ATA309387A - METHOD FOR ADAPTIVELY COMPENSATING AN ECHO IN A COMMUNICATION DEVICE - Google Patents

METHOD FOR ADAPTIVELY COMPENSATING AN ECHO IN A COMMUNICATION DEVICE

Info

Publication number
ATA309387A
ATA309387A AT309387A AT309387A ATA309387A AT A309387 A ATA309387 A AT A309387A AT 309387 A AT309387 A AT 309387A AT 309387 A AT309387 A AT 309387A AT A309387 A ATA309387 A AT A309387A
Authority
AT
Austria
Prior art keywords
echo
communication device
adaptively compensating
adaptively
compensating
Prior art date
Application number
AT309387A
Other languages
German (de)
Other versions
AT391784B (en
Inventor
Wolfgang Mag Tschirk
Original Assignee
Siemens Ag Oesterreich
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 Siemens Ag Oesterreich filed Critical Siemens Ag Oesterreich
Priority to AT309387A priority Critical patent/AT391784B/en
Priority to PCT/EP1988/001061 priority patent/WO1989005068A1/en
Publication of ATA309387A publication Critical patent/ATA309387A/en
Application granted granted Critical
Publication of AT391784B publication Critical patent/AT391784B/en

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
    • H04B3/231—Echo cancellers using readout of a memory to provide the echo replica
    • 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
    • H04B3/237—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 two adaptive filters, e.g. for near end and for end echo cancelling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M9/00—Arrangements for interconnection not involving centralised switching
    • H04M9/08—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic
    • H04M9/082—Two-way loud-speaking telephone systems with means for conditioning the signal, e.g. for suppressing echoes for one or both directions of traffic using echo cancellers

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
AT309387A 1987-11-25 1987-11-25 METHOD FOR ADAPTIVELY COMPENSATING AN ECHO IN A COMMUNICATION DEVICE AT391784B (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
AT309387A AT391784B (en) 1987-11-25 1987-11-25 METHOD FOR ADAPTIVELY COMPENSATING AN ECHO IN A COMMUNICATION DEVICE
PCT/EP1988/001061 WO1989005068A1 (en) 1987-11-25 1988-11-23 Process for adaptive compensation of echoes in a communication system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AT309387A AT391784B (en) 1987-11-25 1987-11-25 METHOD FOR ADAPTIVELY COMPENSATING AN ECHO IN A COMMUNICATION DEVICE

Publications (2)

Publication Number Publication Date
ATA309387A true ATA309387A (en) 1990-05-15
AT391784B AT391784B (en) 1990-11-26

Family

ID=3545211

Family Applications (1)

Application Number Title Priority Date Filing Date
AT309387A AT391784B (en) 1987-11-25 1987-11-25 METHOD FOR ADAPTIVELY COMPENSATING AN ECHO IN A COMMUNICATION DEVICE

Country Status (2)

Country Link
AT (1) AT391784B (en)
WO (1) WO1989005068A1 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991012683A1 (en) * 1990-02-16 1991-08-22 Fujitsu Limited Speaking device having hand-free conversational function
US5457684A (en) * 1993-12-21 1995-10-10 At&T Ipm Corp. Delay-less signal processing arrangement for use in an ATM network
ES2101633B1 (en) * 1994-05-31 1998-03-01 Alcatel Standard Electrica FIXED CELL PHONE TERMINAL FOR TWO-WIRE TELECOMMUNICATION SERVICES.
DE4430189A1 (en) * 1994-08-25 1996-02-29 Sel Alcatel Ag Adaptive echo cancellation method
US5646990A (en) * 1995-09-21 1997-07-08 Rockwell International Corporation Efficient speakerphone anti-howling system
JPH09289474A (en) * 1996-04-23 1997-11-04 Saitama Nippon Denki Kk Hand-free speaking device

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2412210A1 (en) * 1977-12-14 1979-07-13 Cit Alcatel SPEAKER TELEPHONE STATION
US4243959A (en) * 1979-06-21 1981-01-06 Bell Telephone Laboratories, Incorporated Adaptive filter with tap coefficient leakage
US4629829A (en) * 1984-12-14 1986-12-16 Motorola, Inc. Full duplex speakerphone for radio and landline telephones
DE3768975D1 (en) * 1986-01-30 1991-05-08 Siemens Ag Echo compensator.

Also Published As

Publication number Publication date
AT391784B (en) 1990-11-26
WO1989005068A1 (en) 1989-06-01

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Legal Events

Date Code Title Description
ELJ Ceased due to non-payment of the annual fee