JPS57140040A - Echo canceller - Google Patents

Echo canceller

Info

Publication number
JPS57140040A
JPS57140040A JP2491081A JP2491081A JPS57140040A JP S57140040 A JPS57140040 A JP S57140040A JP 2491081 A JP2491081 A JP 2491081A JP 2491081 A JP2491081 A JP 2491081A JP S57140040 A JPS57140040 A JP S57140040A
Authority
JP
Japan
Prior art keywords
circuit
signal
tap coefficient
amount
content
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
JP2491081A
Other languages
English (en)
Japanese (ja)
Other versions
JPS647704B2 (enExample
Inventor
Takashi Ogiwara
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
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP2491081A priority Critical patent/JPS57140040A/ja
Publication of JPS57140040A publication Critical patent/JPS57140040A/ja
Publication of JPS647704B2 publication Critical patent/JPS647704B2/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
JP2491081A 1981-02-24 1981-02-24 Echo canceller Granted JPS57140040A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2491081A JPS57140040A (en) 1981-02-24 1981-02-24 Echo canceller

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2491081A JPS57140040A (en) 1981-02-24 1981-02-24 Echo canceller

Publications (2)

Publication Number Publication Date
JPS57140040A true JPS57140040A (en) 1982-08-30
JPS647704B2 JPS647704B2 (enExample) 1989-02-09

Family

ID=12151327

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2491081A Granted JPS57140040A (en) 1981-02-24 1981-02-24 Echo canceller

Country Status (1)

Country Link
JP (1) JPS57140040A (enExample)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61239728A (ja) * 1985-03-27 1986-10-25 Fujitsu Ltd エコ−キヤンセラ装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52153315A (en) * 1976-06-11 1977-12-20 Communications Satellite Corp Digital echo cancelling unit and rms value circuit
JPS5354408A (en) * 1976-10-27 1978-05-17 Nec Corp Applicable echo suppressor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS52153315A (en) * 1976-06-11 1977-12-20 Communications Satellite Corp Digital echo cancelling unit and rms value circuit
JPS5354408A (en) * 1976-10-27 1978-05-17 Nec Corp Applicable echo suppressor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61239728A (ja) * 1985-03-27 1986-10-25 Fujitsu Ltd エコ−キヤンセラ装置

Also Published As

Publication number Publication date
JPS647704B2 (enExample) 1989-02-09

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