Digital broadcasting system and data processing method

• US 7,782,808 B2
• Filed: 07/02/2008
• Issued: 08/24/2010
• Est. Priority Date: 07/02/2007
• Status: Active Grant

• 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): Chevalier; Robert
• Application Number:
  US12/167,241
• Publication Number:
  US 20090041129A1
• Time in Patent Office: 783 Days
• Field of Search: 370/312, 370/313, 386/46, 386/124, 386/83
• US Class Current: 370/312
• CPC Class Codes: H04H 20/55 for traffic information
• CPC Class Codes: H04H 20/71 Wireless systems
• CPC Class Codes: H04H 20/95 characterised by a specific format, e.g. an encoded audio stream
• CPC Class Codes: H04N 19/65 using error resilience
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/2383 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 21/435 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 21/4425 Monitoring of client processing errors or hardware failure
• CPC Class Codes: H04N 21/64322 IP

Abstract

A digital broadcasting system and a method of processing data are disclosed, which are robust to error when mobile service data are transmitted. To this end, additional encoding is performed for the mobile service data, whereby it is possible to strongly cope with fast channel change while giving robustness to the mobile service data.

Claims

1. A method of processing data for a receiver, the method comprising:

receiving a mobile broadcast signal comprising fast information channel (FIC) data containing cross layer information for mobile service acquisition, transmission parameter channel (TPC) data containing FIC version information for identifying an update of the FIC, and a plurality of video streams comprising a base layer and at least one enhancement layer, each layer having a unique identifier;

demodulating video streams of each layer of the mobile broadcast signal; and

decoding the video streams of the base layer and the video streams of the at least one enhancement layer referring to the unique identifier of each layer.

2. The method of claim 1, wherein a unique identifier value of the base layer is set to 0.

3. The method of claim 1, wherein a unique identifier value of the at least one enhancement layer starts from 1.

4. The method of claim 1, further comprising detecting a plurality of known data sequences from the mobile broadcast signal.

5. The method of claim 4, wherein the FIC data and TPC data are located between the plurality of known data sequences.

6. The method of claim 4, further comprising channel-equalizing the demodulated video streams using the detected plurality of known data sequences.

7. The method of claim 1, wherein receiving a mobile broadcast signal comprises receiving slots including the mobile broadcast signal using a time-slicing method.

15. The method of claim 1, wherein the plurality of video streams are scalable video streams.

16. The method of claim 15, wherein the unique identifier of each layer is included in table information.

17. The method of claim 16, wherein the table information comprises type information indicating whether the video stream is a scalable video stream.

18. The method of claim 17, wherein the table information further comprises profile information indicating a profile of the video stream when the type information indicates that the video stream is the scalable video stream.

19. The method of claim 17, wherein the table information further comprises level information indicating a level of the video stream when the type information indicates that the video stream is the scalable video stream.

20. The method of claim 4, wherein at least two of the plurality of known data sequences have different lengths.

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

22. The method of claim 6, further comprising turbo-decoding the channel-equalized video streams by a block unit according to block coding information included in the TPC data.

23. The method of claim 1, wherein the FIC data and the TPC data are encoded with a first encoding code and the video streams are encoded with a second encoding code.

24. The method of claim 23, wherein the first encoding code is a Parallel Concatenated Convolutional Code (PCCC) and the second encoding code is a Serial Concatenated Convolutional Code (SCCC).

8. A receiver comprising:

a receiving unit configured to receive a mobile broadcast signal comprising fast information channel (FIC) data containing cross layer information for mobile service acquisition, transmission parameter channel (TPC) data containing FIC version information for identifying an update of the FIC, and a plurality of video streams comprising a base layer and at least one enhancement layer, each layer having a unique identifier;

a demodulator configured to demodulate video streams of each layer of the mobile broadcast signal; and

a decoder configured to decode the video streams of the base layer and the video streams of the at least one enhancement layer referring to the unique identifier of each layer.

9. The receiver of claim 8, wherein a unique identifier value of the base layer is set to 0.

10. The receiver of claim 8, wherein a unique identifier value of the at least one enhancement layer starts from 1.

11. The receiver of claim 8, further comprising a known data detector configured to detect a plurality of known data sequences from the mobile broadcast signal.

12. The receiver of claim 11, wherein the FIC data and TPC data are located between the plurality of known data sequences.

13. The receiver of claim 11, further comprising a channel equalizer configured to channel-equalize the demodulated video streams using the detected plurality of known data sequences.

14. The receiver of claim 8, wherein the receiving unit receives slots including the mobile broadcast signal using a time-slicing method.

25. The receiver of claim 8, wherein the plurality of video streams are scalable video streams.

26. The receiver of claim 25, wherein the unique identifier of each layer is included in table information.

27. The receiver of claim 26, wherein the table information comprises type information indicating whether the video stream is a scalable video stream.

28. The receiver of claim 27, wherein the table information further comprises profile information indicating a profile of the video stream when the type information indicates that the video stream is the scalable video stream.

29. The receiver of claim 27, wherein the table information further comprises level information indicating a level of the video stream when the type information indicates that the video stream is the scalable video stream.

30. The receiver of claim 11, wherein at least two of the plurality of known data sequences have different lengths.

31. The receiver of claim 11, wherein at least one of the plurality of known data sequences is repeated with a same patter in the mobile broadcast signal.

32. The receiver of claim 13, further comprising a block decoder configured to turbo-decode the channel-equalized video streams by a block unit according to block coding information included in the TPC data.

33. The receiver of claim 8, wherein the FIC data and the TPC data are encoded with a first encoding code and the video streams are encoded with a second encoding code.

34. The receiver of claim 33, wherein the first encoding code is a Parallel Concatenated Convolutional Code (PCCC) and the second encoding code is a Serial Concatenated Convolutional Code (SCCC).