Digital broadcast system, and data processing method

• US 8,068,509 B2
• Filed: 06/25/2008
• Issued: 11/29/2011
• Est. Priority Date: 06/25/2007
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Byoung Gill, Suh, Jong Yeul, Lee, Hyoung Gon, Hong, Ho Taek, Choi, In Hwan, Lee, Chul Soo, Kim, Jin Pil, Song, Jae Hyung, Song, Won Gyu, Kwak, Kook Yeon, Kim, Jin Woo, Lee, Joon Hui
• Primary Examiner(s): Pezzlo; John
• Application Number:
  US12/146,272
• Publication Number:
  US 20090031361A1
• Time in Patent Office: 1,252 Days
• Field of Search: 370/252, 370/328, 370/329, 370/390, 370/419
• US Class Current: 370/419
• CPC Class Codes: H04L 1/0047 Decoding adapted to other signal detection operation in conjunction with sequence estimation or equalization H04L25/03286
• CPC Class Codes: H04L 1/006 Trellis-coded modulation
• 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 2001/0093 Point-to-multipoint
• 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 21/2381 Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network transmission of MPEG streams over ATM H04L12/5601
• 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 21/41407 embedded in a portable device, e.g. video client on a mobile phone, PDA, laptop constructional details of equipment or arrangements specially adapted for portable computer application G06F1/1626; arrangements specially adapted for mobile receivers in broadcast systems H04H20/57
• CPC Class Codes: H04N 21/4345 Extraction or processing of SI, e.g. extracting service information from an MPEG stream
• CPC Class Codes: H04N 21/4381 Recovering the multiplex stream from a specific network, e.g. recovering MPEG packets from ATM cells transmission of MPEG streams over ATM H04L12/5601
• 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 21/6131 involving transmission via a mobile phone network wireless downlink channel access H04W74/006
• CPC Class Codes: H04N 21/64322 IP
• CPC Class Codes: H04N 21/6433 Digital Storage Media - Command and Control Protocol [DSM-CC]
• CPC Class Codes: H04W 72/30 Resource management for broadcast services

Abstract

A digital broadcast system having storing resistance to errors generated during the transmission of mobile service data, and a data processing method are disclosed. The digital broadcast system additionally encodes mobile service data. As a result, the mobile service data has strong resistance to a channel variation and noise, and at the same time the system can quickly cope with the channel variation.

Claims

1. A method of processing a broadcast signal in a receiving system, the method comprising:

receiving the broadcast signal comprising a data group, the data group comprising fast information channel (FIC) data carrying cross-layer information to enable a fast mobile service acquisition, transmission parameter channel (TPC) data including FIC version information for indicating an update of the FIC data, mobile service data, and a plurality of known data sequences;

demodulating the received broadcast signal;

compensating channel distortion generated in the demodulated broadcast signal based upon at least one of the plurality of known data sequences;

obtaining a first information table including access information of an IP stream of the mobile service data;

acquiring the IP stream of the mobile service data based upon the obtained first information table; and

decoding audio or video data delivered through the acquired IP stream of the mobile service data,

wherein the TPC and FIC data are encoded with a Parallel Concatenated Convolutional Code (PCCC) encoding method and the mobile service data is encoded with a Serial Concatenated Convolutional Code (SCCC) encoding method.

2. The method of claim 1, wherein at least two of the plurality of known data sequences have different lengths.

3. The method of claim 1, wherein the plurality of known data sequences are known by a transmitting side and a receiving side in advance.

4. The method of claim 1, wherein at least one of the plurality of known data sequences is repeated within a same pattern in the broadcast signal.

5. The method of claim 1, wherein the TPC data and the FIC data are inserted between a first known data sequence and a second known data sequence of the plurality of known data sequences.

6. The method of claim 1, wherein initialization data are positioned at a beginning portion of each known data sequence of the plurality of known data sequences, and wherein the initialization data being used to initialize memories within a trellis encoder of a transmitting system are trellis-encoded.

7. The method of claim 1, wherein obtaining the first information table comprises obtaining the first information table from the channel distortion compensated broadcast signal.

8. The method of claim 1, wherein the data group is received in at least one slot, wherein one sub-frame comprises a plurality of slots, and wherein one transmission frame comprises a plurality of sub-frames.

9. A receiving system comprising:

a tuner for receiving a broadcast signal comprising a data group, the data group comprising fast information channel (FIC) data carrying cross-layer information to enable a fast mobile service acquisition, transmission parameter channel (TPC) data including FIC version information for indicating an update of the FIC data, mobile service data, and a plurality of known data sequences;

a demodulator for demodulating the received broadcast signal;

an equalizer for compensating channel distortion generated in the demodulated broadcast signal based upon the plurality of known data sequences;

a processor for obtaining a first information table including access information of an IP stream of the mobile service data, and acquiring the IP stream of the mobile service data based upon the obtained first information table; and

a decoder for decoding audio or video data delivered through the acquired IP stream of the mobile service data,

wherein the TPC and FIC data are encoded with a Parallel Concatenated Convolutional Code (PCCC) encoding method and the mobile service data is encoded with a Serial Concatenated Convolutional Code (SCCC) encoding method.

10. The receiving system of claim 9, wherein at least two of the plurality of known data sequences have different lengths.

11. The receiving system of claim 9, wherein the plurality of known data sequences are known by a transmitting side and a receiving side in advance.

12. The receiving system of claim 9, wherein at least one of the plurality of known data sequences is repeated within a same pattern in the broadcast signal.

13. The receiving system of claim 9, wherein the TPC data and the FIC data are inserted between a first known data sequence and a second known data sequence of the plurality of known data sequences.

14. The receiving system of claim 9, wherein initialization data are positioned at a beginning portion of each known data sequence of the plurality of known data sequences, and wherein the initialization data being used to initialize memories within a trellis encoder of a transmitting system are trellis-encoded.

15. The receiving system of claim 9, wherein the processor obtains the first information table from the channel distortion compensated broadcast signal.

16. The receiving system of claim 9, wherein the data group is received in at least one slot, wherein one sub-frame comprises a plurality of slots, and wherein one transmission frame comprises a plurality of sub-frames.