Method of processing traffic information and digital broadcast system

• US 8,098,694 B2
• Filed: 05/24/2010
• Issued: 01/17/2012
• 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, Young In, Hong, Ho Taek, Choi, In Hwan, Kwak, Kook Yeon, Lee, Hyoung Gon, Kim, Byoung Gill, Kim, Jin Woo, Kim, Jong Moon, Song, Won Gyu
• Primary Examiner(s): Vu, Huy D
• Assistant Examiner(s): Renner, Brandon
• Application Number:
  US12/786,080
• Publication Number:
  US 20100229213A1
• Time in Patent Office: 603 Days
• Field of Search: 348/608, 375/240, 375/265, 375/270, 375/295, 375/355
• US Class Current: 370/532
• CPC Class Codes: G08G 1/092 Coding or decoding of the information
• CPC Class Codes: H04H 20/55 for traffic information
• CPC Class Codes: H04H 20/95 characterised by a specific format, e.g. an encoded audio stream
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0059 Convolutional codes
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/23608 Remultiplexing multiplex streams, e.g. involving modifying time stamps or remapping the packet identifiers
• 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

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 receiver, comprising:

a tuner configured to receive broadcasting data having enhanced data and main data, the broadcasting data being generated by a digital broadcast transmitter comprising;

reed solomon frame encoding the enhanced data by a reed solomon frame encoder, block processing the reed solomon frame encoded enhanced data by a block processor, formatting the block processed enhanced data into a data group by a group formatter, the data group having a plurality of regions, the data group including a first, a second, and a third region, the second region being positioned between the first and third regions, the first and third regions including the enhanced data, main data, and parity bytes, and the second region including the enhanced data, MPEG header bytes and RS parity bytes, packet formatting the group formatted enhanced data by a packet formatter, multiplexing the packet formatted enhanced data with main data by a multiplexer, and post processing the multiplexed data by a post processor, the group including known data;

a demodulator configured to perform demodulating on the enhanced data based on the known data; and

a decoder configured to perform decoding on the demodulated enhanced data,

wherein the demodulator comprises;

an equalizer configured to channel-equalize the enhanced data based on the known data;

a block decoder configured to perform soft decision decoding on the channel-equalized enhanced data; and

a reed solomon frame decoder configured to perform an inverse process of the reed solomon frame encoder included in the digital broadcast transmitter.

2. The digital broadcast receiver of claim 1, wherein the data group is divided into at least two areas, one area of them having the main data and the enhanced data able to be coded at a first code rate, and another area of them having the enhanced data able to be coded at a second code rate lower than the first code rate.

3. The digital broadcast receiver of claim 1, wherein the broadcasting data is generated from trellis-encoding the multiplexed data, at least one memory being initialized by initialization data when input data corresponds to a beginning of a known data sequence.

4. The digital broadcast receiver of claim 1, wherein the RS frame encoding generates data frames including the enhanced data and encodes each data frame for at least one of an error correction and an error detection.

5. The digital broadcast receiver of claim 1, wherein the block processing encodes the enhanced data encoded by the RS frame encoder with a coding rate of G/H, wherein G and H are positive integers and G is less than H.

6. A method of processing digital broadcast data in a digital broadcast receiver, comprising:

receiving broadcasting data having enhanced data and main data, the broadcasting data being generated from a process comprising;

reed solomon frame encoding the enhanced data, block processing the reed solomon frame encoded enhanced data, formatting the block processed enhanced data into a data group, the data group having a plurality of regions, the data group including a first, a second, and a third region, the second region being positioned between the first and third regions, the first and third regions including the enhanced data, main data, and parity bytes, and the second region including the enhanced data, MPEG header bytes, and RS parity bytes, packet formatting the group formatted enhanced data, multiplexing the packet formatted enhanced data with main data, and post processing the multiplexed data in a digital broadcast transmitter, the group including known data;

performing demodulating on the enhanced data based on the known data; and

performing decoding on the demodulated enhanced data,

wherein the step of demodulating comprises;

channel-equalizing the enhanced data based on the known data;

performing soft decision decoding on the channel-equalized enhanced data; and

performing an inverse process of a reed solomon frame encoder included in the digital broadcast transmitter.

7. The method of claim 6, wherein the data group is divided into at least two areas, one area of them having the main data and the enhanced data able to be coded at a first code rate, and another area of them having the enhanced data able to be coded at a second code rate lower than the first code rate.

8. The method of claim 6, wherein the broadcasting data is generated from trellis-encoding the multiplexed data, at least one memory being initialized by initialization data when input data corresponds to a beginning of a known data sequence.

9. The method of claim 6, wherein the RS frame encoding generates data frames including the enhanced data and encodes each data frame for at least one of an error correction and an error detection.

10. The method of claim 6, wherein the block processing encodes the enhanced data encoded by the RS frame encoder with a coding rate of G/H, wherein G and H are positive integers and G is less than H.