Digital broadcasting system and method of processing data

• US 7,986,715 B2
• Filed: 06/30/2008
• Issued: 07/26/2011
• Est. Priority Date: 06/29/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Song, Wen Gyu, Kim, Byoung Gill, Suh, Jong Yeul, Lee, Hyoung Gon, Hong, Ho Taek, Choi, In Hwan, Lee, Chul Soo, Kim, Jin Pil, Song, Jae Hyung, Kwak, Kook Yeon, Kim, Jin Woo, Lee, Joon Hui
• Primary Examiner(s): WONG, XAVIER S
• Application Number:
  US12/165,162
• Publication Number:
  US 20090034556A1
• Time in Patent Office: 1,121 Days
• Field of Search: 370470-476, 370/522, 370/523, 370/528, 370/529, 725/105, 725109-114, 725/118, 725/135, 725/136, 725/143, 375/240
• US Class Current: 370/470
• 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 13/23 using convolutional codes, e.g. unit memory codes
• CPC Class Codes: H03M 13/2912 omitting parity on parity
• CPC Class Codes: H03M 13/2915 with an error detection code in one dimension
• CPC Class Codes: H03M 13/2945 using at least three error correction codes H03M13/2957 takes precedence
• CPC Class Codes: H04H 20/30 by a single channel
• CPC Class Codes: H04H 20/55 for traffic information
• CPC Class Codes: H04H 20/57 for mobile receivers
• CPC Class Codes: H04H 60/72 using electronic programme guides [EPG] focusing on identifying broadcast space time H04H60/39 ; menu type display of EPG in television receivers H04N21/47
• CPC Class Codes: H04J 3/02 Details electronic switching or gating H03K17/00
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0058 Block-coded modulation
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 69/22 Parsing or analysis of headers
• 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 21/4345 : 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 21/4381 : 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 21/6437 : Real-time Transport Protocol [RTP]
• CPC Class Codes: H04W 24/02 : Arrangements for optimising operational condition

Abstract

The present invention relates to a digital broadcasting system for transmitting/receiving a digital broadcasting signal and a method of processing data. In one aspect of the present invention provides a method of processing data, the method including receiving a broadcasting signal in which mobile service data and main service data are multiplexed, demodulating the received broadcasting signal, obtaining an identifier indicating that data frame of the broadcasting signal includes service guide information, decoding and storing the service guide information from the data frame; and outputting a service included in the mobile service data according to the decoded service guide information.

Claims

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

receiving a broadcasting signal including a transmission frame at a tuner, 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, and wherein each data group includes the mobile data, signaling information and known data sequences;

demodulating, at a demodulator, the received broadcasting signal and obtaining, from the signaling information, fast information channel (FIC) data having cross layer information between a physical layer and an upper layer and transmission parameter channel (TPC) data indicating a version of the FIC data, wherein the TPC data are multiplexed with the FIC data, wherein the TPC data are Reed-Solomon (RS)-encoded data, and the FIC data are block-interleaved data after being RS-encoded;

building, at a decoder, a Reed-Solomon (RS) frame corresponding to an ensemble of a service of the mobile data by collecting a plurality of data portions which are mapped to the data groups, the RS frame being a 2-dimensional data frame through which the mobile data belonging to the ensemble is Reed Solomon-cyclic redundancy check (RS-CRC) encoded; and

performing error detection on the RS frame and error correction decoding on data in the RS frame at the decoder, wherein a payload of the RS frame includes 187 transport packets of the mobile data, each of the transport packets including a 2-byte header, wherein the header includes an error indicator indicating whether an error is detected in a transport packet and the transport packet includes an Internet protocol (IP) datagram.

2. The method according to claim 1, wherein the broadcasting signal includes information on capability of a server for providing service guide data and the information on the capability of the server comprises at least complete, complement or repair.

3. The method according to claim 2, wherein the information on the capability of the server in the broadcasting signal is represented in a bitwise form.

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

pre-processing mobile data at a pre-processor, wherein pre-processing the mobile data comprises;

encoding a 2-dimensional Reed-Solomon (RS) frame through which the mobile data belonging to an ensemble including a service is Reed Solomon-cyclic redundancy check (RS-CRC) encoded, wherein the encoded RS frame is separated to a plurality of portions,

encoding signaling information including fast information channel (FIC) data and transmission parameter channel (TPC) data, wherein the FIC data have cross layer information between a physical layer and an upper layer and the TPC data indicate a version of the FIC data, wherein the TPC data are RS encoded, the FIC data are RS encoded and the RS-encoded FIC data are block-interleaved, and wherein the RS-encoded TPC data and the block-interleaved FIC data are multiplexed,

forming data groups of the mobile data, wherein each data group includes the signaling information, known data sequences and one of the plurality of portions, and

forming mobile data packets including data in the data group;

multiplexing the mobile data packets and main data packets including main data at a multiplexer;

performing systematic RS encoding on the main data in the multiplexed mobile and main data packets and non-systematic RS encoding on the mobile data in the multiplexed mobile and main data packets at an encoder; and

transmitting a transmission frame including the RS-encoded main data and mobile data at a transmission unit, wherein a parade of the formed data groups is transmitted during slots in the transmission frame, the slots being basic time periods for multiplexing of the mobile data and the main data, wherein a payload of the RS frame includes 187 transport packets of the mobile data, each of the transport packets including a 2-byte header, wherein the header includes an error indicator indicating whether an error is detected in a transport packet and the transport packet includes an Internet protocol (IP) datagram.

5. The method according to claim 4, wherein the broadcasting signal includes information on capability of a server for providing service guide data and the information on the capability of the server comprises at least complete, complement or repair.

6. The method according to claim 5, wherein the information on the capability of the server in the broadcasting signal is represented in a bitwise form.

7. A digital broadcasting system comprising:

a receiving unit configured to receive a broadcasting 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 of mobile data and main data, and wherein each data group includes the mobile data, signaling information and known data sequences;

a demodulator configured to demodulate the received broadcasting signal and obtain, from the signaling information, fast information channel (FIC) data having cross layer information between a physical layer and an upper layer and transmission parameter channel (TPC) data indicating a version of the FIC data wherein the TPC data are multiplexed with the FIC data, wherein the TPC data are Reed-Solomon (RS)-encoded data, and the FIC data are block-interleaved data after being RS-encoded and

an RS frame decoder configured to build a Reed-Solomon (RS) frame corresponding to an ensemble of a service of the mobile data by collecting a plurality of data portions which are mapped to the data groups, to perform error detection on the RS frame and perform error correction decoding on data in the RS frame, wherein the RS frame is a 2-dimensional data frame through which the mobile data belonging to the ensemble is Reed-Solomon-cyclic redundancy check (RS-CRC) encoded, wherein a payload of the RS frame includes 187 transport packets of the mobile data, each of the transport packets including a 2-byte header, and wherein the header includes an error indicator indicating whether an error is detected in a transport packet and the transport packet includes an Internet protocol (IP) datagram.

8. The digital broadcasting system according to claim 7, wherein the broadcasting signal includes information on capability of a server for providing service guide data and the information on the capability of the server comprises at least complete, complement or repair.

9. The digital broadcasting system according to claim 8, wherein the information on the capability of the server is represented in a bitwise form.

10. A digital broadcasting system comprising:

a pre-processor configured to pre-process mobile data, the pre-processor comprising;

a first encoder configured to encode a 2-dimensional Reed-Solomon (RS) frame through which the mobile data belonging to an ensemble including a service is Reed Solomon-cyclic redundancy check (RS-CRC) encoded, wherein the encoded RS frame is separated to a plurality of portions,

a signaling information encoder configured to encoding signaling information including fast information channel (FIC) data and transmission parameter channel (TPC) data, wherein the FIC data have cross layer information between a physical layer and an upper layer and the TPC data indicate a version of the FIC data, wherein the TPC data are RS encoded, the FIC data are RS encoded and the RS-encoded FIC data are block-interleaved, and wherein the RS-encoded TPC data and the block-interleaved FIC data are multiplexed,

a group formatter configured to form data groups of the mobile data, wherein each data group includes the signaling information, known data sequences and one of the plurality of portions, and

a packet formatter configured to form mobile data packets including data in the data group;

a multiplexer configured to multiplex the mobile data packets and main data packets including main data;

a second encoder configured to perform systematic RS encoding on the main data in the multiplexed mobile and main data packets and non-systematic RS encoding on the mobile data in the multiplexed mobile and main data packets; and

a transmitter configured to transmit a transmission frame including the RS-encoded main data and mobile data, wherein a parade of the formed data groups is transmitted during slots in the transmission frame, the slots being basic time periods for multiplexing of the mobile data and the main data, wherein a payload of the RS frame includes 187 transport packets of the mobile data, each of the transport packets including a 2-byte header, and wherein the header includes an error indicator indicating whether an error is detected in a transport packet and the transport packet includes an Internet protocol (IP) datagram.

11. The digital broadcasting system of claim 10, wherein the IP datagram delivers service guide data.

12. The digital broadcasting system of claim 11, wherein the service guide data is delivered via a file delivery session carrying an announcement channel.

13. The digital broadcasting system of claim 12, wherein the file delivery session is file delivery over unidirectional transport (FLUTE) for file transport.

14. The digital broadcasting system of claim 12, wherein the service guide data includes a plurality of fragments and a list of the plurality of fragments is declared in a descriptor delivered through the announcement channel.