Digital broadcasting system and method of processing data

• US RE47,462 E1
• Filed: 08/26/2015
• Issued: 06/25/2019
• Est. Priority Date: 07/06/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Song, Jae Hyung, Choi, In Hwan, Hong, Ho Taek, Kwak, Kook Yeon, Kim, Byoung Gill, Suh, Jong Yeul, Kim, Jin Pil, Song, Won Gyu, Lee, Chul Soo, Kim, Jin Woo, Lee, Hyoung Gon, Lee, Joon Hui
• Primary Examiner(s): Worjloh, Jalatee
• Application Number:
  US14/836,832
• Time in Patent Office: 1,399 Days
• Field of Search: 725 54, 725116, 725 62, 375265, 714755
• CPC Class Codes: N/A

Abstract

A digital broadcast system and a data processing method are disclosed. A receiving system of the digital broadcast system includes a signal receiving unit, a demodulating unit, a program table decoder, and a controller. The signal receiving unit receives a broadcast signal in which at least one parade and main service data are multiplexed, each parade including mobile service data and data of at least one section of a program table for decoding the mobile service data. The demodulating unit demodulates data of at least one parade included in the broadcast signal. The program table decoder scans at least one demodulated parade, receives each section of the program table from the scanned parade to construct a corresponding program table, and parses the constructed program table to output program table information. The controller controls decoding of the demodulated mobile service data according to the parsed program table information.

Claims

1. A receiving system comprising:

a signal receiving unit tuner configured to receive a broadcast signal including a parade of data groups and main service data, wherein at least one of the data groups includes a plurality of data blocks, signaling information and known data sequences and wherein the signaling information is inserted into a fourth data block of the plurality of data blocks,

wherein a first known data sequence of the known data sequences is located in a third data block of the plurality of data blocks, second and third known data sequences of the known data sequences are located in a fourth data block of the plurality of data blocks, and fourth, fifth and sixth known data sequences of the known data sequences are located, respectively, in fifth, sixth and seventh data blocks of the plurality of data blocks,

wherein the first, third, fourth, fifth and sixth known data sequences are spaced apart by specific segments and have the same pattern;

a demodulating unit demodulator configured to demodulate the broadcast signal;

a known sequence detector configured to detect at least one of the known data sequences;

an equalizer configured to perform channel equalization upon on the demodulated broadcast signal using the detected at least one known data sequence;

a signaling information decoder configured to decode the signaling information, wherein the signaling information includes a Reed Solomon (RS) frame mode indicating the number of RS frames built per the parade; and

a decoder configured to decode mobile service data to build the RS frames including the mobile service data depending on the RS frame mode, wherein the decoder builds one RS frame is built when the RS frame mode indicates a single frame mode, and wherein the decoder builds two RS frames are built when the RS frame mode indicates a dual frame mode,

wherein at least one of the RS frames includes a plurality of packets,

wherein each of the plurality of packets includes a header and a payload,

wherein the payload includes a plurality of Internet Protocol (IP) datagrams, and

wherein the header includes point field information indicating a starting point of a first new IP datagram in the payload.

2. A method of a receiving system, the method comprising:

receiving a broadcast signal including a parade of data groups and main service data, wherein at least one of the data groups includes a plurality of data blocks, signaling information and known data sequences and wherein the signaling information is inserted into a fourth data block of the plurality of data blocks,

wherein a first known data sequence of the known data sequences is located in a third data block of the plurality of data blocks, second and third known data sequences of the known data sequences are located in a fourth data block of the plurality of data blocks, and fourth, fifth and sixth known data sequences of the known data sequences are located, respectively, in fifth, sixth and seventh data blocks of the plurality of data blocks,

wherein the first, third, fourth, fifth and sixth known data sequences are spaced apart by specific segments and have the same pattern;

demodulating the broadcast signal;

detecting at least one of the known data sequences;

performing channel equalization upon the demodulated broadcast signal using the detected at least one known data sequence;

decoding the signaling information, wherein the signaling information includes a Reed Solomon (RS) frame mode indicating the number of RS frames built per the parade; and

decoding mobile service data to build the RS frames including the mobile service data depending on the RS frame mode, wherein one RS frame is built when the RS frame mode indicates a single frame mode, and wherein two RS frames are built when the RS frame mode indicates a dual frame mode,

wherein at least one of the RS frames includes a plurality of packets,

wherein each of the plurality of packets includes a header and a payload,

wherein the payload includes a plurality of Internet Protocol (IP) datagrams, and

wherein the header includes point field information indicating a starting point of a first new IP datagram in the payload.

3. A method of transmitting a broadcast signal, the method comprising:

encoding mobile data for forward error correction (FEC) to build Reed Solomon (RS) frames and dividing the RS frames into a plurality of portions;

dividing the plurality of portions into a plurality of Serial Concatenated Convolutional Coding (SCCC) blocks for outer-encoding;

mapping the plurality of SCCC blocks to data blocks according to an SCCC block mode, wherein the SCCC block mode identifies a relationship between an SCCC block and a data block,

wherein a single SCCC block is mapped to a single data block when the SCCC block mode indicates a single mode, and wherein a single SCCC block is divided into two data blocks when the SCCC block mode indicates a pair mode;

encoding signaling information, wherein the signaling information includes the SCCC block mode;

forming data groups including the encoded signaling information and known data sequences wherein each of the data groups includes the data blocks;

packet formatting a mobile data packet including data of the at least one of the data groups;

multiplexing mobile data in the mobile data packet and main data in a main data packet; and

transmitting a transmission frame including the multiplexed data, wherein a parade of the data groups is transmitted in the transmission frame,

wherein each of the data groups includes a plurality of regions, and the plurality of regions includes the data blocks, wherein a first region includes four central data blocks of the data blocks, a second region includes two data blocks which are concentric about the first region, a third region includes two data blocks which are concentric about the first and second regions, and a fourth region includes two data blocks which are concentric about the first, second and third regions,

wherein a first known data sequence of the known data sequences is located in a third data block of the plurality of data blocks, second and third known data sequences of the known data sequences are located in a fourth data block of the plurality of data blocks, and fourth, fifth and sixth known data sequences of the known data sequences are located, respectively, in fifth, sixth and seventh data blocks of the plurality of data blocks,

wherein the first, third, fourth, fifth and sixth known data sequences are spaced apart by specific segments and have the same pattern,

wherein at least one of the RS frames includes a plurality of packets,

wherein each of the plurality of packets includes a header and a payload,

wherein the payload includes a plurality of Internet Protocol (IP) datagrams, and

wherein the header includes point field information indicating a starting point of a first new IP datagram in the payload.

4. The method of claim 3, wherein:

encoding the mobile data to build the RS frames is dependent on an RS frame mode, wherein; and

the RS frame mode indicates the number of RS frames built per the parade.

5. The method of claim 4, wherein:

one RS Frame is built when the RS frame mode indicates a single frame mode, or wherein; and

two RS Frames are built when the RS frame mode indicates a dual frame mode.

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

an encoder configured to encode mobile data for forward error correction (FEC) to build Reed Solomon (RS) frames and divide the RS frames into a plurality of portions;

a converter configured to divide the plurality of portions into a plurality of Serial Concatenated Convolutional Coding (SCCC) blocks for outer-encoding;

a mapper configured to map the plurality of SCCC blocks to data blocks according to an SCCC block mode, wherein the SCCC block mode identifies a relationship between an SCCC block and a data block,

wherein a single SCCC block is mapped to a single data block when the SCCC block mode indicates a single mode, and wherein a single SCCC block is divided into two data blocks when the SCCC block mode indicates a pair mode;

a signaling encoder configured to encode signaling information, wherein the signaling information includes the SCCC block mode;

a group formatter configured to form data groups including the encoded signaling information and known data sequences, wherein each of the data groups includes the data blocks;

a packet formatter configured to format a mobile data packet including data of the at least one of the data groups;

a multiplexer configured to multiplex mobile data in the mobile data packet and main data in a main data packet; and

a transmission unit transmitter configured to transmit a transmission frame including the multiplexed data, wherein a parade of the data groups is transmitted in the transmission frame,

wherein each of the data groups includes a plurality of regions, and the plurality of regions includes the data blocks, wherein a first region includes four central data blocks of the data blocks, a second region includes two data blocks which are concentric about the first region, a third region includes two data blocks which are concentric about the first and second regions, and a fourth region includes two data blocks which are concentric about the first, second and third regions,

wherein a first known data sequence of the known data sequences is located in a third data block of the plurality of data blocks, second and third known data sequences of the known data sequences are located in a fourth data block of the plurality of data blocks, and fourth, fifth and sixth known data sequences of the known data sequences are located, respectively, in fifth, sixth and seventh data blocks of the plurality of data blocks,

wherein the first, third, fourth, fifth and sixth known data sequences are spaced apart by specific segments and have the same pattern,

wherein at least one of the RS frames includes a plurality of packets,

wherein each of the plurality of packets includes a header and a payload,

wherein the payload includes a plurality of Internet Protocol (IP) datagrams, and

wherein the header includes point field information indicating a starting point of a first new IP datagram in the payload.

7. The apparatus of claim 6, wherein:

encoding the mobile data to build the RS frames is dependent on an RS frame mode, wherein; and

the RS frame mode indicates the number of RS frames built per the parade.

8. The apparatus of claim 7, wherein:

the encoder builds one RS Frame when the RS frame mode indicates a single frame mode, and wherein; and

the encoder builds two RS Frames when the RS frame mode indicates a dual frame mode.

9. A method of transmitting broadcast signals, the method comprising:

generating FEC frames by Forward Error Correction (FEC) encoding data in first packets to add parity data, wherein the first packets include service data and service signaling information to access a service and wherein the service signaling information includes service type information and channel information;

block interleaving data in the FEC frames;

convolutional interleaving the block interleaved data;

encoding transmission parameters that include information related to the parity data; and

transmitting the broadcast signals including the convolutional interleaved data and the encoded transmission parameters,

wherein the FEC frames include the first packets,

wherein each of the first packets includes a header and a payload,

wherein each header includes pointer field information,

wherein the pointer field information is used to indicate a starting point of a second packet when the second packet starts in the payload,

wherein the second packet includes at least one of the service data and the service signaling information, and

wherein the pointer field information has a maximum value when there is no second packet starting in the payload.

10. A method of receiving broadcast signals, the method comprising:

receiving the broadcast signals including service data, service signaling information to access a service and transmission parameters, wherein the service signaling information includes service type information and channel information;

demodulating the received broadcast signals;

decoding the transmission parameters in the demodulated broadcast signals;

deinterleaving the service data and the service signaling information in the demodulated broadcast signals; and

decoding forward error correction (FEC) frames based on parity data, the FEC frames including first packets that include the service data and the service signaling information,

wherein each of the first packets includes a header and a payload,

wherein each header includes pointer field information,

wherein the pointer field information is used to indicate a starting point of a second packet when the second packet starts in the payload,

wherein the second packet includes at least one of the service data and the service signaling information,

wherein the pointer field information has a maximum value when there is no second packet starting in the payload, and

wherein the transmission parameters include information related to the parity data.