DTV transmitting system and method of processing DTV signal

• US 8,223,884 B2
• Filed: 10/24/2011
• Issued: 07/17/2012
• Est. Priority Date: 03/26/2007
• Status: Expired due to Fees

• 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): Williams, Lawrence B
• Application Number:
  US13/280,263
• Publication Number:
  US 20120038831A1
• Time in Patent Office: 267 Days
• Field of Search: 375/240, 375/240.01, 375/240.18, 375/240.24, 375259-260, 375/265, 375/270, 375/277, 375/295, 375/301, 375/316, 375/340, 375/350, 348/608, 348723-726, 348/729, 370485-487, 386 65- 66, 386/71, 386 84- 85, 386/88, 386/98, 714/751, 714755-758, 714/776
• 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 broadcast transmitting system includes a first randomizer randomizing mobile service data bytes; a Reed-Solomon (RS) frame encoder generating an RS frame and dividing the RS frame into RS frame portions; a first interleaver interleaving symbols corresponding to data in the RS frame portions; a group formatter forming data groups including data corresponding to the interleaved symbols, each data group including known data sequences, signaling information, non-systematic RS parity data place holders and MPEG header data place holders; a packet formatter 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 Moving Picture Experts Group (MPEG) header data in order to output mobile service data packets; and a second randomizer 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 first 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 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;

interleaving, by a first interleaver, symbols corresponding to data in the RS frame portions 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;

forming data groups including data corresponding to the interleaved symbols, 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; and

randomizing, by a second randomizer, the MPEG header data in the mobile service data packets,

wherein the signaling information includes information indicating a number of the RS parity data bytes.

2. The method of claim 1, further comprising deinterleaving data of the data groups.

3. The method of claim 1, further comprising performing non-systematic RS encoding on the mobile service data packets to insert non-systematic RS parity data into the mobile service data packets.

4. The method of claim 3, further comprising interleaving data of the non-systematic RS encoded mobile service data packets in a second interleaver.

5. A broadcast transmitting system, comprising:

a first randomizer configured to randomize mobile service data bytes;

a Reed-Solomon (RS) frame encoder configured to generate an RS frame by adding RS parity data bytes to bottom ends of columns of an RS frame payload and 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, and to divide the RS frame into RS frame portions;

a first interleaver configured to interleave symbols corresponding to data in the RS frame portions 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 group formatter configured to form data groups including data corresponding to the interleaved symbols, 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 configured to remove the non-systematic RS parity data place holders in the data groups and to replace the MPEG header data place holders in the data groups with MPEG header data in order to output mobile service data packets; and

a second randomizer configured to randomize the MPEG header data in the mobile service data packets,

wherein the signaling information includes information indicating a number of the RS parity data bytes.

6. The broadcast transmitting system of claim 5, further comprising a deinterleaver configured to deinterleaver data of the data groups.

7. The broadcast transmitting system of claim 5, further comprising an RS encoder configured to perform non-systematic RS encoding on the mobile service data packets to insert non-systematic RS parity data into the mobile service data packets.

8. The broadcast transmitting system of claim 7, further comprising a second interleaver configured to interleave data of the non-systematic RS encoded mobile service data packets.