DTV transmitting system and method of processing DTV signal

• US RE46,437 E1
• Filed: 10/14/2014
• Issued: 06/13/2017
• Est. Priority Date: 04/06/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Hyoung Gon, Kwak, Kook Yeon, Kim, Byoung Gill, Choi, In Hwan, Kim, Jin Woo, Kim, Jong Moon, Song, Won Gyu
• Primary Examiner(s): Leung, Christina Y
• Application Number:
  US14/514,056
• Time in Patent Office: 973 Days
• Field of Search: 37524007, 37524027, 375295, 375265, 375285, 375296, 375346, 375350, 348723, 348724
• 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 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/006 Trellis-coded modulation
• CPC Class Codes: H04L 1/0061 Error detection codes
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 2027/0026 Correction of carrier offset
• CPC Class Codes: H04L 25/0232 by interpolation between sounding signals
• CPC Class Codes: H04L 25/03159 operating in the frequency domain H04L25/03165, H04L25/03178 take precedence
• CPC Class Codes: H04L 25/03273 with carrier recovery circuitry
• CPC Class Codes: H04L 25/03292 with channel estimation circuitry
• CPC Class Codes: H04N 21/2389 Multiplex stream processing, e.g. multiplex stream encrypting
• 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 21/6131 involving transmission via a mobile phone network wireless downlink channel access H04W74/006
• CPC Class Codes: H04N 5/4401 for the reception of a digital modulated video signal

Abstract

A digital television (DTV) transmitting system is provided that includes an encoder, a group formatter, a packet formatter and a transmission unit. The group formatter forms data groups where the plurality of second known data sequences are spaced 16 segments apart within at least one of the data groups that includes a transmission parameter inserted between the first known data sequence and the plurality of second known data sequences and the first known data sequence has a first M-symbol sequence and a second M-symbol sequence, the first M-symbol sequence and the second M-symbol sequence have a first pattern, each of the plurality of second known data sequences has a second pattern other than the first pattern, and the second pattern is positioned from a last symbol to a previous N symbol in each of the plurality of second known data sequences.

Claims

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

an encoder configured to encode mobile data for Forward Error Correction (FEC);

a group formatter configured to form data groups, wherein at least one the data groups includes the encoded mobile data, a first known data sequence, and a plurality of second known data sequences;

a packet formatter configured to format packets including data in the data groups; and

a transmission unit configured to transmit the broadcast signal including the packets,

wherein the plurality of second known data sequences are spaced 16 segments apart within the at least one of the data groups,

wherein the at least one of the data groups includes a transmission parameter inserted between the first known data sequence and one of the plurality of second known data sequences,

wherein the first known data sequence has a first M-symbol sequence and a second M-symbol sequence,

wherein the first M-symbol sequence and the second M-symbol sequence have a first pattern,

wherein each of the plurality of second known data sequences has a second pattern other than the first pattern, and

wherein the second pattern is positioned from a last symbol to a previous N symbol in each of the plurality of second known data sequences.

2. The apparatus of claim 1, further comprising a block processor configured to perform block processing on the encoded mobile data.

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

encoding mobile data for Forward Error Correction (FEC);

forming data groups, wherein at least one of the data groups includes the encoded mobile data, a first known data sequence, and a plurality of second known data sequences;

formatting packets including data in the data groups; and

transmitting the broadcast signal including the packets,

wherein the plurality of second known data sequences are spaced 16 segments apart within the at least one of the data groups,

wherein the at least one of the data groups includes a transmission parameter inserted between the first known data sequence and one of the plurality of second known data sequences,

wherein the first known data sequence has a first M-symbol sequence and a second M-symbol sequence,

wherein the first M-symbol sequence and the second M-symbol sequence have a first pattern,

wherein each of the plurality of second known data sequences has a second pattern other than the first pattern, and

wherein the second pattern is positioned from a last symbol to a previous N symbol in each of the plurality of second known data sequences.

4. The method of claim 3, further comprising performing block processing on the encoded mobile data.

5. A method for processing broadcast data in a transmitter, the method comprising:

first encoding the broadcast data,

wherein the broadcast data is carried in packets and the packets are mapped to frames which are units for forward error correction (FEC) encoding,

wherein the packets are mapped to a frame in order and the packets are split in byte units and mapped to the frame;

second encoding the first-encoded broadcast data by an error detection encoding method;

third encoding the second-encoded broadcast data based on different code rates;

interleaving the third-encoded broadcast data,

wherein dummy data is included in a memory for the interleaving and a number of interleaving data added by the dummy data are larger than a number of data to be interleaved in the interleaving operation;

modulating signal frames including known data and the interleaved broadcast data; and

transmitting a broadcast signal carrying the modulated signal frames,

wherein the known data are used for channel estimation, and

wherein the known data include at least two pre-defined patterns and are inserted in predetermined positions in the signal frames,

wherein the signal frames carry different regions for the broadcast data, the different regions having broadcast data encoded in the different code rates, and

wherein the signal frames further include signaling information and the signaling information includes information related to the different code rates.