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

• US 8,199,830 B2
• Filed: 08/25/2008
• Issued: 06/12/2012
• Est. Priority Date: 08/24/2007
• 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, Kwak, Kook Yeon, Kim, Jin Woo, Song, Jae Hyung, Kim, Jin Pil, Song, Won Gyu, Lee, Hyoung Gon, Kim, Byoung Gill, Suh, Jong Yeul
• Primary Examiner(s): HAN, CLEMENCE S
• Application Number:
  US12/198,092
• Publication Number:
  US 20090074079A1
• Time in Patent Office: 1,387 Days
• Field of Search: None
• US Class Current: 375/240.25
• CPC Class Codes: H04J 3/00 Time-division multiplex systems H04J14/00 takes precedence; relay systems H04B7/14; selecting techniques H04Q
• CPC Class Codes: H04L 1/0047 Decoding adapted to other signal detection operation in conjunction with sequence estimation or equalization H04L25/03286
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 27/02 Amplitude-modulated carrier systems, e.g. using on-off keying; Single sideband or vestigial sideband modulation H04L27/32 takes precedence
• 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 21/2381 Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network transmission of MPEG streams over ATM H04L12/5601
• 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 21/4305 Synchronising client clock from received content stream, e.g. locking decoder clock with encoder clock, extraction of the PCR packets arrangements for synchronising receiver with transmitter by comparing receiver clock with transmitter clock H04L7/0012; arrangements for synchronising receiver with transmitter wherein the receiver takes measures against momentary loss of synchronisation H04L7/0083
• CPC Class Codes: H04N 21/4345 Extraction or processing of SI, e.g. extracting service information from an MPEG stream
• CPC Class Codes: H04N 21/4381 Recovering the multiplex stream from a specific network, e.g. recovering MPEG packets from ATM cells transmission of MPEG streams over ATM H04L12/5601
• 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 21/462 Content or additional data management, e.g. creating a master electronic program guide from data received from the Internet and a Head-end, controlling the complexity of a video stream by scaling the resolution or bit-rate based on the client capabilities
• CPC Class Codes: H04N 21/6131 involving transmission via a mobile phone network wireless downlink channel access H04W74/006
• CPC Class Codes: H04W 28/06 Optimizing the usage of the radio link, e.g. header compression, information sizing , discarding information system modifying transmission characteristic according to link quality by modifying frame length H04L1/0007; dynamic adaptation of the packet size for flow control or congestion control H04L47/365
• CPC Class Codes: H04W 72/30 Resource management for broadcast services

Abstract

A digital broadcasting system and a data processing method are disclosed. The data processing method includes receiving a broadcast signal in which main service data and mobile service data are multiplexed, demodulating the broadcast signal to acquire fast-information-channel signaling information including reference time information for a system clock, and outputting demodulation time information of a specific position of a frame of the broadcast signal, decoding the fast-information-channel signaling information, and establishing the reference time information as the system clock at a demodulation time according to on the outputted demodulation time information and decoding the mobile service data according to the system clock.

Claims

1. A method of transmitting a broadcast signal, 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 time periods for the multiplexing of the mobile data and the main data,

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 having a version of the FIC data,

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

wherein the plurality of FIC segments are interleaved within a sub-frame of the transmission frame,

wherein each of the FIC segments including an FIC segment header is transmitted in each of the data groups,

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

wherein the mobile data belonging to the ensemble is Reed-Solomon (RS)-cyclic redundancy check (CRC) encoded through a 2-dimensional RS frame, and

wherein a row of a payload of the RS frame includes a transport packet of the mobile data.

2. The method of claim 1, wherein the FIC data includes information indicating whether service protection is applied to the service.

3. The method of claim 1,

wherein the mobile data includes time reference information according to a network time protocol (NTP), and

wherein the time reference information for the service is periodically transmitted via the broadcast signal.

4. A method of receiving a broadcast signal, the method comprising:

receiving the broadcast signal including a transmission frame,

wherein receiving the broadcast signal comprises receiving a parade of data groups during slots within the transmission frame, the slots being time periods in which mobile data and main data are multiplexed, and

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

demodulating the broadcast signal;

obtaining, from the signaling information of the demodulated broadcast signal, fast information channel (FIC) data including binding information between a service of the mobile data and an ensemble, and transmission parameter channel (TPC) data having a version of the FIC data,

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

wherein the plurality of FIC segments are interleaved within a sub-frame of the transmission frame,

wherein each of the FIC segments including an FIC segment header 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,

wherein the RS frame comprises a 2-dimensional data frame through which the mobile data belonging to the ensemble is RS-cyclic redundancy check (CRC) encoded, and

wherein a row of a payload of the RS frame includes a transport packet of the mobile data; and

decoding the built RS frame.

5. The method of claim 4, wherein the FIC data includes information indicating whether service protection is applied to the service.

6. The method of claim 4, wherein the mobile data includes time reference information according to a network time protocol (NTP) that is periodically received via the broadcast signal.

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

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

a transmitter 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 time periods for multiplexing of the mobile data and the main data,

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 having a version of the FIC data,

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

wherein the plurality of FIC segments are interleaved within a sub-frame of the transmission frame,

wherein each of the FIC segments including an FIC segment header is transmitted in each of the data groups,

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

wherein the mobile data belonging to the ensemble is Reed-Solomon (RS)-cyclic redundancy check (CRC) encoded through a 2-dimensional RS frame, and

wherein a row of a payload of the RS frame includes a transport packet of the mobile data.

8. The apparatus of claim 7, wherein the FIC data includes information indicating whether service protection is applied to the service.

9. The apparatus of claim 7, wherein the mobile data includes time reference information according to a network time protocol (NTP) that is periodically transmitted via the broadcast signal.

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

a receiver 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 time periods in which mobile data and main data are multiplexed, and

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

a demodulator configured to demodulate the broadcast signal and to obtain, from the signaling information of the demodulated broadcast signal, fast information channel (FIC) data including binding information between a service of the mobile data and an ensemble, and transmission parameter channel (TPC) data having a version of the FIC data,

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

wherein the plurality of FIC segments are interleaved within a sub-frame of the transmission frame,

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

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

a Reed-Solomon (RS) frame decoder configured to build an RS frame corresponding to the ensemble by collecting a plurality of data portions which are mapped to the data groups, and to decode the built RS frame,

wherein the RS frame comprises a 2-dimensional data frame through which the mobile data belonging to the ensemble is RS-cyclic redundancy check (CRC) encoded, and

wherein a row of a payload of the RS frame includes a transport packet of the mobile data.

11. The apparatus of claim 10, wherein the FIC data includes information indicating whether service protection is applied to the service.

12. The apparatus of claim 10, wherein the mobile data includes time reference information according to a network time protocol (NTP) that is periodically received via the broadcast signal.