Method of processing traffic information and digital broadcast system

• US 8,351,428 B2
• Filed: 01/05/2010
• Issued: 01/08/2013
• 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, 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): Nawaz, Asad
• Assistant Examiner(s): Chang, Kai J.
• Application Number:
  US12/654,821
• Publication Number:
  US 20100172377A1
• Time in Patent Office: 1,099 Days
• Field of Search: 370389-394, 370413-418, 370537-545, 714/792
• US Class Current: 370/389
• CPC Class Codes: G08G 1/092 Coding or decoding of the information
• CPC Class Codes: G08G 1/094 Hardware aspects; Signal processing or signal properties, e.g. frequency bands
• CPC Class Codes: H04H 20/55 for traffic information
• CPC Class Codes: H04H 60/11 Arrangements for counter-measures when a portion of broadcast information is unavailable

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 for pre-processing enhanced data, wherein the enhanced data and known data are included in a data group, wherein at least three of plurality of sequences of the known data are spaced regularly in the data group, wherein at least one row of the data group is comprised of only the known data immediately after a row of the data group comprising of the known data and the enhanced data, and wherein the pre-processor further comprising;

a randomizer for randomizing the enhanced data;

a first encoder for generating data frames including the randomized data;

a second encoder for encoding the enhanced data included in the data encoded by the first encoder with a coding rate of G/H which is less than 1;

a group formatter for forming the data group having a plurality of regions with the data encoded by the second encoder and the known data;

a data de-interleaver for de-interleaving the data included in the data group; and

a packet formatter for adding header data to the de-interleaved data to generate data packets;

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

a trellis encoder for having at least one memory and trellis-encoding the multiplexed data, the at least one memory being initialized when data corresponds to a start of the sequences of the known data; and

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

2. The digital broadcast transmitter of claim 1, wherein the known data included in the data group are known to the digital broadcast transmitter and a digital broadcast receiver in advance.

3. The digital broadcast transmitter of claim 1, wherein the group formatter further inserts at least one of header location holders, main AV data holders, initialization data location holders and parity data holders into the data group.

4. A digital broadcast receiver, the receiver comprising:

a tuner for receiving digital broadcast signal including enhanced data and known data, wherein the enhanced data and the known data are included in a data group, wherein at least three of plurality of sequences of the known data are spaced regularly in the data group, wherein at least one row of the data group is comprised of only the known data immediately after a row of the data group comprising of the known data and the enhanced data, and wherein the enhanced data and known data result from;

randomizing the enhanced data;

generating data frames including the randomized data;

encoding the enhanced data included in the data encoded by the first encoder with a coding rate of G/H which is less than 1;

forming the data group having a plurality of regions with the data encoded by the second encoder and the known data;

de-interleaving the data included in the data group; and

adding header data to the de-interleaved data to generate data packets;

an equalizer for equalizing a channel distortion using at least one sequence of the known data; and

a decoder for decoding the received enhanced data.

5. The digital broadcast receiver of claim 4, wherein the known data included in the data group are known to the digital broadcast receiver and a digital broadcast transmitter in advance.

6. The digital broadcast receiver of claim 4, wherein the data group comprises a first region and a second region, the first region having main data and the enhanced data able to be coded at a first code rate, and the second region having the enhanced data able to be coded at a second code rate lower than the first code rate.

7. A method for processing a digital broadcast signal in a transmitter, the method comprising:

generating a data group comprising first segments and second segments, wherein the first segments have an enhanced data and a main data, and the second segments only have an enhanced data, the enhanced data being different from the enhanced data in the first segments, wherein at least one row of the data group is comprised of only the known data immediately after a row of the data group comprising of the known data and the enhanced data; and

transmitting the digital broadcast signal having information corresponding to the data group.

8. A method for processing a digital broadcast signal in a receiver, the method comprising:

receiving the digital broadcast signal having information corresponding to a data group, wherein the data group comprises first segments and second segments, the first segments having an enhanced data and a main data, and the second segments only having an enhanced data, the enhanced data being different from the enhanced data in the first segments, wherein at least one row of the data group is comprised of only the known data immediately after a row of the data group comprising of the known data and the enhanced data; and

decoding the received digital broadcast signal having the information corresponding to the data group.

9. An apparatus for processing a digital broadcast signal in a transmitter, the apparatus comprising:

a generating unit for generating a data group comprising first segments and second segments, wherein the first segments have an enhanced data and a main data and the second segments have only an enhanced data, the enhanced data being different from the enhanced data in the first segments, wherein at least one row of the data group is comprised of only the known data immediately after a row of the data group comprising of the known data and the enhanced data; and

a transmitting unit for transmitting the digital broadcast signal having information corresponding to the data group.

10. An apparatus for processing a digital broadcast signal in a receiver, the apparatus comprising:

a receiving unit for receiving the digital broadcast signal having information corresponding to a data group, wherein the data group comprises first segments and second segments, the first segments having an enhanced data and a main data, and the second segments having only an enhanced data, the enhanced data different from the enhanced data in the first segments, wherein at least one row of the data group is comprised of only the known data immediately after a row of the data group comprising of the known data and the enhanced data; and

a decoding unit for decoding the received digital broadcast signal having the information corresponding to the data group.