ATE66554T1 - In einen relp-vocoder integrierter echokompensator mit linearer praediktion. - Google Patents

In einen relp-vocoder integrierter echokompensator mit linearer praediktion.

Info

Publication number
ATE66554T1
ATE66554T1 AT87906144T AT87906144T ATE66554T1 AT E66554 T1 ATE66554 T1 AT E66554T1 AT 87906144 T AT87906144 T AT 87906144T AT 87906144 T AT87906144 T AT 87906144T AT E66554 T1 ATE66554 T1 AT E66554T1
Authority
AT
Austria
Prior art keywords
signal
foreground
transmit
received
echoed
Prior art date
Application number
AT87906144T
Other languages
English (en)
Inventor
David Tzat Kin Wang
Philip John Wilson
Original Assignee
Titan Linkabit Corp
Hughes Network Systems
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 Titan Linkabit Corp, Hughes Network Systems filed Critical Titan Linkabit Corp
Application granted granted Critical
Publication of ATE66554T1 publication Critical patent/ATE66554T1/de

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)
  • Telephone Function (AREA)
  • Magnetic Resonance Imaging Apparatus (AREA)
  • Time Recorders, Dirve Recorders, Access Control (AREA)
  • Recording Measured Values (AREA)
  • Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
  • Fluid-Damping Devices (AREA)
  • Medicines Containing Antibodies Or Antigens For Use As Internal Diagnostic Agents (AREA)
AT87906144T 1986-09-05 1987-09-01 In einen relp-vocoder integrierter echokompensator mit linearer praediktion. ATE66554T1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US06/904,551 US4697261A (en) 1986-09-05 1986-09-05 Linear predictive echo canceller integrated with RELP vocoder
EP87906144A EP0280719B1 (de) 1986-09-05 1987-09-01 In einen relp-vocoder integrierter echokompensator mit linearer prädiktion
PCT/US1987/002225 WO1988001812A1 (en) 1986-09-05 1987-09-01 Linear predictive echo canceller integrated with relp vocoder

Publications (1)

Publication Number Publication Date
ATE66554T1 true ATE66554T1 (de) 1991-09-15

Family

ID=25419347

Family Applications (1)

Application Number Title Priority Date Filing Date
AT87906144T ATE66554T1 (de) 1986-09-05 1987-09-01 In einen relp-vocoder integrierter echokompensator mit linearer praediktion.

Country Status (10)

Country Link
US (1) US4697261A (de)
EP (1) EP0280719B1 (de)
JP (1) JP2769486B2 (de)
AT (1) ATE66554T1 (de)
AU (1) AU587725B2 (de)
CA (1) CA1259144A (de)
DE (1) DE3772375D1 (de)
DK (1) DK243488D0 (de)
NO (1) NO174690C (de)
WO (1) WO1988001812A1 (de)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4776014A (en) * 1986-09-02 1988-10-04 General Electric Company Method for pitch-aligned high-frequency regeneration in RELP vocoders
US5062102A (en) * 1988-12-01 1991-10-29 Nec Corporation Echo canceller with means for determining filter coefficients from autocorrelation and cross-correlation coefficients
JPH02280422A (ja) * 1989-04-20 1990-11-16 Nec Corp 音声会議装置用エコーキャンセラのトレーニング方法
US5388092A (en) * 1989-06-27 1995-02-07 Nec Corporation Echo canceller for two-wire full duplex digital data transmission
US5307405A (en) * 1992-09-25 1994-04-26 Qualcomm Incorporated Network echo canceller
GB2271909B (en) * 1992-10-21 1996-05-22 Lotus Car Adaptive control system
FR2715784B1 (fr) * 1994-02-02 1996-03-29 Jacques Prado Procédé et dispositif d'analyse d'un signal de retour et annuleur d'écho adaptatif en comportant application.
US5790632A (en) * 1994-09-30 1998-08-04 Qualcom Incorporated Method and apparatus for echo canceling accounting for companding induced quantization error
US5659581A (en) * 1994-12-13 1997-08-19 Paradyne Corporation Modem receiver pre-emphasis
FR2729024A1 (fr) * 1994-12-30 1996-07-05 Matra Communication Annuleur d'echo acoustique avec filtrage en sous-bandes
US5649012A (en) * 1995-09-15 1997-07-15 Hughes Electronics Method for synthesizing an echo path in an echo canceller
US5675644A (en) * 1995-09-26 1997-10-07 Qualcomm Incorporated Method and apparatus for canceling echo accounting for delay variations
US6125179A (en) * 1995-12-13 2000-09-26 3Com Corporation Echo control device with quick response to sudden echo-path change
US5835486A (en) * 1996-07-11 1998-11-10 Dsc/Celcore, Inc. Multi-channel transcoder rate adapter having low delay and integral echo cancellation
US5751901A (en) * 1996-07-31 1998-05-12 Qualcomm Incorporated Method for searching an excitation codebook in a code excited linear prediction (CELP) coder
CN1111973C (zh) * 1996-08-01 2003-06-18 北方电讯网络有限公司 改进了的数字蜂窝应用的回波消除器
US5857167A (en) * 1997-07-10 1999-01-05 Coherant Communications Systems Corp. Combined speech coder and echo canceler
GB2336279A (en) * 1998-03-30 1999-10-13 Motorola Inc Echo canceller and method for device having a decoder
US6718036B1 (en) * 1999-12-15 2004-04-06 Nortel Networks Limited Linear predictive coding based acoustic echo cancellation
US6606382B2 (en) 2000-01-27 2003-08-12 Qualcomm Incorporated System and method for implementation of an echo canceller
US6625845B2 (en) * 2000-03-24 2003-09-30 Sharp Kabushiki Kaisha Cyclonic vacuum cleaner
US20050213748A1 (en) * 2004-02-11 2005-09-29 Rtx Telecom A/S Line extender for high speed modem data transfer
US7907977B2 (en) * 2007-10-02 2011-03-15 Agere Systems Inc. Echo canceller with correlation using pre-whitened data values received by downlink codec

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3161838A (en) * 1962-09-12 1964-12-15 Bell Telephone Labor Inc Elimination of operationally induced noise fluctuations in echo suppressor apparatus
JPS5632812B2 (de) * 1972-02-23 1981-07-30
JPS49110203A (de) * 1973-02-20 1974-10-21
JPS5792927A (en) * 1980-11-29 1982-06-09 Toshiba Corp Echo cancelling device
JPS59151546A (ja) * 1983-02-18 1984-08-30 Nec Corp 適応形反響消去装置
US4645883A (en) * 1984-05-09 1987-02-24 Communications Satellite Corporation Double talk and line noise detector for a echo canceller
FR2564667B1 (fr) * 1984-05-15 1986-09-19 Trt Telecom Radio Electr Dispositif de commande d'un annuleur d'echo et d'un ecreteur de centre
US4609787A (en) * 1984-05-21 1986-09-02 Communications Satellite Corporation Echo canceller with extended frequency range
GB8423017D0 (en) * 1984-09-12 1984-10-17 Plessey Co Plc Echo canceller
US4591669A (en) * 1984-09-26 1986-05-27 At&T Bell Laboratories Adaptive filter update gain normalization

Also Published As

Publication number Publication date
EP0280719A4 (de) 1989-07-19
NO881801D0 (no) 1988-04-25
DE3772375D1 (de) 1991-09-26
AU7966187A (en) 1988-03-24
NO881801L (no) 1988-07-05
US4697261A (en) 1987-09-29
NO174690B (no) 1994-03-07
CA1259144A (en) 1989-09-05
EP0280719A1 (de) 1988-09-07
DK243488A (da) 1988-05-04
AU587725B2 (en) 1989-08-24
JPH01500872A (ja) 1989-03-23
JP2769486B2 (ja) 1998-06-25
DK243488D0 (da) 1988-05-04
NO174690C (no) 1994-06-15
EP0280719B1 (de) 1991-08-21
WO1988001812A1 (en) 1988-03-10

Similar Documents

Publication Publication Date Title
ATE66554T1 (de) In einen relp-vocoder integrierter echokompensator mit linearer praediktion.
CA2162570A1 (en) Echo canceler and echo path estimating method
AU2003268002A8 (en) Frequency domain equalization of communication signals
SE8704178L (sv) Digital talprocessor
EP0627825A3 (de) Mehrkanal-Echokompensationsverfahren und Vorrichtung dafür
BR9712177A (pt) Processos de cancelamento de eco e de determinar um período afetado pelo silêncio em um procedimento de cancelamento de eco, e cancelador de eco.
TR199800691T1 (xx) Uyarlanabilen �ift filtreli yank� iptal y�ntemi.
EP0898267A3 (de) Einrichtung und Verfahren zur Sprachkodierung
DE69535121T8 (de) Echokompensator und dessen lernverfahren
JPS6442929A (en) All double data transmission tranceiver
TR199902332T2 (xx) Bir ba�lant�n�n iki ucunda da olu�an ekonun kontrol edilmesi i�in y�ntem ve ekipman
SE8205840L (sv) Ekoeliminator
JPS6429132A (en) Echo canceller
AU561497B2 (en) Differential pcm transmission
JPS5283112A (en) Two-ways amplifier
Wilson et al. An integrated voice codec and echo canceller implemented in a single DSP processor
IT969974B (it) Sistema di trasmissione di conversazione
JPS5496065A (en) Distance measuring method
KR960016294A (ko) 데이타 송수신 장치
JPS5627547A (en) Method and device for predictive coding and decoding
TW281833B (en) Method and apparatus for reducing residual far-end echo in voice communications networks
FI990865A7 (fi) Signaalinkäsittelylaite
Enzner et al. Concept for Combined Reduction of Acoustic Echo and Coding Noise in Digital Cellular Networks
GB2061677B (en) Helium-speech communication
MX9606483A (es) Metodo y sistema para realizar reconocimiento de habla.