DIGITAL BROADCASTING SYSTEM AND METHOD OF PROCESSING DATA

• US 20140075490A1
• Filed: 09/04/2013
• Published: 03/13/2014
• 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, Choi, In Hwan, Kim, Jin Woo, Kim, Jong Moon, Song, Won Gyu, Lee, Hyoung Gon, Kwak, Kook Yeon
• Granted Patent: US 9,521,441 B2
• Time in Patent Office: Days
• US Class Current: 725/118
• 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. A digital broadcast transmitter comprising:

a first encoder configured to first encode broadcast service data;

a second encoder configured to second encode transmission parameter data;

an interleaver configured to interleave the encoded broadcast service data and the encoded transmission parameter data;

a third encoder configured to third encode the interleaved data; and

a transmitting unit configured to transmit the third encoded data,

wherein the third encoded data are transmitted through data groups and wherein the transmission parameter data include identification information for identifying a collection of the data groups.

2. The digital broadcast transmitter of claim 1, wherein the transmission parameter data further include encoding information.

3. The digital broadcast transmitter of claim 1, wherein the interleaver outputs the data groups including the interleaved data, each data group having first segments 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 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 an (N+k+i)th first segment, and wherein M, L, N, k and i are natural numbers, M≠

L.

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

5. The digital broadcast transmitter of claim 3, wherein at least two of the second known data sequences have a different number of data bytes.

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

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

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

first encoding broadcast service data;

second encoding transmission parameter data;

interleaving the encoded broadcast service data and the encoded transmission parameter data;

third encoding the interleaved data; and

transmitting the third encoded data,

wherein the third encoded data are transmitted through data groups and wherein the transmission parameter data include identification information for identifying a collection of the data groups.

9. The method of claim 8, wherein the transmission parameter data further includes encoding information.

10. The method of claim 8, wherein interleaving the encoded data outputs the data groups including the interleaved data, each data group having first segments 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 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 an (N+k+i)th first segment, and wherein M, L, N, k and i are natural numbers, M≠

L.

11. The method of claim 10, wherein all of the first known data sequences have the same number of data bytes.

12. The method of claim 10, wherein at least two of the second known data sequences have a different number of data bytes.

13. The method of claim 10, wherein at least two of the first known data sequences are spaced 16 segments apart.

14. The method of claim 10 wherein at least two of the second known data sequences are spaced 16 segments apart.