WO2001001665A3 - Host-based speaker phone - Google Patents

Host-based speaker phone

Info

Publication number
WO2001001665A3
WO2001001665A3 PCT/US2000/017148 US0017148W WO0101665A3 WO 2001001665 A3 WO2001001665 A3 WO 2001001665A3 US 0017148 W US0017148 W US 0017148W WO 0101665 A3 WO0101665 A3 WO 0101665A3
Authority
WO
WIPO (PCT)
Prior art keywords
signals
communication system
echo cancellor
internal
communication
Prior art date
Application number
PCT/US2000/017148
Other languages
French (fr)
Other versions
WO2001001665A2 (en
Inventor
Dana Porrat
Yair Kerner
Original Assignee
Conexant Systems 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 Conexant Systems Inc filed Critical Conexant Systems Inc
Publication of WO2001001665A2 publication Critical patent/WO2001001665A2/en
Publication of WO2001001665A3 publication Critical patent/WO2001001665A3/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
    • 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

Abstract

The present invention includes a communication system comprising a first transducer (106) that detects and converts external audio signals into internal electronic signals formatted to be compatible with internal operations of the communication system. The communication system also includes a second transducer (110) that converts internal communication signals into external audio signals. In addition, at least one echo cancellor (200) is included in the communication system and cancels undesirable internal communication signals. Assisting the at least one echo cancellor is a delay module (210) that enables the at least one echo cancellor to carry out specific cancellation procedures during a time period when specific undesirable communication signals are estimated to be passing through the echo cancellor.
PCT/US2000/017148 1999-06-25 2000-06-22 Host-based speaker phone WO2001001665A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US34479699A 1999-06-25 1999-06-25
US09/344,796 1999-06-25

Publications (2)

Publication Number Publication Date
WO2001001665A2 WO2001001665A2 (en) 2001-01-04
WO2001001665A3 true WO2001001665A3 (en) 2001-07-05

Family

ID=23352078

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2000/017148 WO2001001665A2 (en) 1999-06-25 2000-06-22 Host-based speaker phone

Country Status (1)

Country Link
WO (1) WO2001001665A2 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5495473A (en) * 1994-12-28 1996-02-27 Intel Corporation Method and apparatus for implementing hardware independent echo cancellation in a full-duplex audio stream in a computer system
EP0746133A2 (en) * 1995-05-31 1996-12-04 AT&T Corp. Multistage echo canceller including time variation compensation
EP0765066A2 (en) * 1995-09-21 1997-03-26 Rockwell International Corporation Efficient speakerphone anti-howling system
US5687229A (en) * 1992-09-25 1997-11-11 Qualcomm Incorporated Method for controlling echo canceling in an echo canceller

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5687229A (en) * 1992-09-25 1997-11-11 Qualcomm Incorporated Method for controlling echo canceling in an echo canceller
US5495473A (en) * 1994-12-28 1996-02-27 Intel Corporation Method and apparatus for implementing hardware independent echo cancellation in a full-duplex audio stream in a computer system
EP0746133A2 (en) * 1995-05-31 1996-12-04 AT&T Corp. Multistage echo canceller including time variation compensation
EP0765066A2 (en) * 1995-09-21 1997-03-26 Rockwell International Corporation Efficient speakerphone anti-howling system

Also Published As

Publication number Publication date
WO2001001665A2 (en) 2001-01-04

Similar Documents

Publication Publication Date Title
AU4563700A (en) Enhancement of near-end voice signals in an echo suppression system
CA2138698A1 (en) Telephone Set with Background Noise Suppression Function
CA2232316A1 (en) Apparatus and method for initiating a transaction having acoustic data receiver that filters human voice
EP0765066A3 (en) Efficient speakerphone anti-howling system
DE3585532D1 (en) FULL-DUPLEX TELEPHONE SET FOR RADIO AND OVERLAND LINES.
AU7614000A (en) Noise suppression system with dual microphone echo cancellation
AU2001286937A1 (en) Sppech recognition method and system to determine the status of an outbound telephone call
CA2056516A1 (en) Dual mode cellular radio communication apparatus having an echo canceller employed in both analog and digital modes
EP0390386A3 (en) Noise reducing device
EP1091539A3 (en) A portable electronic device
CA2246865A1 (en) Nonlinear processor for acoustic echo canceller
WO2004053838A3 (en) Method and apparatus for noise reduction
WO1998056208A3 (en) Cabin communication system
WO2005081686A3 (en) Sonar system and process
AU5554000A (en) Reducing distortion of signals
WO1998004079A3 (en) Echo canceler for non-linear circuits
CA2293911A1 (en) Echo cancelling/suppression for handsets
CA2430030A1 (en) Distributed echo cancelling
EP0739123A3 (en) Communication unit with residual acoustic echo suppression and method for suppressing residual echoes
CA2162538A1 (en) Echo cancelling system suitable for voice conference
WO2001001665A3 (en) Host-based speaker phone
WO2000060830A3 (en) Mobile telephone
KR20020086433A (en) Handsfree device including function of noise cancellation and ear-mic structure for the same
CA2490709A1 (en) Method and apparatus for controlling echo cancellation
AU3608400A (en) An adaptive filtering system and method for cancelling echoes and reducing noisein digital signals

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): CN JP

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
AK Designated states

Kind code of ref document: A3

Designated state(s): CN JP

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP