Digital broadcasting system and method of processing data

• US 8,023,047 B2
• Filed: 12/10/2010
• Issued: 09/20/2011
• 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, Byoung Gill, Lee, Hyoung Gon, Choi, In Hwan, Kim, Jong Moon, Song, Won Gyu, Kwak, Kook Yeon, Kim, Jin Woo
• Primary Examiner(s): Bocure; Tesfaldet
• Assistant Examiner(s): Williams; Lawrence
• Application Number:
  US12/965,754
• Publication Number:
  US 20110075766A1
• Time in Patent Office: 284 Days
• Field of Search: 375/270, 375/277, 375/301, 375/316, 375/321, 375/326, 375/340, 375/341, 329/300, 329/302, 329/304, 329/306, 329/315, 329/323, 348725-726, 714751-753, 714/775, 714/781, 714/784
• US Class Current: 348/726
• 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 13/2792 Interleaver wherein interleaving is performed jointly with another technique such as puncturing, multiplexing or routing
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04L 2027/003 at baseband only
• CPC Class Codes: H04L 27/0014 Carrier regulation of chaotic carriers H04L27/001; for multicarrier receivers H04L27/2657
• CPC Class Codes: H04L 7/0029 interpolation of received data signal
• CPC Class Codes: H04L 7/042 Detectors therefor, e.g. correlators, state machines digital correlators in general G06F17/15
• 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 21/4382 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: H04W 4/06 Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services

Abstract

A digital broadcast receiver is presented. The digital broadcast receiver includes a tuner for receiving a DTV signal, a known data detector for detecting position information of the known data sequences from the DTV signal, an equalizer for compensating a channel distortion of the DTV signal according to at least one of the detected position information of the known data sequences, a first decoder for turbo-decoding, via a block unit, mobile service data in the channel distortion compensated DTV signal, and a second decoder for generating a Reed-Solomon (RS) frame including the turbo-decoded mobile service data and for correcting at least one error of the generated RS frame by performing cyclic redundancy check (CRC) decoding and RS decoding on the generated RS frame.

Claims

1. A digital broadcast receiver, the digital broadcast receiver comprising:

a tuner for receiving a DTV signal, the DTV signal comprising;

a first data group comprising a first region including mobile service data, and a second region including mobile service data and known data sequences, wherein the first data group is generated by interleaving a second data group in a digital broadcast transmitter,

an Nth segment in the first region comprising K mobile service data bytes,

an (N+1)th segment in the first region comprising L mobile service data bytes,

an (N+2)th segment in the first region comprising M mobile service data bytes,

an Oth segment in the second region comprising X mobile service data bytes,

an (O+1)th segment in the second region comprising Y mobile service data bytes, and

an (O+2)th segment in the second region comprising Z mobile service data bytes, wherein the variables K, L, M, N, O, X, Y, Z are integers greater than 0, K<

L<

M, X=Y=Z, and N<

O;

a known data detector for detecting position information of the known data sequences from the DTV signal;

an equalizer for compensating a channel distortion of the DTV signal according to at least one of the detected position information of the known data sequences;

a first decoder for decoding, via a block unit, mobile service data in the channel distortion compensated DTV signal; and

a second decoder for generating a Reed-Solomon (RS) frame including the decoding mobile service data and for correcting at least one error of the generated RS frame by performing cyclic redundancy check (CRC) decoding and RS decoding on the generated RS frame.

2. The digital broadcast receiver of claim 1, wherein the generated RS frame comprises:

an RS frame payload including the decoded mobile service data;

RS parity data added at bottom ends of columns of the RS frame payload; and

CRC data added at right ends of rows of the RS frame payload including the RS parity data.

3. The digital broadcast receiver of claim 1, wherein at least two of the known data sequences are spaced 16 segments apart.

4. The digital broadcast receiver of claim 1, wherein at least two of the known data sequences differ from each other in length.

5. A method of processing broadcast data in a digital broadcast receiver, the method comprising:

receiving, by a tuner, a DTV signal, the DTV signal comprising;

a first data group comprising a first region and a second region, the first region including mobile service data, and the second region including mobile service data and known data sequences, wherein the first data group is generated by interleaving a second data group in a digital broadcast transmitter,

an Nth segment in the first region comprising K mobile service data bytes,

an (N+1)th segment in the first region comprising L mobile service data bytes,

an (N+2)th segment in the first region comprising M mobile service data bytes,

an Oth segment in the second region comprising X mobile service data bytes,

an (O+1)th segment in the second region comprising Y mobile service data bytes, and

an (O+2)th segment in the second region comprising Z mobile service data bytes, wherein the variables K, L, M, N , O, X, Y, Z are integers greater than 0, K<

L<

M, X=Y=Z, and N<

O;

detecting, by a known data detector, position information of the known data sequences from the DTV signal;

compensating, by an equalizer, a channel distortion of the DTV signal according to at least one of the detected position information of the known data sequences;

decoding, by a first decoder, mobile service data in the channel distortion compensated DTV signal; and

generating, by a second decoder, a Reed-Solomon (RS) frame including the decoded mobile service data and correcting at least one error of the generated RS frame by performing cyclic redundancy check (CRC) decoding and RS decoding on the generated RS frame.

6. The method of claim 5, wherein the generated RS frame comprises:

an RS frame payload including the decoded mobile service data;

RS parity data added at bottom ends of columns of the RS frame payload; and

CRC data added at right ends of rows of the RS frame payload including the RS parity data.

7. The method of claim 5, wherein at least two of the known data sequences are spaced 16 segments apart.

8. The method of claim 5, wherein at least two of the known data sequences differ from each other in length.