FI972778A0 - Alikaistoihin perustuva kaiunpoistaja, joka käyttää optimaalisia aaltopaketteja ja kaistojen välistä kaiunpoistoa - Google Patents

Alikaistoihin perustuva kaiunpoistaja, joka käyttää optimaalisia aaltopaketteja ja kaistojen välistä kaiunpoistoa

Info

Publication number
FI972778A0
FI972778A0 FI972778A FI972778A FI972778A0 FI 972778 A0 FI972778 A0 FI 972778A0 FI 972778 A FI972778 A FI 972778A FI 972778 A FI972778 A FI 972778A FI 972778 A0 FI972778 A0 FI 972778A0
Authority
FI
Finland
Prior art keywords
subband
cross
echo canceller
band attenuation
wave packets
Prior art date
Application number
FI972778A
Other languages
English (en)
Swedish (sv)
Other versions
FI972778A (fi
Inventor
Kon Max Wong
Qu Jin
Qiang Wu
Phillippe Wu
Gordon J Reesor
Original Assignee
Mitel 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
Application filed by Mitel Corp filed Critical Mitel Corp
Publication of FI972778A0 publication Critical patent/FI972778A0/fi
Publication of FI972778A publication Critical patent/FI972778A/fi

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/082—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using echo cancellers
    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0004—Modulated-carrier systems using wavelets

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Filters That Use Time-Delay Elements (AREA)
FI972778A 1996-06-28 1997-06-27 Alikaistoihin perustuva kaiunpoistaja, joka käyttää optimaalisia aaltopaketteja ja kaistojen välistä kaiunpoistoa FI972778A (fi)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US67186996A 1996-06-28 1996-06-28

Publications (2)

Publication Number Publication Date
FI972778A0 true FI972778A0 (fi) 1997-06-27
FI972778A FI972778A (fi) 1997-12-29

Family

ID=24696205

Family Applications (1)

Application Number Title Priority Date Filing Date
FI972778A FI972778A (fi) 1996-06-28 1997-06-27 Alikaistoihin perustuva kaiunpoistaja, joka käyttää optimaalisia aaltopaketteja ja kaistojen välistä kaiunpoistoa

Country Status (6)

Country Link
US (1) US5937009A (fi)
JP (1) JPH10164686A (fi)
CA (1) CA2208942C (fi)
FI (1) FI972778A (fi)
GB (1) GB2314749B (fi)
SE (1) SE9702451L (fi)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2344036B (en) * 1998-11-23 2004-01-21 Mitel Corp Single-sided subband filters
US6426977B1 (en) * 1999-06-04 2002-07-30 Atlantic Aerospace Electronics Corporation System and method for applying and removing Gaussian covering functions
US6792106B1 (en) 1999-09-17 2004-09-14 Agere Systems Inc. Echo canceller and method of echo cancellation using an NLMS algorithm
DE19954088C2 (de) * 1999-11-10 2002-01-17 Siemens Ag Verfahren zur Filterung einer digitalen Signalfolge
US6826279B1 (en) 2000-05-25 2004-11-30 3Com Corporation Base band echo cancellation using laguerre echo estimation
US6377637B1 (en) * 2000-07-12 2002-04-23 Andrea Electronics Corporation Sub-band exponential smoothing noise canceling system
US6738358B2 (en) * 2000-09-09 2004-05-18 Intel Corporation Network echo canceller for integrated telecommunications processing
GB2366976A (en) * 2000-09-19 2002-03-20 Central Research Lab Ltd A method of synthesising an approximate impulse response function
US6738479B1 (en) 2000-11-13 2004-05-18 Creative Technology Ltd. Method of audio signal processing for a loudspeaker located close to an ear
US6741711B1 (en) 2000-11-14 2004-05-25 Creative Technology Ltd. Method of synthesizing an approximate impulse response function
US7376688B1 (en) 2001-01-09 2008-05-20 Urbain A. von der Embse Wavelet multi-resolution waveforms
CN1716798B (zh) * 2004-07-02 2011-03-02 朗迅科技公司 通信网络中消除回波的方法
US8457614B2 (en) 2005-04-07 2013-06-04 Clearone Communications, Inc. Wireless multi-unit conference phone
GB2439988A (en) * 2005-06-01 2008-01-16 Tecteon Plc Subband coefficient adaptor for adaptive filter
US8155304B2 (en) * 2007-04-10 2012-04-10 Microsoft Corporation Filter bank optimization for acoustic echo cancellation
US8050398B1 (en) 2007-10-31 2011-11-01 Clearone Communications, Inc. Adaptive conferencing pod sidetone compensator connecting to a telephonic device having intermittent sidetone
US8199927B1 (en) 2007-10-31 2012-06-12 ClearOnce Communications, Inc. Conferencing system implementing echo cancellation and push-to-talk microphone detection using two-stage frequency filter
EP3800639B1 (en) 2015-03-27 2022-12-28 Dolby Laboratories Licensing Corporation Adaptive audio filtering

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2628918B1 (fr) * 1988-03-15 1990-08-10 France Etat Dispositif annuleur d'echo a filtrage en sous-bandes de frequence
JPH04123621A (ja) * 1990-09-14 1992-04-23 Nippon Telegr & Teleph Corp <Ntt> 反響消去装置
JP3336126B2 (ja) * 1994-09-05 2002-10-21 富士通株式会社 エコーキャンセラの波形歪み補償装置
US5566167A (en) * 1995-01-04 1996-10-15 Lucent Technologies Inc. Subband echo canceler
US5663955A (en) * 1995-08-25 1997-09-02 Lucent Technologies Inc. Echo canceller system with shared coefficient memory

Also Published As

Publication number Publication date
GB2314749B (en) 1999-10-27
GB9713522D0 (en) 1997-09-03
FI972778A (fi) 1997-12-29
SE9702451L (sv) 1997-12-29
SE9702451D0 (sv) 1997-06-26
US5937009A (en) 1999-08-10
GB2314749A (en) 1998-01-07
CA2208942A1 (en) 1997-12-28
JPH10164686A (ja) 1998-06-19
CA2208942C (en) 2001-05-01

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