GB2391776B - Improvements in decoders for many-carrier signals, in particular in DVB-T receivers - Google Patents

Improvements in decoders for many-carrier signals, in particular in DVB-T receivers

Info

Publication number
GB2391776B
GB2391776B GB0323574A GB0323574A GB2391776B GB 2391776 B GB2391776 B GB 2391776B GB 0323574 A GB0323574 A GB 0323574A GB 0323574 A GB0323574 A GB 0323574A GB 2391776 B GB2391776 B GB 2391776B
Authority
GB
United Kingdom
Prior art keywords
dvb
decoders
receivers
many
carrier signals
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
GB0323574A
Other versions
GB0323574D0 (en
GB2391776A (en
Inventor
Adrian Paul Robinson
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
British Broadcasting Corp
Original Assignee
British Broadcasting Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from GBGB0110907.3A external-priority patent/GB0110907D0/en
Application filed by British Broadcasting Corp filed Critical British Broadcasting Corp
Publication of GB0323574D0 publication Critical patent/GB0323574D0/en
Publication of GB2391776A publication Critical patent/GB2391776A/en
Application granted granted Critical
Publication of GB2391776B publication Critical patent/GB2391776B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/438—Interfacing the downstream path of the transmission network originating from a server, e.g. retrieving MPEG packets from an IP network
    • H04N21/4382—Demodulation or channel decoding, e.g. QPSK demodulation
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/03—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words
    • H03M13/05—Error detection or forward error correction by redundancy in data representation, i.e. code words containing more digits than the source words using block codes, i.e. a predetermined number of check bits joined to a predetermined number of information bits
    • H03M13/13—Linear codes
    • H03M13/15—Cyclic codes, i.e. cyclic shifts of codewords produce other codewords, e.g. codes defined by a generator polynomial, Bose-Chaudhuri-Hocquenghem [BCH] codes
    • H03M13/151—Cyclic codes, i.e. cyclic shifts of codewords produce other codewords, e.g. codes defined by a generator polynomial, Bose-Chaudhuri-Hocquenghem [BCH] codes using error location or error correction polynomials
    • H03M13/154—Error and erasure correction, e.g. by using the error and erasure locator or Forney polynomial
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/29—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes
    • H03M13/2906—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes using block codes
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
    • H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
    • H03M13/29—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes
    • H03M13/2933—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes combining two or more codes or code structures, e.g. product codes, generalised product codes, concatenated codes, inner and outer codes using a block and a convolutional code
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0045—Arrangements at the receiver end
    • H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0059—Convolutional codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0064—Concatenated codes
    • H04L1/0065—Serial concatenated codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/20—Arrangements for detecting or preventing errors in the information received using signal quality detector
    • H04L1/206—Arrangements for detecting or preventing errors in the information received using signal quality detector for modulated signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/06—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection
    • H04L25/067—Dc level restoring means; Bias distortion correction ; Decision circuits providing symbol by symbol detection providing soft decisions, i.e. decisions together with an estimate of reliability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2647—Arrangements specific to the receiver only
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—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
    • H04N21/2383—Channel coding or modulation of digital bit-stream, e.g. QPSK modulation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
    • H04L1/0056—Systems characterized by the type of code used
    • H04L1/0071—Use of interleaving
GB0323574A 2001-05-03 2002-05-01 Improvements in decoders for many-carrier signals, in particular in DVB-T receivers Expired - Fee Related GB2391776B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0110907.3A GB0110907D0 (en) 2001-05-03 2001-05-03 Improvements in decoders for many carrier signals, in particular in DVB-T recievers
GB0210016A GB2378364B (en) 2001-05-03 2002-05-01 Improvements in decoders for many-carrier signals, in particular in DVB-T receivers

Publications (3)

Publication Number Publication Date
GB0323574D0 GB0323574D0 (en) 2003-11-12
GB2391776A GB2391776A (en) 2004-02-11
GB2391776B true GB2391776B (en) 2004-04-14

Family

ID=30117078

Family Applications (2)

Application Number Title Priority Date Filing Date
GB0323574A Expired - Fee Related GB2391776B (en) 2001-05-03 2002-05-01 Improvements in decoders for many-carrier signals, in particular in DVB-T receivers
GB0323575A Expired - Fee Related GB2391777B (en) 2001-05-03 2002-05-01 Improvements in decoders for many-carrier signals, in particular in DVB-T receivers

Family Applications After (1)

Application Number Title Priority Date Filing Date
GB0323575A Expired - Fee Related GB2391777B (en) 2001-05-03 2002-05-01 Improvements in decoders for many-carrier signals, in particular in DVB-T receivers

Country Status (1)

Country Link
GB (2) GB2391776B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1569349A1 (en) * 2004-02-23 2005-08-31 Alcatel Alternative concatenated coding scheme for digital signals

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0844741A2 (en) * 1996-11-21 1998-05-27 Matsushita Electric Industrial Co., Ltd. Error correction device
WO1998058496A2 (en) * 1997-06-19 1998-12-23 Qualcomm Incorporated Transmission of digital signals by orthogonal frequency division multiplexing
GB2342546A (en) * 1998-10-01 2000-04-12 British Broadcasting Corp Measuring channel state from a received signal and discriminating digital values from a received signal, suitable for use in COFDM
WO2001008365A1 (en) * 1999-07-08 2001-02-01 Koninklijke Philips Electronics N.V. Receiver with optimal quantization and soft viterbi decoding
WO2001048927A1 (en) * 1999-12-24 2001-07-05 Ensemble Communications, Inc. Method and apparatus for concatenated channel coding

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0677937B1 (en) * 1994-04-14 2001-02-28 Alcatel Method for detecting erasures in a multicarrier data transmission system
GB2346520A (en) * 1998-11-09 2000-08-09 Wi Lan Inc Data recovery in an OFDM system exploiting pilot subcarriers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0844741A2 (en) * 1996-11-21 1998-05-27 Matsushita Electric Industrial Co., Ltd. Error correction device
WO1998058496A2 (en) * 1997-06-19 1998-12-23 Qualcomm Incorporated Transmission of digital signals by orthogonal frequency division multiplexing
GB2342546A (en) * 1998-10-01 2000-04-12 British Broadcasting Corp Measuring channel state from a received signal and discriminating digital values from a received signal, suitable for use in COFDM
WO2001008365A1 (en) * 1999-07-08 2001-02-01 Koninklijke Philips Electronics N.V. Receiver with optimal quantization and soft viterbi decoding
WO2001048927A1 (en) * 1999-12-24 2001-07-05 Ensemble Communications, Inc. Method and apparatus for concatenated channel coding

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Wim J. van Houtum, "Single Carrier Digital Terrestrial Television Broadcasting", IEEE Transactions on Broadcasting, Vol. 43, No. 4, Dec. 1997, pp 403-411. *

Also Published As

Publication number Publication date
GB2391777A (en) 2004-02-11
GB0323574D0 (en) 2003-11-12
GB2391777B (en) 2004-04-14
GB0323575D0 (en) 2003-11-12
GB2391776A (en) 2004-02-11

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 20140501