MY8600355A - Method of providing adaptive echo cancellation in transmission of digital information in duplex, and apparatus for performing the method - Google Patents

Method of providing adaptive echo cancellation in transmission of digital information in duplex, and apparatus for performing the method

Info

Publication number
MY8600355A
MY8600355A MY355/86A MY8600355A MY8600355A MY 8600355 A MY8600355 A MY 8600355A MY 355/86 A MY355/86 A MY 355/86A MY 8600355 A MY8600355 A MY 8600355A MY 8600355 A MY8600355 A MY 8600355A
Authority
MY
Malaysia
Prior art keywords
duplex
transmission
digital information
echo cancellation
adaptive echo
Prior art date
Application number
MY355/86A
Other languages
English (en)
Inventor
Carlqvist
Bengt Roland
Original Assignee
Ericsson Telefon Ab L M
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 Ericsson Telefon Ab L M filed Critical Ericsson Telefon Ab L M
Publication of MY8600355A publication Critical patent/MY8600355A/xx

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
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Filters That Use Time-Delay Elements (AREA)
  • Bidirectional Digital Transmission (AREA)
  • Analogue/Digital Conversion (AREA)
MY355/86A 1981-11-02 1986-12-30 Method of providing adaptive echo cancellation in transmission of digital information in duplex, and apparatus for performing the method MY8600355A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE8106444A SE426764B (sv) 1981-11-02 1981-11-02 Forfarande att astadkomma adaptiv ekoeliminering vid overforing av digital information i duplex jemte anordning for utforande av forfarandet

Publications (1)

Publication Number Publication Date
MY8600355A true MY8600355A (en) 1986-12-31

Family

ID=20344930

Family Applications (1)

Application Number Title Priority Date Filing Date
MY355/86A MY8600355A (en) 1981-11-02 1986-12-30 Method of providing adaptive echo cancellation in transmission of digital information in duplex, and apparatus for performing the method

Country Status (19)

Country Link
US (1) US4539674A (it)
EP (1) EP0092570B1 (it)
JP (1) JPS58501850A (it)
KR (1) KR860002211B1 (it)
AU (1) AU553372B2 (it)
BR (1) BR8207953A (it)
CA (2) CA1205876A (it)
DE (1) DE3265650D1 (it)
DK (1) DK306483A (it)
ES (1) ES516965A0 (it)
FI (1) FI74561C (it)
IE (1) IE53759B1 (it)
IT (1) IT1153338B (it)
MX (1) MX152441A (it)
MY (1) MY8600355A (it)
NO (1) NO157238C (it)
SE (1) SE426764B (it)
WO (1) WO1983001716A1 (it)
YU (1) YU244082A (it)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE434789B (sv) * 1982-12-21 1984-08-13 Ellemtel Utvecklings Ab Forfarande for detektering av farliga linjespenningar over en tvatradig linje
FR2540314A1 (fr) * 1983-01-31 1984-08-03 Trt Telecom Radio Electr Procede d'initialisation des coefficients de filtres dans un dispositif d'annulation d'echos proche et lointain et dispositif de mise en oeuvre de ce procede
JPS59151546A (ja) * 1983-02-18 1984-08-30 Nec Corp 適応形反響消去装置
DE3327467A1 (de) * 1983-07-29 1985-02-14 Siemens AG, 1000 Berlin und 8000 München Verfahren und schaltungsanordnung zur kompensation von echosignalen
US4707824A (en) * 1983-12-15 1987-11-17 Nec Corporation Method and apparatus for cancelling echo
SE441052B (sv) * 1984-02-01 1985-09-02 Ellemtel Utvecklings Ab Forfarande for att testa funktionen hos en anordning for adaptiv ekoeliminering
IT1178913B (it) * 1984-03-26 1987-09-16 Cselt Centro Studi Lab Telecom Sistema per la trassmissione bidire zionale con cancellazione d eco
US4672665A (en) * 1984-07-27 1987-06-09 Matsushita Electric Industrial Co. Ltd. Echo canceller
US4989221A (en) * 1987-03-30 1991-01-29 Codex Corporation Sample rate converter
US5062102A (en) * 1988-12-01 1991-10-29 Nec Corporation Echo canceller with means for determining filter coefficients from autocorrelation and cross-correlation coefficients
US5852661A (en) * 1995-02-17 1998-12-22 Advanced Micro Devices, Inc. Adaptive echo cancellation used with echo suppression to reduce short and long duration echoes
US6965578B1 (en) * 1998-09-30 2005-11-15 Conexant Systems, Inc. Echo canceling method and apparatus for digital data communication system

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2277470A1 (fr) * 1974-07-03 1976-01-30 Cit Alcatel Dispositif de centrage d'un filtre transversal d'un annuleur d'echo
NL170688C (nl) * 1976-06-28 1982-12-01 Philips Nv Inrichting voor simultane tweerichtingsdatatransmissie over tweedraadsverbindingen.
US4074086A (en) * 1976-09-07 1978-02-14 Bell Telephone Laboratories, Incorporated Joint adaptive echo canceller and equalizer for two-wire full-duplex data transmission
AU514263B2 (en) * 1977-01-17 1981-01-29 T.R.T. Digital echo canceller
DE2729109A1 (de) * 1977-06-28 1979-01-11 Siemens Ag Schaltungsanordnung zur kompensation von echos in nichtsynchronen traegerfrequenzsystemen
US4268727A (en) * 1979-03-14 1981-05-19 International Telephone And Telegraph Corporation Adaptive digital echo cancellation circuit
US4425483A (en) * 1981-10-13 1984-01-10 Northern Telecom Limited Echo cancellation using transversal filters

Also Published As

Publication number Publication date
NO832420L (no) 1983-07-01
YU244082A (en) 1985-04-30
EP0092570A1 (en) 1983-11-02
MX152441A (es) 1985-07-15
EP0092570B1 (en) 1985-08-21
AU9122282A (en) 1983-05-18
AU553372B2 (en) 1986-07-10
KR860002211B1 (ko) 1986-12-31
CA1205876A (en) 1986-06-10
ES8402483A1 (es) 1984-01-16
DE3265650D1 (en) 1985-09-26
DK306483D0 (da) 1983-07-01
KR840002785A (ko) 1984-07-16
JPS58501850A (ja) 1983-10-27
DK306483A (da) 1983-07-01
IE53759B1 (en) 1989-02-01
FI74561C (sv) 1988-02-08
ES516965A0 (es) 1984-01-16
FI832228L (fi) 1983-06-17
IE822605L (en) 1983-05-02
BR8207953A (pt) 1983-10-04
FI832228A0 (fi) 1983-06-17
US4539674A (en) 1985-09-03
IT1153338B (it) 1987-01-14
IT8224025A1 (it) 1984-05-02
WO1983001716A1 (en) 1983-05-11
IT8224025A0 (it) 1982-11-02
FI74561B (fi) 1987-10-30
CA1191224A (en) 1985-07-30
NO157238C (no) 1988-02-10
SE426764B (sv) 1983-02-07
NO157238B (no) 1987-11-02

Similar Documents

Publication Publication Date Title
AU550818B2 (en) Improved method and apparatus for cancelling vibrations
DE3379766D1 (en) Method of reducing the convergence time of an echo canceller, and apparatus for carrying out this method
DE3271186D1 (en) Interference cancellation method and apparatus
DE3366616D1 (en) Adaptive echo suppressor and method
CS375181A3 (en) Self-correcting method of data transmission and apparatus for making the same
GB2099663B (en) Method and apparatus for signal-eye tracking in digital transmission systems
DE3261928D1 (en) Method and apparatus for measuring ultrasonic attenuation characteristics
DE3478176D1 (en) Method and apparatus for cancelling echo
ZA824145B (en) Method and apparatus for reducing repetitive noise entering the ear
AU573572B2 (en) Method for the transmission of informations and/or instruct- ions
AU2967984A (en) Multiprocessor communication method and apparatus
JPS57178527A (en) Digital data transmission method and apparatus
DE3375871D1 (en) Receiver for a data transmission modem comprising an echo canceller and an equalizer
GB8332951D0 (en) Duplex speech transmission
DE3167257D1 (en) Transmission methods and apparatus for implementing the method
DE3473979D1 (en) Method of reducing the convergence time of an echo canceller, and device for performing this method
DE3265650D1 (en) Method of providing adaptive echo cancellation in transmission of digital information in duplex, and apparatus for performing the method
GB2164827B (en) Method of cancelling echoes in full-duplex data transmission system
AU6872281A (en) Line echo cancelling apparatus
IL63117A0 (en) Apparatus and method for transmission of digital information
EP0093177A4 (en) METHOD AND DEVICE FOR DOUBLE-SIDED COATING.
AU547254B2 (en) Digital echo canceller
DE3272249D1 (en) Method for the protection against transmission errors of radio-telegraph messages, and apparatus for carrying out said method
GB2078062B (en) Message transmission reception and processing apparatus
JPS5762096A (en) Method and device for transmitting adaptive voice signal