Channel equalizer and method of processing broadcast signal in DTV receiving system

• US 8,526,508 B2
• Filed: 12/18/2012
• Issued: 09/03/2013
• Est. Priority Date: 02/10/2006
• 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, Kang, Kyung Won, Kwak, Kook Yeon, Kim, Woo Chan
• Primary Examiner(s): Washburn, Daniel
• Assistant Examiner(s): HUGHES, EBONI N
• Application Number:
  US13/718,738
• Publication Number:
  US 20130107972A1
• Time in Patent Office: 259 Days
• Field of Search: 375/229, 375/231, 375/232, 375/240.01, 375/240.18, 37524025-24027, 348607-614, 348/723
• US Class Current: 375/240.27
• CPC Class Codes: H03M 13/2792 Interleaver wherein interleaving is performed jointly with another technique such as puncturing, multiplexing or routing
• CPC Class Codes: H03M 13/2906 using block codes H03M13/2957 takes precedence
• CPC Class Codes: H03M 13/2936 comprising an outer Reed-Solomon code and an inner convolutional code
• CPC Class Codes: H03M 13/6538 ATSC VBS systems
• CPC Class Codes: H04L 1/0041 Arrangements at the transmitter end
• CPC Class Codes: H04L 12/189 in combination with wireless systems selective distribution or broadcast in wireless communication networks H04W4/06
• CPC Class Codes: H04L 25/0212 of impulse response
• 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 19/89 involving methods or arrangements for detection of transmission errors at the decoder
• CPC Class Codes: H04N 19/895 in combination with error concealment
• 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 21/23614 Multiplexing of additional data and video streams arrangements for simultaneous broadcast of plural pieces of information H04H20/28
• CPC Class Codes: H04N 21/631 Multimode Transmission, e.g. transmitting basic layers and enhancement layers of the content over different transmission paths or transmitting with different error corrections, different keys or with different transmission protocols
• CPC Class Codes: H04N 5/21 Circuitry for suppressing or minimising disturbance, e.g. moiré or halo
• CPC Class Codes: H04N 5/38 Transmitter circuitry for the transmission of television signals according to analogue transmission standards H04N5/14 takes precedence
• CPC Class Codes: H04N 5/40 Modulation circuits
• CPC Class Codes: H04N 5/455 Demodulation-circuits
• CPC Class Codes: H04N 7/12 Systems in which the television signal is transmitted via one channel or a plurality of parallel channels, the bandwidth of each channel being less than the bandwidth of the television signal H04N7/24 takes precedence

Abstract

A method of processing broadcast data in a transmitting system includes randomizing enhanced data; Reed-Solomon (RS) encoding and Cyclic Redundancy Check encoding the randomized enhanced data to build an RS frame; encoding the enhanced data in the built RS frame at a coding rate of at least ½ or ¼; first interleaving the encoded enhanced data; deinterleaving the first interleaved enhanced data; first multiplexing enhanced data packets including the deinterleaved enhanced data with main data packets including main data; randomizing the main data in the multiplexed enhanced and main data packets; second interleaving the enhanced data in the multiplexed enhanced and main data packets and the randomized main data to output a data group having the interleaved enhanced data and the interleaved main data; trellis encoding data in the data group in a trellis encoding unit; and second multiplexing the trellis-encoded data with field synchronization data and segment synchronization data.

Claims

1. A method of processing broadcast data in a broadcast transmitting system, the method comprising:

randomizing enhanced data;

Reed-Solomon (RS) encoding and Cyclic Redundancy Check (CRC) encoding the randomized enhanced data to build an RS frame;

encoding the enhanced data in the built RS frame at a coding rate of at least ½

or ¼

;

first interleaving the encoded enhanced data;

deinterleaving the first interleaved enhanced data;

first multiplexing enhanced data packets including the deinterleaved enhanced data with main data packets including main data;

randomizing the main data in the multiplexed enhanced and main data packets;

second interleaving the enhanced data in the multiplexed enhanced and main data packets and the randomized main data to output a data group having the interleaved enhanced data and the interleaved main data;

trellis encoding data in the data group in a trellis encoding unit; and

second multiplexing the trellis-encoded data with field synchronization data and segment synchronization data,

wherein the data group includes first segments, second segments and third segments, the second segments being positioned between the first and third segments, the first segments having enhanced data and main data, the second segments having enhanced data and a plurality of known data sequences, and the third segments having enhanced data and main data, and

wherein the enhanced data in the first, second and third segments are encoded by a non-systematic RS encoding scheme, the main data in the first and third segments are encoded by a systematic RS encoding scheme, and at least two of the plurality of known data sequences have different patterns.

2. The method of claim 1, wherein the RS frame comprises (187×

N) bytes including the randomized enhanced data, P bytes of RS parity data added at each column of the (187×

N) bytes and 2 bytes of CRC data added at each row of the ((187+P)×

N) bytes, wherein both P and N are greater than 1.

3. The method of claim 1, wherein the first interleaving comprises performing block interleaving on the encoded enhanced data and wherein the second interleaving comprises performing convolutional interleaving on the enhanced data in the multiplexed enhanced and main data packets and the randomized main data.

4. The method of claim 1, further comprising:

initializing at least one memory in the trellis encoding unit at each start of the plurality of known data sequences.

5. A broadcast transmitting system comprising:

a first randomizer configured to randomize enhanced data;

a Reed-Solomon (RS) frame encoder configured to RS encode and Cyclic Redundancy Check (CRC) encode the randomized enhanced data to build an RS frame;

a block processor configured to encode the enhanced data in the built RS frame at a coding rate of at least ½

or ¼ and

to first interleave the encoded enhanced data;

a deinterleaver configured to deinterleave the first interleaved enhanced data;

a first multiplexer configured to first multiplex enhanced data packets including the deinterleaved enhanced data with main data packets including main data;

a second randomizer configured to randomize the main data in the multiplexed enhanced and main data packets;

an interleaver configured to second interleave the enhanced data in the multiplexed enhanced and main data packets and the randomized main data to output a data group having the interleaved enhanced data and the interleaved main data;

a trellis encoding unit configured to trellis encode data in the data group; and

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

wherein the data group includes first segments, second segments and third segments, the second segments being positioned between the first and third segments, the first segments having enhanced data and main data, the second segments having enhanced data and a plurality of known data sequences, and the third segments having enhanced data and main data, and

wherein the enhanced data in the first, second and third segments are encoded by a non-systematic RS encoding scheme, the main data in the first and third segments are encoded by a systematic RS encoding scheme, and at least two of the plurality of known data sequences have different patterns.

6. The broadcast transmitting system of claim 5, wherein the RS frame comprises (187×

N) bytes including the randomized enhanced data, P bytes of RS parity data added at each column of the (187×

N) bytes and 2 bytes of CRC data added at each row of the ((187+P)×

N) bytes, wherein both P and N are greater than 1.

7. The broadcast transmitting system of claim 5, wherein the block processor is further configured to performs block interleaving on the encoded enhanced data and the interleaver is further configured to perform convolutional interleaving on the enhanced data in the multiplexed enhanced and main data packets and the randomized main data.

8. The broadcast transmitting system of claim 7, wherein at least one memory in the trellis encoding unit is initialized at each start of the plurality of known data sequences.