DTV receiving system and method of processing DTV signal

• US 8,731,100 B2
• Filed: 06/06/2012
• Issued: 05/20/2014
• Est. Priority Date: 03/26/2007
• Status: Active Grant

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Jong Moon, Choi, In Hwan, Kwak, Kook Yeon, Kim, Byoung Gill, Song, Won Gyu, Kim, Jin Woo, Lee, Hyoung Gon
• Primary Examiner(s): Washburn, Daniel
• Assistant Examiner(s): HAILEGIORGIS, FITWI Y
• Application Number:
  US13/490,401
• Publication Number:
  US 20120246541A1
• Time in Patent Office: 713 Days
• Field of Search: 375/316, 375/295, 375/296, 375/240
• US Class Current: 375/295
• CPC Class Codes: H04L 1/006 Trellis-coded modulation
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/007 Unequal error protection for format H04L1/0078; for codes per se H03M13/35
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• CPC Class Codes: H04L 27/066 Carrier recovery circuits H04L27/2271 takes precedence
• CPC Class Codes: H04L 27/2272 using phase locked loops H04L27/2273 takes precedence
• CPC Class Codes: H04L 7/027 extracting the synchronising or clock signal from the received signal spectrum, e.g. by using a resonant or bandpass circuit
• CPC Class Codes: H04L 7/042 Detectors therefor, e.g. correlators, state machines digital correlators in general G06F17/15
• CPC Class Codes: H04N 21/2353 specifically adapted to content descriptors, e.g. coding, compressing or processing of metadata
• 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 21/426 Internal components of the client ; Characteristics thereof H04N5/44 takes precedence
• 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 5/455 Demodulation-circuits

Abstract

A method of processing broadcast data in a broadcast transmitting system includes randomizing mobile service data bytes; generating a Reed-Solomon (RS) frame; dividing the RS frame into RS frame portions; converting data bytes of the RS frame portions into data bits; encoding each converted data bit and outputting data symbols corresponding to the encoded data bits; interleaving the data symbols; converting the interleaved data symbols into data bytes; forming data groups including mobile service data corresponding to the converted data bytes, each of the data groups including known data sequences, signaling information, non-systematic RS parity data place holders and MPEG header data place holders; removing the non-systematic RS parity data place holders in the data groups and replacing the MPEG header data place holders in the data groups with MPEG header data to output mobile service data packets; and randomizing the MPEG header data in the mobile service data packets.

Claims

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

randomizing, by a randomizer, mobile service data bytes;

generating a Reed-Solomon (RS) frame by adding RS parity data bytes to bottom ends of columns of an RS frame payload and by adding Cyclic Redundancy Check (CRC) data bytes to right ends of rows of the RS frame payload having the RS parity data bytes, the RS frame payload including the randomized mobile service data bytes;

dividing the RS frame into RS frame portions;

converting data bytes of the RS frame portions into data bits;

encoding each of the converted data bits at a coding rate of 1/H and outputting data symbols corresponding to the encoded data bits, wherein H>

1;

interleaving, by an interleaver, the data symbols according to the following equation;

P(i)={S×

i×

(i+1)/2} mod L,

wherein 0≦

i≦

L−

1, L=2ⁿ, n and S are integers;

converting the interleaved data symbols into data bytes;

forming data groups including mobile service data corresponding to the converted data bytes, wherein each of the data groups further includes known data sequences, signaling information, non-systematic RS parity data place holders and Moving Picture Experts Group (MPEG) header data place holders;

removing the non-systematic RS parity data place holders in the data groups and replacing the MPEG header data place holders in the data groups with MPEG header data to output mobile service data packets;

adjusting at least one of main service data packets including main service data to compensate for temporal displacement of the main service data packets;

multiplexing the mobile service data packets and the main service data packets; and

randomizing, by a modified randomizer, the MPEG header data in the mobile service data packets and all data in the main service data packets,

wherein the signaling information comprises information for identifying a collection of the data groups.

2. The method of claim 1, further comprising:

encoding the signaling information; and

interleaving the encoded signaling information and outputting the interleaved signaling information to include in each of the data groups.

3. The method of claim 1, wherein the signaling information further includes information related to the RS frame.

4. The method of claim 1, wherein each of the data groups comprises regions A, B and C, wherein the region A is central, the region B is concentric about the region A, and the region C is concentric about the regions A and B.

5. The method of claim 4, wherein the region A includes the known data sequences and the signaling information.

6. A broadcast transmitting system comprising:

a randomizer for randomizing mobile service data bytes;

a Reed-Solomon (RS) frame encoder for generating an RS frame by adding RS parity data bytes to bottom ends of columns of an RS frame payload that includes the randomized mobile service data bytes and by adding Cyclic Redundancy Check (CRC) data bytes to right ends of rows of the RS frame payload having the RS parity data bytes and dividing the generated RS frame into RS frame portions;

a byte to bit converter for converting data bytes of the RS frame portions into data bits;

an encoder for encoding each of the converted data bits at a coding rate of 1/H and outputting data symbols corresponding to the encoded data bits, wherein H>

1;

an interleaver interleaving the data symbols according to the following equation;

P(i)={S×

i×

(i+1)/2} mod L,

wherein 0<

i≦

L−

1, L=2ⁿ, n and S are integers;

a symbol to byte converter for converting the interleaved data symbols into data bytes;

a group formatter for forming data groups including mobile service data corresponding to the converted data bytes, wherein each of the data groups further includes known data sequences, signaling information, non-systematic RS parity data place holders and Moving Picture Experts Group (MPEG) header data place holders;

a packet formatter for removing the non-systematic RS parity data place holders in the data groups and replacing the MPEG header data place holders in the data groups with MPEG header data to output mobile service data packets;

a packet timing adjustment unit for adjusting at least one of main service data packets including main service data to compensate for temporal displacement of the main service data packets;

a multiplexer for multiplexing the mobile service data packets and the main service data packets; and

a modified randomizer for randomizing the MPEG header data in the mobile service data packets and all data in the main service data packets,

wherein the signaling information comprises information for identifying a collection of the data groups.

7. The broadcast transmitting system of claim 6, wherein each of the data groups includes the signaling information on which encoding and interleaving processes are performed.

8. The broadcast transmitting system of claim 6, wherein the signaling information further includes information related to the RS frame.

9. The broadcast transmitting system of claim 6, wherein each of the data groups comprises regions A, B and C and wherein the region A is central, the region B is concentric about the region A, and the region C is concentric about the regions A and B.

10. The broadcast transmitting system of claim 9, wherein the region A includes the known data sequences and the signaling information.