Digital broadcasting system and method of processing data

• US 7,822,134 B2
• Filed: 07/06/2007
• Issued: 10/26/2010
• 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, Jong Moon, Kim, Byoung Gill, Lee, Hyoung Gon, Choi, In Hwan, Song, Won Gyu, Kwak, Kook Yeon, Kim, Jin Woo
• Primary Examiner(s): Bocure; Tesfaldet
• Assistant Examiner(s): Williams; Lawrence B
• Application Number:
  US11/774,551
• Publication Number:
  US 20080240293A1
• Time in Patent Office: 1,208 Days
• Field of Search: 375/240, 375/240.01, 375/240.18, 375/240.24, 375/260, 375/265, 375/321, 375/340, 375/341, 375/350, 375/229, 375/270, 375/295, 375/316, 375/346, 375/371, 370/485, 370/486, 370/487, 348/14.02, 348/21, 348/607, 348/723, 348725-726, 348/729, 348/E5.077, 386/46, 386 65- 66, 386/71, 386 84- 85, 386/88, 386/98, 717/55, 717/76, 71E/110.01
• US Class Current: 375/260
• 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 system and method of processing digital data is disclosed, including a digital broadcast transmitter and digital broadcast receiver and methods thereof.

Claims

1. A digital broadcast transmitter, comprising:

a pre-processor configured to pre-process mobile service data, the mobile service data being included in a first data group, wherein the pre-processor is further configured to de-interleave the first data group to output a second data group, the first data group having first and second segments, the first segments having first known data, the second segments having second known data, the number of data bytes for the first known data being different from the number of data bytes for the second known data, M second segments being positioned between an Nth first segment and an (N+k)th first segment, L second segments being positioned between the (N+k)th first segment and (N+k+i)th first segment, wherein M, L, N, k and i are natural numbers, M≠

L, and each packet in the second data group has a length of 207 bytes; and

a multiplexer configured to multiplex mobile service data packets having the mobile service data with main service data packets having main service data.

2. A digital broadcast receiver, comprising:

a tuner configured to receive a DTV signal comprising main service data and mobile service data multiplexed with the main service data, wherein the DTV signal results from generating a second data group by de-interleaving a first data group by a DTV transmitter, the first data group having first and second segments, the first segments having first known data, the second segments having second known data, the number of data bytes for the first data being different from the number of data bytes for the second data, M second segments being positioned between an Nth first segment and an (N+k)th first segment, L second segments being positioned between the (N+k)th first segment and (N+k+i)th first segment, wherein M, L, N, k and i are natural numbers, M≠

L, and each packet in the second data group has a length of 207 bytes;

a demodulator configured to demodulate the DTV signal; and

a decoder configured to decode the demodulated DTV signal.

3. A method of processing a DTV signal in a digital broadcast transmitter, comprising:

pre-processing mobile service data, the mobile service data being included in a first data group, wherein a second data group is generated from de-interleaving the first data group, the first data group having first and second segments, the first segments having first known data, the second segments having second known data, the number of data bytes for the first known data being different from the number of data bytes for the second known data, M second segments being positioned between an Nth first segment and an (N+k)th first segment, L second segments being positioned between the (N+k)th first segment and (N+k+i)th first segment, wherein M, L, N, k and i are natural numbers, M#L, and each packet in the second data group has a length of 207 bytes; and

multiplexing mobile service data packets having the mobile service data with main service data packets having main service data.

4. A method of processing a DTV signal in a digital broadcast receiver, comprising:

receiving a DTV signal comprising main service data and mobile service data multiplexed with the main service data, wherein the DTV signal results from generating a second data group by de-interleaving a first data group by a DTV transmitter, the first data group having first and second segments, the first segments having first known data, the second segments having second known data, the number of data bytes for the first known data being different from the number of data bytes for the second known data, M second segments being positioned between an Nth first segment and an (N+k)th first segment, L second segments being positioned between the (N+k)th first segment and (N+k+i)th first segment, wherein M, L, N, k and i are natural numbers, M≠

L, and each packet in the second data group has a length of 207 bytes;

demodulating the DTV signal; and

decoding the demodulated DTV signal.