DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA

• US 20110007223A1
• Filed: 09/21/2010
• Published: 01/13/2011
• Est. Priority Date: 03/30/2007
• Status: Active Grant

• 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
• Granted Patent: US 8,213,544 B2
• Time in Patent Office: Days
• US Class Current: 348/726
• 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 data are disclosed. A channel equalizer includes a frequency domain converter receiving a known data sequence, when the known data sequence is periodically inserted and transmitted in general data, and converting the received data to frequency domain data, a CIR estimator using the data being received during a known data section and known data generated by a receiving system, so as to estimate a CIR, a CIR calculator interpolating or extrapolating the CIR estimated by the CIR estimator in accordance with characteristics of the general data being received, a coefficient calculator converting the CIR being outputted from the CIR calculator to a frequency domain CIR and calculating and outputting an equalization coefficient, and a distortion compensator multiplying the equalization coefficient calculated by the coefficient calculator with the data converted to frequency domain data by the frequency domain converter, thereby compensating channel distortion.

Claims

1-22. -22. (canceled)

23. A digital broadcast receiver, comprising:

a tuner configured to receive a digital television (DTV) signal comprising a first data group that includes mobile service data, wherein the DTV signal is processed by generating the first data group by interleaving a second data group by a DTV transmitter, the first data group having first and second segments, the first segments having first known data sequences, the second segments having second known data sequences, a number of data bytes for one of the first known data sequences being different from a number of data bytes for one of the second known data sequences, M second segment being positioned between Nth first segment and (N+k)th first segment, and L second segment 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, and M≠

L;

a demodulator configured to demodulate the DTV signal; and

a decoder configured to decode the demodulated DTV signal.

24. The digital broadcast receiver of claim 23, wherein all of the first known data sequences have the same number of data bytes.

25. The digital broadcast receiver of claim 23, wherein at least two of the second known data sequences have different numbers of data bytes.

26. The digital broadcast receiver of claim 23, wherein at least two of the first known data sequences are spaced 16 segments apart.

27. The digital broadcast receiver of claim 23, wherein at least two of the second known data sequences are spaced 16 segments apart.

28. The digital broadcast receiver of claim 23, wherein the received DTV signal further comprises segment synchronization data and field synchronization data.

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

receiving the DTV signal comprising a first data group that includes mobile service data, wherein the DTV signal is processed by generating the first data group by interleaving a second data group by a DTV transmitter, the first data group having first and second segments, the first segments having first known data sequences, the second segments having second known data sequences, a number of data bytes for one of the first known data sequences being different from a number of data bytes for one of the second known data sequences, M second segment being positioned between Nth first segment and (N+k)th first segment, and L second segment 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, and M≠

L;

demodulating the DTV signal; and

decoding the demodulated DTV signal.

30. The method of claim 29, wherein all of the first known data sequences have the same number of data bytes.

31. The method of claim 29, wherein at least two of the second known data sequences have different numbers of data bytes.

32. The method of claim 29, wherein at least two of the first known data sequences are spaced 16 segments apart.

33. The method of claim 29, wherein at least two of the second known data sequences are spaced 16 segments apart.

34. The method of claim 29, wherein the received DTV signal further comprises segment synchronization data and field synchronization data.