CA2004168A1 - Telephone a haut-parleur commande par ordinateur adaptable a une ligne de communication - Google Patents

Telephone a haut-parleur commande par ordinateur adaptable a une ligne de communication

Info

Publication number
CA2004168A1
CA2004168A1 CA2004168A CA2004168A CA2004168A1 CA 2004168 A1 CA2004168 A1 CA 2004168A1 CA 2004168 A CA2004168 A CA 2004168A CA 2004168 A CA2004168 A CA 2004168A CA 2004168 A1 CA2004168 A1 CA 2004168A1
Authority
CA
Canada
Prior art keywords
speakerphone
adapting
hybrid
line
computer controlled
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
CA2004168A
Other languages
English (en)
Other versions
CA2004168C (fr
Inventor
Richard Henry Erving
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.)
AT&T Corp
Original Assignee
American Telephone and Telegraph Co Inc
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 American Telephone and Telegraph Co Inc filed Critical American Telephone and Telegraph Co Inc
Publication of CA2004168A1 publication Critical patent/CA2004168A1/fr
Application granted granted Critical
Publication of CA2004168C publication Critical patent/CA2004168C/fr
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/06—Receivers
    • 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
    • H04M9/085—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 digital techniques

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Function (AREA)
  • Telephone Set Structure (AREA)
  • Headphones And Earphones (AREA)
CA002004168A 1988-12-28 1989-11-29 Telephone a haut-parleur commande par ordinateur adaptable a une ligne de communication Expired - Fee Related CA2004168C (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US07/290,771 US4901346A (en) 1988-12-28 1988-12-28 Computer controlled speakerphone for adapting to a communication line
US290,771 1988-12-28

Publications (2)

Publication Number Publication Date
CA2004168A1 true CA2004168A1 (fr) 1990-06-28
CA2004168C CA2004168C (fr) 1994-07-19

Family

ID=23117491

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002004168A Expired - Fee Related CA2004168C (fr) 1988-12-28 1989-11-29 Telephone a haut-parleur commande par ordinateur adaptable a une ligne de communication

Country Status (9)

Country Link
US (1) US4901346A (fr)
EP (1) EP0376588B1 (fr)
JP (1) JPH02260857A (fr)
KR (1) KR970007982B1 (fr)
AU (1) AU615821B2 (fr)
CA (1) CA2004168C (fr)
DE (1) DE68916220T2 (fr)
ES (1) ES2055798T3 (fr)
HK (1) HK124995A (fr)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5187741A (en) * 1990-11-30 1993-02-16 At&T Bell Laboratories Enhanced acoustic calibration procedure for a voice switched speakerphone
US5297198A (en) * 1991-12-27 1994-03-22 At&T Bell Laboratories Two-way voice communication methods and apparatus
JPH06338934A (ja) * 1993-05-25 1994-12-06 Exar Corp 事象駆動型制御回路を有するスピーカーホーン
US6594688B2 (en) 1993-10-01 2003-07-15 Collaboration Properties, Inc. Dedicated echo canceler for a workstation
US5715309A (en) * 1995-03-03 1998-02-03 Advanced Micro Devices, Inc. Conversion of compressed speech codes between attenuated and unattenuated formats
FR2748184B1 (fr) * 1996-04-26 1998-07-17 France Telecom Procede et dispositif d'annulation d'echo
US5734715A (en) * 1995-09-13 1998-03-31 France Telecom Process and device for adaptive identification and adaptive echo canceller relating thereto
US5892823A (en) * 1996-03-27 1999-04-06 Hello Direct, Inc. Smart interface technology
US6377679B1 (en) * 1996-12-26 2002-04-23 Kabushiki Kaisha Kobe Seiko Sho Speakerphone
US6868157B1 (en) 1997-09-16 2005-03-15 Sanyo Electric Co., Ltd. Echo canceling method, echo canceller and voice switch
US5991398A (en) * 1998-04-17 1999-11-23 Ameritech Corporation Telephone terminal apparatus and method
US6535604B1 (en) 1998-09-04 2003-03-18 Nortel Networks Limited Voice-switching device and method for multiple receivers
US20040240664A1 (en) * 2003-03-07 2004-12-02 Freed Evan Lawrence Full-duplex speakerphone
JP6485739B2 (ja) * 2015-03-23 2019-03-20 パナソニックＩｐマネジメント株式会社 音声処理装置、インターホン装置、及びインターホンシステム

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2161047B (en) * 1984-06-28 1987-09-16 Stc Plc Improvements in telephone instruments
US4608462A (en) * 1984-06-29 1986-08-26 International Standard Electric Corporation Telephone instrument circuit
GB2174578B (en) * 1985-05-04 1988-11-09 Stc Plc Loud speaking telephone
JPS61258554A (ja) * 1985-05-13 1986-11-15 Matsushita Electric Ind Co Ltd 拡声電話装置
JPS63161762A (ja) * 1986-12-24 1988-07-05 Matsushita Electric Ind Co Ltd エコ−キヤンセラ形双方向増幅装置

Also Published As

Publication number Publication date
JPH02260857A (ja) 1990-10-23
KR970007982B1 (ko) 1997-05-19
EP0376588B1 (fr) 1994-06-15
JPH0544221B2 (fr) 1993-07-05
DE68916220T2 (de) 1995-01-19
DE68916220D1 (de) 1994-07-21
HK124995A (en) 1995-08-11
EP0376588A3 (en) 1990-12-05
AU615821B2 (en) 1991-10-10
AU4722489A (en) 1990-07-05
KR900011169A (ko) 1990-07-11
EP0376588A2 (fr) 1990-07-04
CA2004168C (fr) 1994-07-19
ES2055798T3 (es) 1994-09-01
US4901346A (en) 1990-02-13

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Legal Events

Date Code Title Description
EEER Examination request
MKLA Lapsed