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DE19882141T1 - Adaptive Doppelfilter-Echolöschung - Google Patents

Adaptive Doppelfilter-Echolöschung

Info

Publication number
DE19882141T1
DE19882141T1 DE19882141T DE19882141T DE19882141T1 DE 19882141 T1 DE19882141 T1 DE 19882141T1 DE 19882141 T DE19882141 T DE 19882141T DE 19882141 T DE19882141 T DE 19882141T DE 19882141 T1 DE19882141 T1 DE 19882141T1
Authority
DE
Germany
Prior art keywords
echo cancellation
double filter
adaptive double
filter echo
adaptive
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.)
Granted
Application number
DE19882141T
Other languages
English (en)
Other versions
DE19882141B4 (de
Inventor
Stefan Hakansson
Claes Hammar
Toenu Trump
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.)
Telefonaktiebolaget LM Ericsson AB
Original Assignee
Telefonaktiebolaget LM Ericsson AB
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
Application filed by Telefonaktiebolaget LM Ericsson AB filed Critical Telefonaktiebolaget LM Ericsson AB
Publication of DE19882141T1 publication Critical patent/DE19882141T1/de
Application granted granted Critical
Publication of DE19882141B4 publication Critical patent/DE19882141B4/de
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B3/00—Line transmission systems
    • H04B3/02—Details
    • H04B3/20—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other
    • H04B3/23—Reducing echo effects or singing; Opening or closing transmitting path; Conditioning for transmission in one direction or the other using a replica of transmitted signal in the time domain, e.g. echo cancellers
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F15/00—Digital computers in general; Data processing equipment in general
    • G06F15/76—Architectures of general purpose stored program computers
    • G06F15/78—Architectures of general purpose stored program computers comprising a single central processing unit
    • G06F15/7807—System on chip, i.e. computer system on a single chip; System in package, i.e. computer system on one or more chips in a single package
    • G06F15/7817—Specially adapted for signal processing, e.g. Harvard architectures
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F17/00—Digital computing or data processing equipment or methods, specially adapted for specific functions
    • G06F17/10—Complex mathematical operations
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F7/00—Methods or arrangements for processing data by operating upon the order or content of the data handled
    • G06F7/38—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation
    • G06F7/48—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices
    • G06F7/544—Methods or arrangements for performing computations using exclusively denominational number representation, e.g. using binary, ternary, decimal representation using non-contact-making devices, e.g. tube, solid state device; using unspecified devices for evaluating functions by calculation
    • G06F7/5443—Sum of products

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • Computer Hardware Design (AREA)
  • Mathematical Physics (AREA)
  • Pure & Applied Mathematics (AREA)
  • Computing Systems (AREA)
  • Signal Processing (AREA)
  • Mathematical Optimization (AREA)
  • Computational Mathematics (AREA)
  • Data Mining & Analysis (AREA)
  • Mathematical Analysis (AREA)
  • Algebra (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Databases & Information Systems (AREA)
  • Software Systems (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Complex Calculations (AREA)
  • Filters That Use Time-Delay Elements (AREA)
DE19882141T 1997-02-28 1998-02-26 Adaptive Doppelfilter-Echolöschung Expired - Fee Related DE19882141B4 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US08/810,601 US5933797A (en) 1997-02-28 1997-02-28 Adaptive dual filter echo cancellation
US08/810,601 1997-02-28
PCT/SE1998/000349 WO1998038582A1 (en) 1997-02-28 1998-02-26 Adaptive dual filter echo cancellation

Publications (2)

Publication Number Publication Date
DE19882141T1 true DE19882141T1 (de) 2000-01-13
DE19882141B4 DE19882141B4 (de) 2009-01-02

Family

ID=25204205

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19882141T Expired - Fee Related DE19882141B4 (de) 1997-02-28 1998-02-26 Adaptive Doppelfilter-Echolöschung

Country Status (8)

Country Link
US (1) US5933797A (de)
JP (1) JP4445041B2 (de)
CN (1) CN1126049C (de)
AU (1) AU6642498A (de)
DE (1) DE19882141B4 (de)
GB (1) GB2341067B (de)
MY (1) MY122103A (de)
WO (1) WO1998038582A1 (de)

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2758677B1 (fr) * 1997-01-21 1999-04-02 Matra Communication Procede d'annulation d'echo et annuleur d'echo mettant en oeuvre un tel procede
US6279020B1 (en) * 1997-12-23 2001-08-21 U.S. Philips Corporation Programmable circuit for realizing a digital filter
EP0992885B1 (de) * 1998-10-06 2005-12-28 Texas Instruments Incorporated Multiplizier-Akkumulatorschaltungen
US6571268B1 (en) 1998-10-06 2003-05-27 Texas Instruments Incorporated Multiplier accumulator circuits
US6687373B1 (en) 1999-08-24 2004-02-03 Nortel Networks Limited Heusristics for optimum beta factor and filter order determination in echo canceler systems
US6557022B1 (en) * 2000-02-26 2003-04-29 Qualcomm, Incorporated Digital signal processor with coupled multiply-accumulate units
US6725360B1 (en) 2000-03-31 2004-04-20 Intel Corporation Selectively processing different size data in multiplier and ALU paths in parallel
US6714956B1 (en) * 2000-07-24 2004-03-30 Via Technologies, Inc. Hardware accelerator for normal least-mean-square algorithm-based coefficient adaptation
US7068780B1 (en) * 2000-08-30 2006-06-27 Conexant, Inc. Hybrid echo canceller
US7346012B2 (en) 2002-12-13 2008-03-18 Tioga Technologies Ltd. Transceiver with accelerated echo canceller convergence
US20040193668A1 (en) * 2003-03-31 2004-09-30 Patrick Devaney Virtual double width accumulators for vector processing
US7716712B2 (en) * 2003-06-18 2010-05-11 General Instrument Corporation Narrowband interference and identification and digital processing for cable television return path performance enhancement
US20060224652A1 (en) * 2005-04-05 2006-10-05 Nokia Corporation Instruction set processor enhancement for computing a fast fourier transform
GB2439988A (en) * 2005-06-01 2008-01-16 Tecteon Plc Subband coefficient adaptor for adaptive filter
CA2624629A1 (en) * 2005-10-31 2007-05-10 Telefonaktiebolaget L M Ericsson (Publ) Reduction of digital filter delay
US9185233B2 (en) * 2010-05-25 2015-11-10 Intel Deutschland Gmbh Audio communication device and method using fixed echo cancellation filter coefficients
DE102012220488A1 (de) * 2012-11-09 2014-05-15 Robert Bosch Gmbh Teilnehmerstation für ein Bussystem und Verfahren zur Verbesserung der Empfangsqualität von Nachrichten bei einer Teilnehmerstation eines Bussystems
CN113194378B (zh) * 2021-06-30 2021-11-26 深圳市汇顶科技股份有限公司 音频信号的降噪方法、音频信号处理装置及电子设备
EP4138406B1 (de) 2021-06-30 2023-12-27 Shenzhen Goodix Technology Co., Ltd. Verfahren zur audiosignalrauschunterdrückung, einrichtung zur audiosignalverarbeitung und elektronische vorrichtung

Family Cites Families (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1986002181A1 (en) * 1984-09-28 1986-04-10 Motorola, Inc. A digital signal processor for single cycle multiply/accumulation
NL8901247A (nl) * 1989-05-19 1990-12-17 Philips Nv Adaptief tijddiscreet transversaal filter.
US5388092A (en) * 1989-06-27 1995-02-07 Nec Corporation Echo canceller for two-wire full duplex digital data transmission
JPH0344218A (ja) * 1989-07-12 1991-02-26 Fujitsu Ltd 適応形エコーキャンセラ
JPH03159423A (ja) * 1989-11-17 1991-07-09 Fujitsu Ltd エコーキャンセラにおけるダブルトーク検出方式
US5001661A (en) * 1990-01-23 1991-03-19 Motorola, Inc. Data processor with combined adaptive LMS and general multiplication functions
JP2518433B2 (ja) * 1990-01-24 1996-07-24 日本電気株式会社 ダブルト―ク検出回路
JP3135902B2 (ja) * 1990-05-11 2001-02-19 株式会社日立製作所 自動等化器及び半導体集積回路
EP0466997A1 (de) * 1990-07-18 1992-01-22 International Business Machines Corporation Verbesserte digitale Signal-Verarbeitungsarchitektur
JPH04302522A (ja) * 1991-03-29 1992-10-26 Hitachi Ltd 演算回路及びこれを用いた適応フィルタ並びにエコーキャンセラ
US5278872A (en) * 1991-05-28 1994-01-11 North American Philips Corporation System and circuit architecture for echo cancellation and a television receiver comprising same
JP2792311B2 (ja) * 1992-01-31 1998-09-03 日本電気株式会社 多チャンネルエコー除去方法および装置
US5396517A (en) * 1993-03-04 1995-03-07 Adtran Transversal filter useable in echo canceler, decision feedback equalizer applications for minimizing non-linear distortion in signals conveyed over full duplex two-wire communication link
US5381357A (en) * 1993-05-28 1995-01-10 Grumman Corporation Complex adaptive fir filter
JPH07288493A (ja) * 1994-04-18 1995-10-31 Fujitsu Ltd ダブルトーク検出装置
US5652903A (en) * 1994-11-01 1997-07-29 Motorola, Inc. DSP co-processor for use on an integrated circuit that performs multiple communication tasks
US5631957A (en) * 1995-03-09 1997-05-20 National Semiconductor Corporation Band-energy near-end echo reducer for tonal signalling detectors
US5745396A (en) * 1995-04-28 1998-04-28 Lucent Technologies Inc. Pipelined adaptive IIR filter
US5721782A (en) * 1996-03-25 1998-02-24 Motorola, Inc. Partitioned echo canceler utilizing decimation echo location

Also Published As

Publication number Publication date
GB9920266D0 (en) 1999-10-27
GB2341067A (en) 2000-03-01
WO1998038582A1 (en) 1998-09-03
MY122103A (en) 2006-03-31
DE19882141B4 (de) 2009-01-02
JP4445041B2 (ja) 2010-04-07
JP2001513293A (ja) 2001-08-28
AU6642498A (en) 1998-09-18
CN1249829A (zh) 2000-04-05
US5933797A (en) 1999-08-03
CN1126049C (zh) 2003-10-29
GB2341067B (en) 2001-11-07

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Legal Events

Date Code Title Description
8180 Miscellaneous part 1

Free format text: DER ANMELDER IST ZU AENDERN IN: TELEFONAKTIEBOLAGET L M ERICSSON (PUBL), STOCKHOLM, SE

8110 Request for examination paragraph 44
8125 Change of the main classification

Ipc: H04L 2503

8364 No opposition during term of opposition
R119 Application deemed withdrawn, or ip right lapsed, due to non-payment of renewal fee