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

• US 8,533,762 B2
• Filed: 11/21/2011
• Issued: 09/10/2013
• 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, Sang Hyup, Choi, In Hwan, Lee, Chul Soo, Song, Jae Hyung, Kim, Jeong Woo
• Primary Examiner(s): Kumar, Pankaj
• Assistant Examiner(s): FLYNN, RANDY A
• Application Number:
  US13/301,612
• Publication Number:
  US 20120063424A1
• Time in Patent Office: 659 Days
• Field of Search: 725 62- 63, 455/403, 455/3.01, 455/3.02, 370/312, 375/316
• US Class Current: 725/62
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/23614 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 21/41407 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 21/4348 Demultiplexing of additional data and video streams
• 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 21/4384 involving operations to reduce the access time, e.g. fast-tuning for reducing channel switching latency
• CPC Class Codes: H04N 21/64322 IP
• CPC Class Codes: H04N 21/6437 Real-time Transport Protocol [RTP]
• CPC Class Codes: H04N 7/015 High-definition television systems
• CPC Class Codes: H04N 7/088 the inserted signal being digital
• CPC Class Codes: H04W 4/08 User group management

Abstract

A digital broadcast receiver and a control method thereof are disclosed. The control method of the digital broadcast receiver includes receiving a broadcast signal into which mobile service data and main service data are multiplexed, extracting TPC signaling information and FIC signaling information from a data group in the received mobile service data, acquiring a program table defining a mapping relation between each of all ensembles transmitted at a physical frequency and at least one virtual channel corresponding to the ensemble, using the extracted FIC signaling information, and detecting IP address information required for channel tuning to the at least one virtual channel corresponding to the ensemble, using the acquired program table.

Claims

1. A method of processing broadcast data in a broadcast transmitter, the method comprising:

performing, by a Reed-Solomon (RS) encoder, RS encoding and Cyclic Redundancy Check (CRC) encoding on mobile service data to build an RS frame belonging to an ensemble, wherein data of the RS frame are mapped into data groups and each of the data groups includes known data sequences and transmission parameter channel (TPC) data;

segmenting fast information channel (FIC) data into FIC segment payloads, wherein one of the FIC segment payloads includes information indicating whether service protection is applied to the mobile service data; and

transmitting a transmission frame including data of the data groups and main service data, wherein the transmission frame is made up of k1 sub-frames,

wherein each of the k1 sub-frames includes k2 slots that are time periods for multiplexing the mobile service data and the main service data,

wherein each of the data groups is transmitted during each of the k2 slots,

wherein k1 and k2 are integers greater than 1,

wherein each of the data groups further includes an FIC segment comprising an FIC segment header and one of the FIC segment payloads,

wherein the TPC data includes information for indicating a total number of data groups to be transmitted during one of the k1 sub-frames of the transmission frame, and

wherein the ensemble comprises a service map table (SMT) including access information of the mobile service data.

2. The method of claim 1, wherein:

the SMT is segmented into at least one SMT section;

the at least one SMT section comprises a section header and a section body; and

the section header includes a table identifier for indicating a type of the at least one SMT section, an ensemble identifier for identifying the ensemble and protocol version information for indicating a current protocol version of the at least one SMT section.

3. The method of claim 2, wherein the SMT is differentiated by utilizing at least the table identifier, the ensemble identifier or the protocol version information.

4. The method of claim 1, wherein Internet protocol (IP) datagrams carrying the SMT have a well-known IP address and a well-known user datagram protocol (UDP) port number.

5. The method of claim 1, wherein the TPC data further includes information for indicating a current sub-frame number within the transmission frame.

6. A broadcast transmitter comprising:

a Reed-Solomon (RS) encoder for performing RS encoding and Cyclic Redundancy Check (CRC) encoding on mobile service data to build an RS frame belonging to an ensemble, wherein data of the RS frame are mapped into data groups and each of the data groups includes known data sequences and transmission parameter channel (TPC) data; and

a transmitting unit for transmitting a transmission frame including data of the data groups and main service data, wherein the transmission frame is made up of k1 sub-frames,

wherein each of the k1 sub-frames includes k2 slots that are time periods for multiplexing the mobile service data and the main service data,

wherein each of the data groups is transmitted during each of the k2 slots,

wherein k1 and k2 are integers greater than 1,

wherein fast information channel (FIC) data are segmented into FIC segment payloads,

wherein one of the FIC segment payloads includes information indicating whether service protection is applied to the mobile service data,

wherein each of the data groups further includes an FIC segment comprising an FIC segment header and one of the FIC segment payloads,

wherein the TPC data includes information for indicating a total number of data groups to be transmitted during one of the k1 sub-frames of the transmission frame, and

wherein the ensemble comprises a service map table (SMT) including access information of the mobile service data.

7. The broadcast transmitter of claim 6, wherein:

the SMT is segmented into at least one SMT section;

the at least one SMT section comprises a section header and a section body; and

the section header includes a table identifier for indicating a type of the at least one SMT section, an ensemble identifier for identifying the ensemble and protocol version information for indicating a current protocol version of the at least one SMT section.

8. The broadcast transmitter of claim 7, wherein the SMT is differentiated by utilizing at least the table identifier, the ensemble identifier or the protocol version information.

9. The broadcast transmitter of claim 6, wherein Internet protocol (IP) datagrams carrying the SMT have a well-known IP address and a well-known user datagram protocol (UDP) port number.

10. The broadcast transmitter of claim 6, wherein the TPC data further includes information for indicating a current sub-frame number within the transmission frame.