JPS60117928A - エコ−キヤンセラの収束方式 - Google Patents

エコ−キヤンセラの収束方式

Info

Publication number
JPS60117928A
JPS60117928A JP22428983A JP22428983A JPS60117928A JP S60117928 A JPS60117928 A JP S60117928A JP 22428983 A JP22428983 A JP 22428983A JP 22428983 A JP22428983 A JP 22428983A JP S60117928 A JPS60117928 A JP S60117928A
Authority
JP
Japan
Prior art keywords
signal
echo canceller
sine wave
echo
sound
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
JP22428983A
Other languages
English (en)
Japanese (ja)
Other versions
JPS6253974B2 (cs
Inventor
Shigeyuki Umigami
重之 海上
Masami Koshikawa
越川　雅美
Tatsuki Hayashi
林　達城
Yutaka Moriyama
裕 盛山
Masaharu Shimada
正治 島田
Kiyohisa Wakabayashi
若林　清久
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.)
Fujitsu Ltd
Nippon Telegraph and Telephone Corp
Original Assignee
Fujitsu Ltd
Nippon Telegraph and Telephone 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 Fujitsu Ltd, Nippon Telegraph and Telephone Corp filed Critical Fujitsu Ltd
Priority to JP22428983A priority Critical patent/JPS60117928A/ja
Publication of JPS60117928A publication Critical patent/JPS60117928A/ja
Publication of JPS6253974B2 publication Critical patent/JPS6253974B2/ja
Granted 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
    • H04B3/238—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 using initial training sequence

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
JP22428983A 1983-11-30 1983-11-30 エコ−キヤンセラの収束方式 Granted JPS60117928A (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP22428983A JPS60117928A (ja) 1983-11-30 1983-11-30 エコ−キヤンセラの収束方式

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP22428983A JPS60117928A (ja) 1983-11-30 1983-11-30 エコ−キヤンセラの収束方式

Publications (2)

Publication Number Publication Date
JPS60117928A true JPS60117928A (ja) 1985-06-25
JPS6253974B2 JPS6253974B2 (cs) 1987-11-12

Family

ID=16811437

Family Applications (1)

Application Number Title Priority Date Filing Date
JP22428983A Granted JPS60117928A (ja) 1983-11-30 1983-11-30 エコ−キヤンセラの収束方式

Country Status (1)

Country Link
JP (1) JPS60117928A (cs)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01135132A (ja) * 1987-11-20 1989-05-26 Hitachi Ltd ハンズフリー電話機
JPH02260856A (ja) * 1988-12-28 1990-10-23 American Teleph & Telegr Co <Att> 音声信号処理方法
JPH02260855A (ja) * 1988-12-28 1990-10-23 American Teleph & Telegr Co <Att> 音声処理回路の動作準備状態を判断する方法
JPH02264548A (ja) * 1988-12-28 1990-10-29 American Teleph & Telegr Co <Att> 音響環境の型の確認方法

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH01135132A (ja) * 1987-11-20 1989-05-26 Hitachi Ltd ハンズフリー電話機
JPH02260856A (ja) * 1988-12-28 1990-10-23 American Teleph & Telegr Co <Att> 音声信号処理方法
JPH02260855A (ja) * 1988-12-28 1990-10-23 American Teleph & Telegr Co <Att> 音声処理回路の動作準備状態を判断する方法
JPH02264548A (ja) * 1988-12-28 1990-10-29 American Teleph & Telegr Co <Att> 音響環境の型の確認方法

Also Published As

Publication number Publication date
JPS6253974B2 (cs) 1987-11-12

Similar Documents

Publication Publication Date Title
US5263019A (en) Method and apparatus for estimating the level of acoustic feedback between a loudspeaker and microphone
CN104272378B (zh) 在噪音消除个人音频设备中的次级路径适应性响应的噪音突发脉冲调适
US4984265A (en) Device for forming the hands-free function in a telephone set, associating the gain switching and echo suppression functions
US8433060B2 (en) Method and system for stereo echo cancellation for VoIP communication systems
US5164989A (en) Echo cancellation methods and apparatus for voice processing systems
EP0468610A3 (en) Method and apparatus for performing noise cancelling in headphones
CA2189489A1 (en) Method and apparatus for reducing residual far-end echo in voice communication networks
JPH0648790B2 (ja) エコーキヤンセラ及びセンタクリツパ用制御装置
JPS60117928A (ja) エコ−キヤンセラの収束方式
US6181791B1 (en) Apparatus and method for reducing local interference in subscriber loop communication system
US5172411A (en) Two-wire/four-wire converter
JPS613536A (ja) 反響信号打消し装置
JPH07503109A (ja) エコー抑止に用いる適応フィルタの不要なパラメータ・ドリフトの危険性を減少させる装置
JPS58114555A (ja) ハウリング防止装置
JPH01314438A (ja) エコーキャンセラ
JPH06101668B2 (ja) エコ−サプレツサ
KR960016294A (ko) 데이타 송수신 장치
JPH07303072A (ja) ダブルトーク検出方法および装置
JPS6181035A (ja) エコ−キヤンセル方式
JPH04196624A (ja) エコーキャンセラ装置
JPH03232349A (ja) 無線電話装置
JPH03109828A (ja) 平坦遅延長計測方法および装置、反響消去装置ならびに電話端末
JPH07123237B2 (ja) デ−タ伝送用エコ−キヤンセル装置
JPS6348923A (ja) エコ−キヤンセラ−
JPH06338826A (ja) 音響反響除去装置