Digital broadcasting system and data processing method in the digital broadcasting system

• US 8,089,929 B2
• Filed: 09/22/2008
• Issued: 01/03/2012
• Est. Priority Date: 09/21/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Chul Soo, Choi, In Hwan, Song, Jae Hyung, Choi, Seung Jong
• Primary Examiner(s): Mui, Gary
• Application Number:
  US12/234,915
• Publication Number:
  US 20090080405A1
• Time in Patent Office: 1,198 Days
• Field of Search: 370/349, 370/329, 370/208, 370/312, 370/398, 370/486, 370/535, 370470-474, 455/3.02, 455/3.03, 455/3.06, 455/150.1, 455/414.3, 725/120, 725/123, 725/131, 725/139, 725/143, 375/240, 375/240.01, 375/270, 714/755, 714/756, 714/784, 714/792, 714/758
• US Class Current: 370/329
• CPC Class Codes: H03M 13/09 Error detection only, e.g. using cyclic redundancy check [CRC] codes or single parity bit
• CPC Class Codes: H03M 13/15 Cyclic codes, i.e. cyclic shifts of codewords produce other codewords, e.g. codes defined by a generator polynomial, Bose-Chaudhuri-Hocquenghem [BCH] codes H03M13/17 takes precedence
• CPC Class Codes: H03M 13/1515 Reed-Solomon codes
• CPC Class Codes: H03M 13/27 using interleaving techniques
• CPC Class Codes: H03M 13/2906 using block codes H03M13/2957 takes precedence
• CPC Class Codes: H03M 13/356 Unequal error protection [UEP]
• CPC Class Codes: H04H 20/30 by a single channel
• CPC Class Codes: H04H 20/57 for mobile receivers
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• CPC Class Codes: H04L 1/0058 Block-coded modulation
• CPC Class Codes: H04L 1/0075 Transmission of coding parameters to receiver H04L1/0023 takes precedence
• CPC Class Codes: H04L 69/16 Implementation or adaptation of Internet protocol [IP], of transmission control protocol [TCP] or of user datagram protocol [UDP]
• 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: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
• CPC Class Codes: H04W 72/044 based on the type of the allocated resource
• CPC Class Codes: H04W 8/26 Network addressing or numbering for mobility support

Abstract

A digital broadcasting system and a data processing method are disclosed. In an aspect of the present invention, the present invention provides a data processing method including receiving a broadcast signal in which main service data and mobile service data are multiplexed, demodulating the received broadcast signal, outputting demodulation time information of a specific position of a broadcast signal frame, and acquiring reference time information contained in the mobile service data frame, setting the reference time information to a system time clock at a specific time based on the demodulation time information and decoding the mobile service data according to the system time clock.

Claims

1. A method of transmitting a broadcast signal in a transmitter, the method comprising:

multiplexing mobile data and main data; and

transmitting a transmission frame including the multiplexed mobile data and main data,

wherein a parade of data groups is transmitted during slots within the transmission frame, the slots being basic time periods for multiplexing the mobile data and the main data,

wherein data groups of multiple parades are assigned to a single transmission frame and a plurality of consecutive data groups are assigned to be spaced apart from one another within the transmission frame,

wherein each of the data groups includes the mobile data, signaling information and known data sequences,

wherein the signaling information includes fast information channel (FIC) data having binding information between a service of the mobile data and an ensemble and transmission parameter channel (TPC) data indicating a version of the FIC data,

wherein the FIC data is divided into a plurality of FIC segments,

wherein each of the plurality of FIC segments includes an FIC segment header and is transmitted in each of the data groups,

wherein the ensemble includes the service and a signaling table describing the service, and

wherein the mobile data belonging to the ensemble is RS-CRC (Reed Solomon-cyclic redundancy check) encoded through a 2-dimensional Reed-Solomon (RS) frame, each row of a payload of the RS frame including a transport packet of the mobile data.

2. The method of claim 1, wherein the signaling table includes a service map table (SMT) which provides Internet protocol (IP) address information and IP component level information for the service.

3. The method of claim 2, wherein the SMT includes a flag indicating whether or not the IP address information is an Ipv4 address.

4. The method of claim 3, wherein:

the flag is set to 0 (zero) when the IP address information is an Ipv4 address; and

the flag is set to 1 when the IP address information is an Ipv6 address.

5. The method of claim 1, wherein the transport packet includes an Internet protocol (IP) datagram having a network time protocol (NTP) timebase stream.

6. A method of receiving a broadcast signal in a receiver, the method comprising:

receiving the broadcast signal including a transmission frame, wherein a parade of data groups in the broadcast signal is received during slots within the transmission frame, the slots being basic time periods for multiplexing mobile data and main data, wherein data groups of multiple parades are assigned to a single transmission frame and a plurality of consecutive data groups are assigned to be spaced apart from one another within the transmission frame, and wherein each of the data groups includes the mobile data, signaling information and known data sequences;

demodulating the received broadcast signal and obtaining, from the signaling information, fast information channel (FIC) data including binding information between a service of the mobile data and an ensemble and transmission parameter channel (TPC) data indicating a version of the FIC data, wherein the FIC data is divided into a plurality of FIC segments, wherein each of the plurality of FIC segments includes an FIC segment header and is received in each of the data groups, and wherein the ensemble includes the service and a signaling table describing the service;

building a Reed-Solomon (RS) frame corresponding to the ensemble by collecting a plurality of data portions which are mapped to the data groups; and

decoding the RS frame, wherein the RS frame is a 2-dimensional data frame through which the mobile data belonging to the ensemble is RS-CRC (Reed Solomon-cyclic redundancy check) encoded, each row of a payload of the RS frame including a transport packet of the mobile data.

7. The method of claim 6, wherein the signaling table includes a service map table (SMT) which provides Internet protocol (IP) address information and IP component level information for the service.

8. The method of claim 7, wherein the SMT includes a flag indicating whether or not the IP address information is an Ipv4 address.

9. The method of claim 8, wherein:

the flag is set to 0 (zero) when the IP address information is an Ipv4 address; and

the flag is set to 1 when the IP address information is an Ipv6 address.

10. The method of claim 6, wherein the transport packet includes an Internet protocol (IP) datagram having a network time protocol (NTP) timebase stream.

11. The method of claim 10, further comprising:

synchronizing presentation of audio and video of the mobile data based on an NTP timestamp in the NTP timebase stream.

12. An apparatus for transmitting a broadcast signal, the apparatus comprising:

a multiplexer configured to multiplex mobile data and main data; and

a transmission unit configured to transmit a transmission frame including the multiplexed mobile data and main data,

wherein a parade of data groups is transmitted during slots within the transmission frame, the slots being basic time periods for multiplexing the mobile data and the main data,

wherein data groups of multiple parades are assigned to a single transmission frame and a plurality of consecutive data groups are assigned to be spaced apart from one another within the transmission frame,

wherein each of the data groups includes the mobile data, signaling information and known data sequences,

wherein the signaling information includes fast information channel (FIC) data including binding information between a service of the mobile data and an ensemble and transmission parameter channel (TPC) data indicating a version of the FIC data,

wherein the FIC data is divided into a plurality of FIC segments,

wherein each of the plurality of FIC segments includes an FIC segment header and is received in each of the data groups,

wherein the ensemble includes the service and a signaling table describing the service, and

wherein the mobile data belonging to the ensemble is RS-CRC (Reed Solomon-cyclic redundancy check) encoded through a 2-dimensional Reed-Solomon (RS) frame, each row of a payload of the RS frame including a transport packet of the mobile data.

13. The apparatus of claim 12, wherein the signaling table includes a service map table (SMT) which provides Internet protocol (IP) address information and IP component level information for the service.

14. The apparatus of claim 13, wherein the SMT includes a flag indicating whether or not the IP address information is an IPv4 address.

15. The apparatus of claim 14, wherein:

the flag is set to 0 (zero) when the IP address information is an IPv4 address; and

the flag is set to 1 when the IP address information is an IPv6 address.

16. An apparatus for receiving a broadcast signal, the apparatus comprising:

a tuner configured to receive a broadcast signal including a transmission frame, wherein a parade of data groups is received during slots within the transmission frame, the slots being basic time periods for multiplexing mobile data and main data, wherein data groups of multiple parades are assigned to a single transmission frame and a plurality of consecutive data groups are assigned to be spaced apart from one another within the transmission frame, and wherein each of the data groups includes the mobile data, signaling information and known data sequences;

a demodulator configured to demodulate the received broadcast signal and obtain, from the signaling information, fast information channel (FIC) data including binding information between a service of the mobile data and an ensemble and transmission parameter channel (TPC) data indicating a version of the FIC data, wherein the FIC data is divided into a plurality of FIC segments, wherein each of the plurality of FIC segments includes an FIC segment header and is received in each of the data groups, and wherein the ensemble includes the service and a signaling table describing the service; and

an RS frame decoder configured to build a Reed-Solomon (RS) frame corresponding to the ensemble by collecting a plurality of data portions which are mapped to the data groups, and decode the RS frame, wherein the RS frame is a 2-dimensional data frame through which the mobile data belonging to the ensemble is RS-CRC (Reed Solomon-cyclic redundancy check) encoded, each row of a payload of the RS frame including a transport packet of the mobile data.

17. The apparatus of claim 16, wherein:

the transport packet includes an Internet protocol (IP) datagram having a network time protocol (NTP) timebase stream; and

the apparatus further comprises a controller configured to synchronize presentation of audio and video of the mobile data based on an NTP timestamp in the NTP timebase stream.

18. The apparatus of claim 17, wherein the signaling table includes a service map table (SMT) which provides IP address information and IP component level information for the service.

19. The apparatus of claim 18, wherein the SMT includes a flag indicating whether or not the IP address information is an IPv4 address.

20. The apparatus of claim 19, wherein:

the flag is set to 0 (zero) when the IP address information is an IPv4 address; and

the flag is set to 1 when the IP address information is an IPv6 address.