JPS5789337A - Echo erasing device - Google Patents

Echo erasing device

Info

Publication number
JPS5789337A
JPS5789337A JP16563180A JP16563180A JPS5789337A JP S5789337 A JPS5789337 A JP S5789337A JP 16563180 A JP16563180 A JP 16563180A JP 16563180 A JP16563180 A JP 16563180A JP S5789337 A JPS5789337 A JP S5789337A
Authority
JP
Japan
Prior art keywords
level
echo
signal
output
measuring circuit
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
JP16563180A
Other languages
English (en)
Japanese (ja)
Other versions
JPH0131731B2 (cs
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
Application filed by NEC Corp, Nippon Electric Co Ltd filed Critical NEC Corp
Priority to JP16563180A priority Critical patent/JPS5789337A/ja
Publication of JPS5789337A publication Critical patent/JPS5789337A/ja
Publication of JPH0131731B2 publication Critical patent/JPH0131731B2/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)
JP16563180A 1980-11-25 1980-11-25 Echo erasing device Granted JPS5789337A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16563180A JPS5789337A (en) 1980-11-25 1980-11-25 Echo erasing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16563180A JPS5789337A (en) 1980-11-25 1980-11-25 Echo erasing device

Publications (2)

Publication Number Publication Date
JPS5789337A true JPS5789337A (en) 1982-06-03
JPH0131731B2 JPH0131731B2 (cs) 1989-06-27

Family

ID=15816027

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16563180A Granted JPS5789337A (en) 1980-11-25 1980-11-25 Echo erasing device

Country Status (1)

Country Link
JP (1) JPS5789337A (cs)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5949027A (ja) * 1982-09-14 1984-03-21 Fujitsu Ltd エコ−キヤンセラ制御方式

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5949027A (ja) * 1982-09-14 1984-03-21 Fujitsu Ltd エコ−キヤンセラ制御方式

Also Published As

Publication number Publication date
JPH0131731B2 (cs) 1989-06-27

Similar Documents

Publication Publication Date Title
DE3475254D1 (en) Echo canceller systems
CA2004379A1 (en) Echo canceller with means for determining filter coefficients from autocorrelation and cross-correlation coefficients
WO1995006382A3 (en) A voice activity detector for an echo suppressor and an echo suppressor
SE9504520L (sv) Förfarande och anordning för ekosläckning genom skattning av effekt hos residualsignal
CA2195261A1 (en) Echo canceler e-side speech detector
JPS5789337A (en) Echo erasing device
JPS5742242A (en) Two-wire type bidirectional amplifier system
FI935840A0 (fi) Foerfarande och anordning foer ekoundertryckning i en telefonapparat
JPS52133284A (en) Probing device equipped with automatic inspection function
JPS6427325A (en) Echo canceller
JPS5767853A (en) Method for standardization of ae signal and discrimination of ae signal source
JPS51129112A (en) Transmission quality measuring device
JPS57100362A (en) Ultrasonic wave measuring device
JPS571927A (en) Measuring apparatus for coefficient of correlation
JPS5760742A (en) Adaptive echo erasing device
JPS648755A (en) Conference communication equipment
JPS5779772A (en) Fadar circuit
JPS54118719A (en) Measurement method for crosstalk attenuation quantity
JPS54124912A (en) Channel test system of time-division electronic switchboard
EP0543274A3 (en) Method and apparatus for controlling a residual echo limiter
JPS5628530A (en) Terminal equipment in two-way data communication system having transmission signal level automatic control mechanism
JPS5754466A (en) Test device for facsimile device
JPS6478063A (en) Automatic confronting test device for in-band ringer
JPS57139670A (en) Measuring device for electric field strength
JPS57147339A (en) Measurement system for transmission characteristics