Digital broadcasting system and method of processing data

• US 8,396,051 B2
• Filed: 07/22/2011
• Issued: 03/12/2013
• Est. Priority Date: 12/20/2006
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Lee, Hyoung Gon, Choi, In Hwan, Kwak, Kook Yeon, Kim, Jong Moon, Song, Won Gyu, Kim, Byoung Gill, Kim, Jin Woo
• Primary Examiner(s): Pollack, Melvin H
• Application Number:
  US13/189,449
• Publication Number:
  US 20110280301A1
• Time in Patent Office: 599 Days
• Field of Search: 370/350
• US Class Current: 370/350
• CPC Class Codes: H04L 1/0042 Encoding specially adapted to other signal generation operation, e.g. in order to reduce transmit distortions, jitter, or to improve signal shape H04L1/0067 takes precedence
• CPC Class Codes: H04L 1/0057 Block codes H04L1/0061, H04L1/0064 take precedence
• CPC Class Codes: H04L 1/0059 Convolutional codes
• CPC Class Codes: H04L 1/0065 Serial concatenated codes
• CPC Class Codes: H04N 21/235 Processing of additional data, e.g. scrambling of additional data or processing content descriptors
• CPC Class Codes: H04N 21/2362 Generation or processing of Service Information [SI]
• 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 21/435 Processing of additional data, e.g. decrypting of additional data, reconstructing software from modules extracted from the transport stream
• 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

Abstract

A digital broadcasting system and method of processing data are disclosed. The digital broadcasting system includes a transmitting system and a receiving system. The transmitting system comprises a distributed transmission adapter and a plurality of transmitters each being operated as a slave of the distributed transmission adapter, and each sharing the same frequency and transmitting the same signals.

Claims

1. A method of processing broadcast data in a digital broadcast transmitter, the method comprising:

randomizing mobile service data in a first randomizer;

performing Reed-Solomon (RS) encoding and cyclic redundancy check (CRC) encoding on the randomized mobile service data in a first encoder;

converting bytes of the RS-CRC encoded mobile service data into bit units;

encoding each bit of the mobile service data at a first code rate or a second code rate other than the first code rate and outputting the encoded bits of the mobile service data in byte units;

mapping the encoded mobile service data inputted in byte units into a data group that has a plurality of regions;

adding known data sequences, signaling information, place holders for non-systematic RS parity data and place holders for moving picture experts group (MPEG) header data to the data group, wherein the encoded mobile service data at the first code rate are mapped into at least one region of the plurality of regions of the data group, and wherein the encoded mobile service data at the second code rate are mapped into at least another region of the plurality of regions of the data group;

deinterleaving data in the data group;

removing the place holders for the non-systematic RS parity data in the deinterleaved data group and replacing the place holders for the MPEG header data in the deinterleaved data group with the MPEG header data having a packet identifier (PID), thereby outputting mobile service data packets;

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

performing non-systematic RS encoding on the mobile service data packets having the randomized MPEG header data in a second encoder; and

performing convolutional byte interleaving on data in the non-systematic RS-encoded mobile service data packets.

2. The method of claim 1, wherein the first code rate is equal to 2 and the second code rate is equal to 4.

3. The method of claim 1, wherein the signaling information comprises information related to the data group.

4. A digital broadcast transmitter comprising:

a first randomizer for randomizing mobile service data;

a first encoder for performing Reed-Solomon (RS) encoding and cyclic redundancy check (CRC) encoding on the randomized mobile service data;

a block processor for converting bytes of the RS-CRC encoded mobile service data into bit units, encoding each bit of the mobile service data at a first code rate or a second code rate other than the first code rate and outputting the encoded bits of the mobile service data in byte units;

a group formatting unit for mapping the encoded mobile service data inputted in byte units into a data group that has a plurality of regions, and adding known data sequences, signaling information, place holders for non-systematic RS parity data and place holders for moving picture experts group (MPEG) header data to the data group, wherein the encoded mobile service data at the first code rate are mapped into at least one region of the plurality of regions of the data group, and wherein the encoded mobile service data at the second code rate are mapped into at least another region of the plurality of regions of the data group;

a deinterleaver for deinterleaving data in the data group;

a packet formatter for removing the place holders for the non-systematic RS parity data in the deinterleaved data group and replacing the place holders for the MPEG header data in the deinterleaved data group with the MPEG header data having a packet identifier (PID), thereby outputting mobile service data packets;

a second randomizer for randomizing the MPEG header data of the mobile service data packets;

a second encoder for performing non-systematic RS encoding on the mobile service data packets having the randomized MPEG header data; and

an interleaver for performing convolutional byte interleaving on data in the non-systematic RS-encoded mobile service data packets.

5. The digital broadcast transmitter of claim 4, wherein the first code rate is equal to 2 and the second code rate is equal to 4.

6. The digital broadcast transmitter of claim 4, wherein the signaling information comprises information related to the data group.