CA1204238A - Digital echo canceller for cancelling an echo signal in a frequency divisional manner - Google Patents

Digital echo canceller for cancelling an echo signal in a frequency divisional manner

Info

Publication number
CA1204238A
CA1204238A CA000437961A CA437961A CA1204238A CA 1204238 A CA1204238 A CA 1204238A CA 000437961 A CA000437961 A CA 000437961A CA 437961 A CA437961 A CA 437961A CA 1204238 A CA1204238 A CA 1204238A
Authority
CA
Canada
Prior art keywords
signal
component
send
digital
echo
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
Application number
CA000437961A
Other languages
English (en)
French (fr)
Inventor
Yasuo Itoh
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.)
NEC Corp
Original Assignee
NEC 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 NEC Corp filed Critical NEC Corp
Application granted granted Critical
Publication of CA1204238A publication Critical patent/CA1204238A/en
Expired 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Interconnected Communication Systems, Intercoms, And Interphones (AREA)
CA000437961A 1982-09-30 1983-09-29 Digital echo canceller for cancelling an echo signal in a frequency divisional manner Expired CA1204238A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP57171681A JPS5961321A (ja) 1982-09-30 1982-09-30 エコ−信号抑圧装置
JP171681/82 1982-09-30

Publications (1)

Publication Number Publication Date
CA1204238A true CA1204238A (en) 1986-05-06

Family

ID=15927719

Family Applications (1)

Application Number Title Priority Date Filing Date
CA000437961A Expired CA1204238A (en) 1982-09-30 1983-09-29 Digital echo canceller for cancelling an echo signal in a frequency divisional manner

Country Status (3)

Country Link
US (1) US4591670A (enExample)
JP (1) JPS5961321A (enExample)
CA (1) CA1204238A (enExample)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4747132A (en) * 1984-04-09 1988-05-24 Matsushita Electric Industrial Co., Ltd. Howling canceller
US5365583A (en) * 1992-07-02 1994-11-15 Polycom, Inc. Method for fail-safe operation in a speaker phone system
US5668794A (en) * 1995-09-29 1997-09-16 Crystal Semiconductor Variable gain echo suppressor
EP0880598A4 (en) * 1996-01-23 2005-02-23 Affymetrix Inc RAPID EVALUATION OF NUCLEIC ACID ABUNDANCE DIFFERENCE, WITH A HIGH-DENSITY OLIGONUCLEOTIDE SYSTEM
US6442275B1 (en) 1998-09-17 2002-08-27 Lucent Technologies Inc. Echo canceler including subband echo suppressor
US7164659B2 (en) * 1999-12-09 2007-01-16 Broadcom Corporation Adaptive gain control based on echo canceller performance information
DE10030123A1 (de) * 2000-06-20 2002-01-03 Infineon Technologies Ag Schaltungsanordnung zur analogen Echounterdrückung
US8457614B2 (en) * 2005-04-07 2013-06-04 Clearone Communications, Inc. Wireless multi-unit conference phone
JP4692291B2 (ja) * 2006-01-13 2011-06-01 沖電気工業株式会社 エコーキャンセラ
EP1850573A1 (fr) * 2006-04-28 2007-10-31 France Télécom Procede de reduction d'echo d'un signal audio large bande
US8923509B2 (en) * 2007-10-23 2014-12-30 Cisco Technology, Inc. Controlling echo in a wideband voice conference
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
US8050398B1 (en) 2007-10-31 2011-11-01 Clearone Communications, Inc. Adaptive conferencing pod sidetone compensator connecting to a telephonic device having intermittent sidetone
CN103873019A (zh) * 2012-12-13 2014-06-18 北京普源精电科技有限公司 一种射频信号源
US9491306B2 (en) * 2013-05-24 2016-11-08 Broadcom Corporation Signal processing control in an audio device
CN107886965B (zh) * 2017-11-28 2021-04-20 游密科技(深圳)有限公司 游戏背景音的回声消除方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1816153B2 (de) * 1968-12-20 1971-04-15 Schaltungsanordnung zur echounterdrueckung in einem sprech kreis auf einem vierdraht uebertragungssystem bei einem uebergang auf einen zweidrahtuebertragungsweg
US3784747A (en) * 1971-12-03 1974-01-08 Bell Telephone Labor Inc Speech suppression by predictive filtering
FR2412210A1 (fr) * 1977-12-14 1979-07-13 Cit Alcatel Poste telephonique a haut-parleur
NL7903759A (nl) * 1979-05-14 1980-11-18 Philips Nv Echocompensator met hoogdoorlaatfilter.

Also Published As

Publication number Publication date
JPS6340052B2 (enExample) 1988-08-09
JPS5961321A (ja) 1984-04-07
US4591670A (en) 1986-05-27

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Legal Events

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