Kim, Young In, Song, Won Gyu, Kwak, Kook Yeon, Kim, Jin Woo
• Primary Examiner(s): Patel; Jayanti K
• Assistant Examiner(s): ZHU, BO HUI ALVIN
• Application Number:
  US12/757,589
• Publication Number:
  US 20100194999A1
• Time in Patent Office: 459 Days
• Field of Search: 370/389, 370/480, 370/535, 370/536, 370/537
• US Class Current: 370/389
• CPC Class Codes: H04H 20/30 by a single channel
• CPC Class Codes: H04H 20/55 for traffic information
• CPC Class Codes: H04H 20/72 of terrestrial networks
• CPC Class Codes: H04H 40/27 specially adapted for broadcast systems covered by groups H04H20/53 - H04H20/95
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/23614 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 21/2383 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 21/41422 located in transportation means, e.g. personal vehicle arrangements specially adapted for transportation systems in broadcast systems H04H20/62
• CPC Class Codes: H04N 21/4345 Extraction or processing of SI, e.g. extracting service information from an MPEG stream
• CPC Class Codes: H04N 21/4348 Demultiplexing of additional data and video streams
• 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 21/4382 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 21/64315 DVB-H
• CPC Class Codes: H04N 21/8126 involving additional data, e.g. news, sports, stocks, weather forecasts

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. A digital broadcast transmitter, comprising:

a pre-processor configured to pre-process enhanced data, the pre-processor further comprising;

a block processor configured to selectively perform 1/2 rate coding on enhanced data or 1/4 rate coding on enhanced data,

a group formatter configured to insert the coded enhanced data, from the block processor, known data and place holders for main service data into a data group having a plurality of regions, wherein a first region among the plurality of regions has a segment comprised of only the known data and a second region among the plurality of regions has no known data, and

a packet formatter configured to remove the place holders for main service data in the data group;

a first multiplexer configured to multiplex packets having the enhanced data with packets having the main service data;

a trellis encoder configured to trellis-encode the multiplexed data, wherein memories of the trellis encoder are initialized at the start of each sequence of the known data; and

a second multiplexer configured to multiplex the trellis-encoded data with field synchronization data and segment synchronization data.

2. The digital broadcast transmitter of claim 1, wherein initialization of the memories in the trellis encoder prior to the each sequence of the known data is performed.

3. The digital broadcast transmitter of claim 2, wherein the segment is comprised of 207 bytes.

4. The digital broadcast transmitter of claim 3, wherein the plurality of regions correspond to at least three of regions.

5. A method of processing a digital broadcast signal in a digital broadcast transmitter, comprising:

pre-processing enhanced data in a pre-processor, wherein the step of pre-processing comprises;

performing selectively 1/2 rate coding on enhanced data or 1/4 rate coding on enhanced data in a block processor,

inserting the coded enhanced data from the block processor, known data and place holders for main service data into a data group having a plurality of regions in a group formatter, wherein a first region among the plurality of regions has a segment comprised of only the known data and a second region among the plurality of regions has no known data, and

removing the place holders for main service data in the data group in a packet formatter;

firstly multiplexing packets having the enhanced data with packets having the main service data in a first multiplexer;

trellis-encoding the multiplexed data in a trellis encoder, wherein memories of the trellis encoder are initialized at the start of each sequence of the known data; and

secondly multiplexing the trellis-encoded data with field synchronization data and segment synchronization data in a second multiplexer.

6. The method of claim 5, wherein initialization of the memories in the trellis encoder prior to the each sequence of the known data is performed.

7. The method of claim 6, wherein the segment is comprised of 207 bytes.

8. The method of claim 7, wherein the plurality of regions correspond to at least three of regions.