Digital broadcasting system and data processing method

• US 8,132,213 B2
• Filed: 09/02/2009
• Issued: 03/06/2012
• Est. Priority Date: 07/29/2007
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Song, Jae Hyung, Choi, In Hwan, Suh, Jong Yeul, Kim, Jin Pil, Lee, Chul Soo
• Primary Examiner(s): Pendleton, Brian
• Assistant Examiner(s): Lin, Jason
• Application Number:
  US12/553,001
• Publication Number:
  US 20100064323A1
• Time in Patent Office: 916 Days
• Field of Search: None
• US Class Current: 725/62
• CPC Class Codes: H04H 60/73 using meta-information

Abstract

The present invention relates to a digital broadcasting system and a processing data method thereof. The present invention includes acquiring a first ensemble providing service guide information for mobile service data from a broadcast signal in which the mobile service data and main service data are multiplexed, acquiring, from the first ensemble, first program table information including information which indicates that the first ensemble provides service guide information for a second ensemble, and decoding the first program table information and acquiring service guide information for mobile service data included in the second ensemble by using the decoded first program table information.

Claims

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

receiving a broadcast signal comprising a frame including a plurality of sub-frames, each of the plurality of sub-frames including data groups, wherein the data groups include;

fast information channel (FIC) data including cross layer information for mobile service acquisition,

transport parameter channel (TPC) data including FIC version information for identifying an update of the FIC data, and

mobile service data,

wherein the mobile service data is RS-CRC (Reed-Solomon-cyclic redundancy check) encoded through a Reed-Solomon (RS) frame, the TPC data is RS-encoded at a first code rate, and the FIC data is block-interleaved after being RS-encoded at a second code rate, and wherein the TPC data is not included in the FIC data;

decoding the RS frame received via the broadcast signal, wherein the RS frame is built using the mobile service data in the broadcast signal, a CRC syndrome checking process and an RS decoding process are performed on the built RS frame;

acquiring an ensemble identified by an ensemble identifier from the decoded RS frame and acquiring a service map table (SMT) from the ensemble, the SMT including access information of each mobile service included in the ensemble and service type information identifying a category of each mobile service; and

acquiring service guide data based on the service type information included in the SMT,

wherein the ensemble is carried through a parade, the parade being a collection of the data groups and the TPC data further includes information for a parade repetition cycle which represents a number of frames which do not contain a current parade and which are between frames that contain the current parade, and

wherein the TPC data is included in each of the data groups belonging to the parade and same information for the parade repetition cycle is received repeatedly through the data groups of the parade.

2. The method of claim 1, wherein the SMT further includes the ensemble identifier.

3. The method of claim 1, wherein the SMT further includes information indicating whether each mobile service included in the ensemble is active.

4. The method of claim 1, wherein the access information for each mobile service comprises IP address information of each mobile service.

5. The method of claim 4, wherein the IP address information of each mobile service comprises:

an IP address; and

address indication information indicating whether a version of the IP address is IPv4 or IPv6.

6. The method of claim 5, further comprising acquiring IP datagram corresponding to the IP address from the ensemble and decoding at least one of audio and video streams included in the acquired IP datagram.

7. The method of claim 1, wherein the access information of each mobile service comprises an IP address and a UDP port number of each component of a mobile service.

8. The method of claim 7, further comprising acquiring IP datagram corresponding to the IP address and the UDP port number from the ensemble and decoding at least one of audio and video streams included in the acquired IP datagram.

9. The method of claim 1, wherein the access information of each mobile service is channel information of the service guide data when the service type information indicates service guide data.

10. The method of claim 1, further comprising:

detecting a plurality of known data sequences from the broadcast signal; and

channel-equalizing the decoded RS frame using the detected known data sequences.

11. The method of claim 10, wherein at least two of the plurality of known data sequences have different lengths.

12. The method of claim 10, wherein at least one of the plurality of known data sequences is repeated with a same pattern in the broadcast signal.

13. The method of claim 10, further comprising turbo-decoding each data block in the channel-equalized RS frame according to block coding information included in the TPC data.

14. The method of claim 1, wherein the FIC data and the TPC data are encoded with a first encoding code and data included in the RS frame are encoded with a second encoding code.

15. The method of claim 14, wherein the first encoding code is a Parallel Concatenated Convolutional Code (PCCC) and the second encoding code is a Serial Concatenated Convolutional Code (SCCC).

16. The method of claim 1, wherein receiving a broadcast signal comprises receiving slots corresponding to the ensemble using a time-slicing method.

17. A receiver comprising:

a signal receiving unit for receiving a broadcast signal comprising a frame including a plurality of sub-frames, each of the plurality of sub-frames including data groups, wherein the data groups include;

fast information channel (FIC) data including cross layer information for mobile service acquisition,

transport parameter channel (TPC) data including FIC version information for identifying an update of the FIC data, and

mobile service data,

wherein the mobile service data is RS-CRC (Reed-Solomon-cyclic redundancy check) encoded through a Reed-Solomon (RS) frame, the TPC data is RS-encoded at a first code rate and the FIC data is block-interleaved after being RS-encoded at a second code rate, and wherein the TPC data is not included in the FIC data;

a decoder for decoding the RS frame received via the broadcast signal, wherein the RS frame is built using the mobile service data in the broadcast signal, a CRC syndrome checking process and an RS decoding process are performed on the built RS frame, and an RS decoding process is performed on data in the RS frame;

a separating unit for acquiring an ensemble identified by an ensemble identifier from the decoded RS frame and acquiring a service map table (SMT) from the ensemble, the SMT including access information of each mobile service included in the ensemble and service type information identifying a category of each mobile service; and

a decoding unit for acquiring service guide data based on the service type information included in the SMT,

wherein the ensemble is carried through a parade, the parade being a collection of the data groups and the TPC data further includes information for a parade repetition cycle which represents a number of frames which do not contain a current parade and which are between frames that contain the current parade, and

wherein the TPC data is included in each of the data groups belonging to the parade and same information for the parade repetition cycle is received repeatedly through the data groups of the parade.

18. The receiver of claim 17, wherein the SMT further includes the ensemble identifier.

19. The receiver of claim 17, wherein the SMT further includes information indicating whether each mobile service included in the ensemble is active.

20. The receiver of claim 17, wherein the access information for each mobile service comprises IP address information of each mobile service.

21. The receiver of claim 20, wherein the IP address information of each mobile service comprises:

an IP address; and

address indication information indicating whether a version of the IP address is IPv4 or IPv6.

22. The receiver of claim 21, wherein the decoding unit acquires IP datagram corresponding to the IP address from the ensemble and decodes at least one of audio and video streams included in the acquired IP datagram.

23. The receiver of claim 17, wherein the access information of each mobile service comprises an IP address and a UDP port number of each component of a mobile service.

24. The receiver of claim 23, the decoding unit acquires IP data gram corresponding to the IP address and the UDP port number from the ensemble and decodes at least one of audio and video streams included in the acquired IP datagram.

25. The receiver of claim 17, wherein the access information of each mobile service is channel information of the service guide data when the service type information indicates service guide data.

26. The receiver of claim 17, further comprising:

a known data detector for detecting a plurality of known data sequences from the broadcast signal; and

a channel equalizer for channel-equalizing the decoded RS frame using the detected known data sequences.

27. The receiver of claim 26, wherein at least two of the plurality of known data sequences have different lengths.

28. The receiver of claim 26, wherein at least one of the plurality of known data sequences is repeated with a same pattern in the broadcast signal.

29. The receiver of claim 26, further comprising a block decoder for turbo-decoding each data block in the channel-equalized RS frame according to block coding information included in the TPC data.

30. The receiver of claim 17, wherein the FIC data and the TPC data are encoded with a first encoding code and data included in the RS frame are encoded with a second encoding code.

31. The receiver of claim 30, wherein the first encoding code is a Parallel Concatenated Convolutional Code (PCCC) and the second encoding code is a Serial Concatenated Convolutional Code (SCCC).

32. The receiver of claim 17, wherein the signal receiving unit receives slots corresponding to the ensemble using a time-slicing method.