Digital broadcasting system and method of processing data

• US 8,532,222 B2
• Filed: 04/09/2012
• Issued: 09/10/2013
• Est. Priority Date: 03/30/2007
• Status: Expired due to Fees

• Current Assignee: LG Electronics, Inc. (LG Corporation)
• Original Assignee: LG Electronics, Inc. (LG Corporation)
• Inventors: Kim, Byoung Gill, Choi, In Hwan, Kim, Jin Woo, Kim, Jong Moon, Song, Won Gyu, Lee, Hyoung Gon, Kwak, Kook Yeon
• Primary Examiner(s): Washburn, Daniel
• Assistant Examiner(s): Guarino, Rahel
• Application Number:
  US13/442,810
• Publication Number:
  US 20120195394A1
• Time in Patent Office: 519 Days
• Field of Search: 375/260, 375/295, 375/296, 375/240.26, 375/240.28, 375/E7.013, 348/723, 348/21, 348/607, 348/608, 348/683, 348/E7.012, 348/E7.04, 348/E7.043, 348/E7.045, 348/E7.07, 348/E7.093
• US Class Current: 375/296
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 1/0045 Arrangements at the receiver end
• 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 1/0065 Serial concatenated codes
• CPC Class Codes: H04L 1/0071 Use of interleaving interleaving per se H03M13/27
• 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: H04N 21/236 Assembling of a multiplex stream, e.g. transport stream, by combining a video stream with other content or additional data, e.g. inserting a URL [Uniform Resource Locator] into a video stream, multiplexing software data into a video stream; Remultiplexing of multiplex streams; Insertion of stuffing bits into the multiplex stream, e.g. to obtain a constant bit-rate; Assembling of a packetised elementary stream multiplexing of data packets for data networks, e.g. RTP/UDP H04L65/00
• CPC Class Codes: H04N 21/238 Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams hybrid fiber coaxial [HFC] networks for downstream channel allocation for video distribution H04L12/2801; flow control in packet networks H04L47/10; real-time communication protocols in data switching networks H04L65/00; scheduling or organising the servicing of application requests H04L67/60
• CPC Class Codes: H04N 21/2389 Multiplex stream processing, e.g. multiplex stream encrypting

Abstract

A digital broadcast transmitter includes a block processor encoding mobile service data at a coding rate of 1/H and first interleaving the encoded mobile service data, wherein H is an integer equal to or greater than 2, a deinterleaver deinterleaving the first-interleaved mobile service data to output a first data group, an interleaver second interleaving the first data group to output a second data group including the mobile service data, a trellis encoding module trellis encoding data of the second data group, and a multiplexer multiplexing the trellis-encoded data with segment synchronization data and field synchronization data, wherein the block processor is concatenated with the trellis encoding module.

Claims

1. A digital broadcast transmitter, comprising:

a block processor configured to encode mobile service data at a coding rate of 1/H and to block interleave the encoded mobile service data, wherein H is an integer equal to or greater than 2;

a deinterleaver configured to deinterleave the block-interleaved mobile service data to output a first data group;

an interleaver configured to convolutional interleave data of the first data group to output a second data group including the mobile service data, wherein;

the second data group includes first segments and second segments,

the first segments have first known data sequences and the second segments have second known data sequences,

a number of data bytes for one of the first known data sequences is different from a number of data bytes for one of the second known data sequences,

M second segments are positioned between an Nth first segment and an (N+k)th first segment,

L second segments are positioned between the (N+k)th first segment and an (N+k+i)th first segment, and

M, L, N, k and i are natural numbers and M and L are not the same;

a trellis encoding module configured to trellis encode data of the second data group; and

a multiplexer configured to multiplex the trellis-encoded data with segment synchronization data and field synchronization data,

wherein the block processor is concatenated with the trellis encoding module.

2. The digital broadcast transmitter of claim 1, wherein:

the second data group further includes transmitter parameters, and

the transmission parameters include code mode information indicating the coding rate of 1/H.

3. The digital broadcast transmitter of claim 1, wherein all of the first known data sequences have a same number of data bytes.

4. The digital broadcast transmitter of claim 1, wherein at least two of the second known data sequences have different numbers of data bytes.

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

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

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

encoding, by a block processor, mobile service data at a coding rate of 1/H, wherein H is an integer equal to or greater than 2;

block interleaving, by the block processor, the encoded mobile service data;

deinterleaving, by a deinterleaver, the block-interleaved mobile service data to output a first data group;

convolutional interleaving, by an interleaver, the first data group to output a second data group including the mobile service data, wherein;

the second data group includes first segments and second segments,

the first segments have first known data sequences and the second segments have second known data sequences,

a number of data bytes for one of the first known data sequences is different from a number of data bytes for one of the second known data sequences,

M second segments are positioned between an Nth first segment and an (N+k)th first segment,

L second segments are positioned between the (N+k)th first segment and an (N+k+i)th first segment, and

M, L, N, k and i are natural numbers and M and L are not the same;

trellis encoding, by a trellis encoding module, data of the second data group; and

multiplexing, by a multiplexer, the trellis-encoded data with segment synchronization data and field synchronization data,

wherein the block processor is concatenated with the trellis encoding module.

8. The method of claim 7, wherein:

the second data group further includes transmitter parameters, and

the transmission parameters include code mode information indicating the coding rate of 1/H.

9. The method of claim 7, wherein all of the first known data sequences have a same number of data bytes.

10. The method of claim 7, wherein at least two of the second known data sequences have different numbers of data bytes.

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

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