BRPI0816218A2 - Cancelamento de eco acústico baseado em ambiente de ruído - Google Patents

Cancelamento de eco acústico baseado em ambiente de ruído

Info

Publication number
BRPI0816218A2
BRPI0816218A2 BRPI0816218-2A BRPI0816218A BRPI0816218A2 BR PI0816218 A2 BRPI0816218 A2 BR PI0816218A2 BR PI0816218 A BRPI0816218 A BR PI0816218A BR PI0816218 A2 BRPI0816218 A2 BR PI0816218A2
Authority
BR
Brazil
Prior art keywords
present
signal path
noise
uplink
audio
Prior art date
Application number
BRPI0816218-2A
Other languages
English (en)
Inventor
Jincheng Wu
Joel A Clark
Original Assignee
Motorola 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 Motorola Inc filed Critical Motorola Inc
Publication of BRPI0816218A2 publication Critical patent/BRPI0816218A2/pt
Publication of BRPI0816218A8 publication Critical patent/BRPI0816218A8/pt

Links

Classifications

    • 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)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Telephone Function (AREA)
BRPI0816218A 2007-08-31 2008-08-26 Cancelamento de eco acústico baseado em ambiente de ruído BRPI0816218A8 (pt)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/848,376 US7809129B2 (en) 2007-08-31 2007-08-31 Acoustic echo cancellation based on noise environment
PCT/US2008/074281 WO2009029605A1 (en) 2007-08-31 2008-08-26 Acoustic echo cancellation based on noise environment

Publications (2)

Publication Number Publication Date
BRPI0816218A2 true BRPI0816218A2 (pt) 2015-06-16
BRPI0816218A8 BRPI0816218A8 (pt) 2015-12-01

Family

ID=39798119

Family Applications (1)

Application Number Title Priority Date Filing Date
BRPI0816218A BRPI0816218A8 (pt) 2007-08-31 2008-08-26 Cancelamento de eco acústico baseado em ambiente de ruído

Country Status (9)

Country Link
US (1) US7809129B2 (pt)
EP (1) EP2186312B1 (pt)
KR (1) KR101520123B1 (pt)
CN (1) CN101785290B (pt)
AT (1) ATE543329T1 (pt)
BR (1) BRPI0816218A8 (pt)
MX (1) MX2010002172A (pt)
RU (1) RU2464723C2 (pt)
WO (1) WO2009029605A1 (pt)

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US8170229B2 (en) * 2007-11-06 2012-05-01 James Carl Kesterson Audio privacy apparatus and method
DE102008011285A1 (de) * 2007-12-21 2009-06-25 Airbus Deutschland Gmbh Aktiver Schallblocker
TW200826062A (en) * 2008-01-15 2008-06-16 Asia Vital Components Co Ltd System of inhibiting broadband noise of communication equipment room
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US8660676B2 (en) * 2009-10-16 2014-02-25 Microsoft Corporation Mitigating the impact of nonlinear echos by dynamic range compression
US20110222696A1 (en) * 2010-03-15 2011-09-15 Nikhil Balachandran Configurable electronic device reprogrammable to modify the device frequency response
CN101958122B (zh) * 2010-09-19 2013-01-09 杭州华三通信技术有限公司 一种回声消除的方法和装置
CN102065190B (zh) * 2010-12-31 2013-08-28 杭州华三通信技术有限公司 一种回声消除方法及其装置
CN103391381B (zh) 2012-05-10 2015-05-20 中兴通讯股份有限公司 回声消除方法及装置
US20130332155A1 (en) * 2012-06-06 2013-12-12 Microsoft Corporation Double-Talk Detection for Audio Communication
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US10117021B1 (en) * 2017-03-31 2018-10-30 Polycom, Inc. Audio feedback reduction utilizing adaptive filters and nonlinear processing
JP6833616B2 (ja) * 2017-05-29 2021-02-24 株式会社トランストロン エコー抑圧装置、エコー抑圧方法及びエコー抑圧プログラム
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US20250391394A1 (en) * 2024-06-19 2025-12-25 Logitech Europe S.A. Advanced noise suppression system

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US6282176B1 (en) * 1998-03-20 2001-08-28 Cirrus Logic, Inc. Full-duplex speakerphone circuit including a supplementary echo suppressor
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JP3922997B2 (ja) * 2002-10-30 2007-05-30 沖電気工業株式会社 エコーキャンセラ
US7099458B2 (en) * 2003-12-12 2006-08-29 Motorola, Inc. Downlink activity and double talk probability detector and method for an echo canceler circuit
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US7577248B2 (en) * 2004-06-25 2009-08-18 Texas Instruments Incorporated Method and apparatus for echo cancellation, digit filter adaptation, automatic gain control and echo suppression utilizing block least mean squares
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JP4456622B2 (ja) * 2007-07-25 2010-04-28 沖電気工業株式会社 ダブルトーク検出器、ダブルトーク検出方法及びエコーキャンセラ
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US7809129B2 (en) * 2007-08-31 2010-10-05 Motorola, Inc. Acoustic echo cancellation based on noise environment

Also Published As

Publication number Publication date
WO2009029605A1 (en) 2009-03-05
US20090059821A1 (en) 2009-03-05
BRPI0816218A8 (pt) 2015-12-01
CN101785290B (zh) 2013-01-16
KR20100057019A (ko) 2010-05-28
ATE543329T1 (de) 2012-02-15
RU2464723C2 (ru) 2012-10-20
EP2186312B1 (en) 2012-01-25
US7809129B2 (en) 2010-10-05
EP2186312A1 (en) 2010-05-19
RU2010112419A (ru) 2011-10-10
KR101520123B1 (ko) 2015-05-13
MX2010002172A (es) 2010-03-18
CN101785290A (zh) 2010-07-21

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Legal Events

Date Code Title Description
B25D Requested change of name of applicant approved

Owner name: MOTOROLA SOLUTIONS, INC. (US)

B25A Requested transfer of rights approved

Owner name: MOTOROLA MOBILITY INC (US)

B25E Requested change of name of applicant rejected

Owner name: MOTOROLA MOBILITY INC (US)

Free format text: INDEFERIDO O PEDIDO DE ALTERACAO DE NOME CONTIDO NA PETICAO 20130041746 DE 16/05/2013, DEVIDO A AUSENCIA DE GUIA DE RECOLHIMENTO RELATIVA AO SERVICO.

B25G Requested change of headquarter approved

Owner name: MOTOROLA MOBILITY INC (US)

B25A Requested transfer of rights approved

Owner name: MOTOROLA MOBILITY LLC (US)

B25L Entry of change of name and/or headquarter and transfer of application, patent and certificate of addition of invention: publication cancelled

Owner name: MOTOROLA MOBILITY LLC (US)

B25D Requested change of name of applicant approved

Owner name: MOTOROLA MOBILITY LLC (US)

B06F Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]
B06U Preliminary requirement: requests with searches performed by other patent offices: procedure suspended [chapter 6.21 patent gazette]
B11B Dismissal acc. art. 36, par 1 of ipl - no reply within 90 days to fullfil the necessary requirements