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

• US 8,385,250 B2
• Filed: 06/21/2010
• Issued: 02/26/2013
• Est. Priority Date: 09/21/2007
• Status: Expired due to Fees

• 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): Phan, Tri H
• Application Number:
  US12/820,031
• Publication Number:
  US 20100254318A1
• Time in Patent Office: 981 Days
• Field of Search: 370204-206, 370/229, 370/234, 370/249, 370/252, 370/312, 370/314, 370/321, 370/330, 370/332, 370335-338, 370346-347, 375/270, 375/277, 375295-301, 375316-322
• US Class Current: 370/312
• 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:

transmitting, at a transmitting unit, a transmission frame including a plurality of slots during which data groups of mobile data are transmitted, the mobile data being encoded through a Reed-Solomon (RS) frame, each of the data groups including a plurality of regions, each of the regions including a plurality of data blocks, each of the data blocks including contiguous Vestigial Sideband (VSB) data segments,

wherein a first region and a second region in the data group include at least three known data sequences which are spaced apart by regular VSB data segments, and the first region further includes signaling information of the mobile data in specified VSB data segments,

wherein the signaling information includes first channel information providing binding information between a mobile service identifier and an ensemble being a collection of services of the mobile data, and second channel information describing the transmission frame and the data groups,

wherein the second channel information provides an identification number of the ensemble,

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

wherein the first signaling table includes a service map table (SMT) providing Internet Protocol (IP) address information and IP component level information for the service, and

wherein the service is signaled by hierarchical signaling information which includes ensemble access information in the second channel information and IP level service access information in the SMT.

2. The method of claim 1, wherein the SMT includes a flag indicating whether or not the IP address information is an IPv4 address.

3. The method of claim 2, wherein, when the flag is set to 0 (zero), the IP address information is an IPv4 address, and, when the flag is set to 1, the IP address information is an IPv6 address.

4. The method of claim 1, wherein each row of a payload of the RS frame includes a transport packet of the mobile data, the transport packet including an IP datagram having a network time protocol (NTP) timestamp.

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

receiving, at a tuner, a transmission frame including a plurality of slots during which data groups of mobile data are received, the mobile data being data encoded through a Reed-Solomon (RS) frame, each of the data groups including a plurality of regions, each of the regions including a plurality of data blocks, each of the data blocks including contiguous Vestigial Sideband (VSB) data segments,

wherein a first region and a second region in the data group include known data sequences which are spaced regular VSB data segments apart, and the first region further includes a known data sequence and signaling information of the mobile data in specified VSB data segments,

wherein the signaling information includes first channel information providing binding information between a mobile service identifier and an ensemble being a collection of services of the mobile data, and second channel information describing the transmission frame and the data groups,

wherein the second channel information provides an identification number of the ensemble,

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

wherein the first signaling table includes a service map table (SMT) providing Internet Protocol (IP) address information and IP component level information for the service, and

wherein the service is signaled by hierarchical signaling information which includes ensemble access information in the second channel information and IP level service access information in the SMT;

building, at a frame builder, the RS frame using the data groups included in the transmission frame; and

decoding, at a decoder, the RS frame.

6. The method of claim 5, wherein the SMT includes a flag indicating whether or not the IP address information is an IPv4 address.

7. The method of claim 6, wherein, when the flag is set to 0 (zero), the IP address information is an IPv4 address, and, when the flag is set to 1, the IP address information is an IPv6 address.

8. The method of claim 5, wherein each row of a payload of the RS frame includes a transport packet of the mobile data, the transport packet including an IP datagram having a network time protocol (NTP) timestamp.

9. The method of claim 8, further comprising:

synchronizing presentation of audio and video of the mobile data based on the NTP timestamp.