JPS5760741A - Echo erasing device - Google Patents

Echo erasing device

Info

Publication number
JPS5760741A
JPS5760741A JP55134009A JP13400980A JPS5760741A JP S5760741 A JPS5760741 A JP S5760741A JP 55134009 A JP55134009 A JP 55134009A JP 13400980 A JP13400980 A JP 13400980A JP S5760741 A JPS5760741 A JP S5760741A
Authority
JP
Japan
Prior art keywords
signal
circuit
echo
receiving
transmission
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
JP55134009A
Other languages
English (en)
Other versions
JPS6046899B2 (ja
Inventor
Hidenori Ito
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
Nippon Electric Co Ltd
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=15118239&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=JPS5760741(A) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP55134009A priority Critical patent/JPS6046899B2/ja
Priority to US06/304,497 priority patent/US4527020A/en
Priority to EP81107650A priority patent/EP0048979B2/en
Priority to CA000386719A priority patent/CA1178731A/en
Priority to DE8181107650T priority patent/DE3174473D1/de
Publication of JPS5760741A publication Critical patent/JPS5760741A/ja
Publication of JPS6046899B2 publication Critical patent/JPS6046899B2/ja
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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
JP55134009A 1980-09-26 1980-09-26 反響消去装置 Expired JPS6046899B2 (ja)

Priority Applications (5)

Application Number Priority Date Filing Date Title
JP55134009A JPS6046899B2 (ja) 1980-09-26 1980-09-26 反響消去装置
US06/304,497 US4527020A (en) 1980-09-26 1981-09-22 Echo canceller for a long-distance telephone network
EP81107650A EP0048979B2 (en) 1980-09-26 1981-09-25 Echo canceller for a long-distance telephone network
CA000386719A CA1178731A (en) 1980-09-26 1981-09-25 Echo canceller for a long-distance telephone network
DE8181107650T DE3174473D1 (en) 1980-09-26 1981-09-25 Echo canceller for a long-distance telephone network

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55134009A JPS6046899B2 (ja) 1980-09-26 1980-09-26 反響消去装置

Publications (2)

Publication Number Publication Date
JPS5760741A true JPS5760741A (en) 1982-04-12
JPS6046899B2 JPS6046899B2 (ja) 1985-10-18

Family

ID=15118239

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55134009A Expired JPS6046899B2 (ja) 1980-09-26 1980-09-26 反響消去装置

Country Status (5)

Country Link
US (1) US4527020A (ja)
EP (1) EP0048979B2 (ja)
JP (1) JPS6046899B2 (ja)
CA (1) CA1178731A (ja)
DE (1) DE3174473D1 (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH027710A (ja) * 1988-02-04 1990-01-11 American Teleph & Telegr Co <Att> 横フィルタ

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8102225A (nl) * 1981-05-07 1982-12-01 Philips Nv Inrichting voor het compenseren van echosignalen.
US4411006A (en) * 1981-09-09 1983-10-18 Communication Satellite Corporation Digital bit rate synchronizer for digital echo cancellers and similar signal processing devices
EP0122594A3 (en) * 1983-04-18 1986-09-10 International Standard Electric Corporation Line circuit with echo compensation
EP0137323B1 (de) * 1983-10-06 1989-03-29 Studer Revox Ag Verfahren und Vorrichtung zur Umsetzung einer Eingangsabtastfolge in eine Ausgangsabtastfolge
DE3586696T2 (de) * 1984-05-30 1993-04-01 Hitachi Ltd Pcm-coder/decoder mit zweidraht/vierdrahtumwandlung.
NZ214905A (en) * 1985-01-29 1988-09-29 British Telecomm Noise cancellation by adaptive filter compensates for timing variations
DE3576772D1 (de) * 1985-04-30 1990-04-26 Ibm Verfahren und vorrichtung zur echoannullierung in einem uebertragungsnetzwerk.
JPH0720070B2 (ja) * 1985-08-14 1995-03-06 株式会社日立製作所 デイジタル平衡回路を有するｐｃｍ符号復号器
NL8600815A (nl) * 1986-03-28 1987-10-16 At & T & Philips Telecomm Inrichting voor het kompenseren van niet-lineaire vervorming in een te digitaliseren ingangssignaal en een echokompensatiestelsel voorzien van een dergelijke inrichting.
NO180137C (no) * 1986-11-17 1997-02-19 Alcatel Nv Ekkokansellerings-anlegg
FR2614484B1 (fr) * 1986-12-30 1994-04-08 Telecommunications Sa Terminal de transmission de donnees sur une voie analogique bidirectionnelle avec annulation d'echo couplee au rythme reception
WO1989007370A1 (en) * 1988-02-01 1989-08-10 Concord Data Systems, Inc. Far end echo cancellation method and apparatus
US4995030A (en) * 1988-02-01 1991-02-19 Memotec Datacom, Inc. Far end echo cancellation method and apparatus
JPH0624399B2 (ja) * 1988-03-22 1994-03-30 富士通株式会社 受信信号処理方式
JP2520770B2 (ja) * 1990-07-06 1996-07-31 富士通株式会社 ハイブリッド回路
JPH05122106A (ja) * 1991-05-22 1993-05-18 Hitachi Ltd 半導体集積回路装置
US5475628A (en) * 1992-09-30 1995-12-12 Analog Devices, Inc. Asynchronous digital sample rate converter
US5638010A (en) * 1995-06-07 1997-06-10 Analog Devices, Inc. Digitally controlled oscillator for a phase-locked loop providing a residue signal for use in continuously variable interpolation and decimation filters
KR100240626B1 (ko) * 1997-11-25 2000-01-15 정선종 디지털 이동 통신 시스템에서의 반향 제거 방법 및 장치
US20020021693A1 (en) * 1998-05-01 2002-02-21 At&T Corp. Sharing of voice-switched network and internet resources for intelligent session processing
US6563802B2 (en) * 1998-06-22 2003-05-13 Intel Corporation Echo cancellation with dynamic latency adjustment
US6647022B1 (en) * 1998-08-07 2003-11-11 Lucent Technologies Inc. Interference canceller
US7839758B1 (en) * 2008-09-23 2010-11-23 Net Logic Microsystems, Inc. Analog echo canceller with interpolating output
CN112235693B (zh) * 2020-11-04 2021-12-21 北京声智科技有限公司 麦克风信号处理方法、装置、设备及计算机可读存储介质

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4020332A (en) * 1975-09-24 1977-04-26 Bell Telephone Laboratories, Incorporated Interpolation-decimation circuit for increasing or decreasing digital sampling frequency
US4064379A (en) * 1976-06-11 1977-12-20 Communications Satellite Corporation Logarithmic echo canceller
NL170688C (nl) * 1976-06-28 1982-12-01 Philips Nv Inrichting voor simultane tweerichtingsdatatransmissie over tweedraadsverbindingen.
US4205575A (en) * 1978-05-19 1980-06-03 The Wurlitzer Company Binary interpolator for electronic musical instrument
NL7902053A (nl) * 1979-03-15 1980-09-17 Philips Nv Echocompensator voor homochrone data overdrachtssyste- men.
FR2469044A1 (fr) * 1979-08-30 1981-05-08 Thomson Csf Mat Tel Procede de traitement en temps partage de signaux numeriques et application a un annuleur d'echo autoadaptatif multiplexe
IT1119943B (it) * 1979-11-05 1986-03-19 Cselt Centro Studi Lab Telecom Ricevitore di segnali mutlifrequenza di tastiera codificati in pcm
US4270026A (en) * 1979-11-28 1981-05-26 International Telephone And Telegraph Corporation Interpolator apparatus for increasing the word rate of a digital signal of the type employed in digital telephone systems
JPS56166647A (en) * 1980-05-27 1981-12-21 Nec Corp Echo canceler
CA1137240A (en) * 1980-09-09 1982-12-07 Northern Telecom Limited Method of and apparatus for echo detection in voice channel signals
US4411006A (en) * 1981-09-09 1983-10-18 Communication Satellite Corporation Digital bit rate synchronizer for digital echo cancellers and similar signal processing devices

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH027710A (ja) * 1988-02-04 1990-01-11 American Teleph & Telegr Co <Att> 横フィルタ

Also Published As

Publication number Publication date
EP0048979B2 (en) 1990-08-08
DE3174473D1 (en) 1986-05-28
JPS6046899B2 (ja) 1985-10-18
US4527020A (en) 1985-07-02
EP0048979A2 (en) 1982-04-07
EP0048979B1 (en) 1986-04-23
CA1178731A (en) 1984-11-27
EP0048979A3 (en) 1983-06-29

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