SE9704552L - Noise reduction method and apparatus - Google Patents

Noise reduction method and apparatus

Info

Publication number
SE9704552L
SE9704552L SE9704552A SE9704552A SE9704552L SE 9704552 L SE9704552 L SE 9704552L SE 9704552 A SE9704552 A SE 9704552A SE 9704552 A SE9704552 A SE 9704552A SE 9704552 L SE9704552 L SE 9704552L
Authority
SE
Sweden
Prior art keywords
noise
noise reduction
input signal
measured
level
Prior art date
Application number
SE9704552A
Other languages
English (en)
Other versions
SE9704552D0 (sv
SE515674C2 (sv
Inventor
Fisseha Mekuria
Hans Svensson
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
Priority to SE9704552A priority Critical patent/SE515674C2/sv
Publication of SE9704552D0 publication Critical patent/SE9704552D0/sv
Priority to MYPI98005191A priority patent/MY123365A/en
Priority to US09/205,342 priority patent/US6230123B1/en
Priority to AU17935/99A priority patent/AU1793599A/en
Priority to PCT/SE1998/002225 priority patent/WO1999030415A2/en
Publication of SE9704552L publication Critical patent/SE9704552L/sv
Publication of SE515674C2 publication Critical patent/SE515674C2/sv

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/32—Automatic control in amplifiers having semiconductor devices the control being dependent upon ambient noise level or sound level
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/341—Muting when no signals or only weak signals are present
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/78—Detection of presence or absence of voice signals
    • G10L2025/783—Detection of presence or absence of voice signals based on threshold decision

Landscapes

  • Noise Elimination (AREA)
  • Telephone Function (AREA)
  • Mobile Radio Communication Systems (AREA)
SE9704552A 1997-12-05 1997-12-05 Apparat och metod för brusreducering SE515674C2 (sv)

Priority Applications (5)

Application Number Priority Date Filing Date Title
SE9704552A SE515674C2 (sv) 1997-12-05 1997-12-05 Apparat och metod för brusreducering
MYPI98005191A MY123365A (en) 1997-12-05 1998-11-14 Noise reduction method and apparatus
US09/205,342 US6230123B1 (en) 1997-12-05 1998-12-03 Noise reduction method and apparatus
AU17935/99A AU1793599A (en) 1997-12-05 1998-12-04 Noise reduction method and apparatus
PCT/SE1998/002225 WO1999030415A2 (en) 1997-12-05 1998-12-04 Noise reduction method and apparatus

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9704552A SE515674C2 (sv) 1997-12-05 1997-12-05 Apparat och metod för brusreducering

Publications (3)

Publication Number Publication Date
SE9704552D0 SE9704552D0 (sv) 1997-12-05
SE9704552L true SE9704552L (sv) 1999-06-06
SE515674C2 SE515674C2 (sv) 2001-09-24

Family

ID=20409288

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9704552A SE515674C2 (sv) 1997-12-05 1997-12-05 Apparat och metod för brusreducering

Country Status (5)

Country Link
US (1) US6230123B1 (sv)
AU (1) AU1793599A (sv)
MY (1) MY123365A (sv)
SE (1) SE515674C2 (sv)
WO (1) WO1999030415A2 (sv)

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DE19957220A1 (de) * 1999-11-27 2001-06-21 Alcatel Sa An den aktuellen Geräuschpegel adaptierte Geräuschunterdrückung
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US8619927B2 (en) 2012-05-29 2013-12-31 Magnolia Broadband Inc. System and method for discrete gain control in hybrid MIMO/RF beamforming
US8811522B2 (en) 2012-05-29 2014-08-19 Magnolia Broadband Inc. Mitigating interferences for a multi-layer MIMO system augmented by radio distribution network
US8644413B2 (en) 2012-05-29 2014-02-04 Magnolia Broadband Inc. Implementing blind tuning in hybrid MIMO RF beamforming systems
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US9343808B2 (en) 2013-02-08 2016-05-17 Magnotod Llc Multi-beam MIMO time division duplex base station using subset of radios
US8774150B1 (en) 2013-02-13 2014-07-08 Magnolia Broadband Inc. System and method for reducing side-lobe contamination effects in Wi-Fi access points
US8989103B2 (en) 2013-02-13 2015-03-24 Magnolia Broadband Inc. Method and system for selective attenuation of preamble reception in co-located WI FI access points
US9155110B2 (en) 2013-03-27 2015-10-06 Magnolia Broadband Inc. System and method for co-located and co-channel Wi-Fi access points
US20140226740A1 (en) 2013-02-13 2014-08-14 Magnolia Broadband Inc. Multi-beam co-channel wi-fi access point
US9100968B2 (en) 2013-05-09 2015-08-04 Magnolia Broadband Inc. Method and system for digital cancellation scheme with multi-beam
US9425882B2 (en) 2013-06-28 2016-08-23 Magnolia Broadband Inc. Wi-Fi radio distribution network stations and method of operating Wi-Fi RDN stations
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US8824596B1 (en) 2013-07-31 2014-09-02 Magnolia Broadband Inc. System and method for uplink transmissions in time division MIMO RDN architecture
US9497781B2 (en) 2013-08-13 2016-11-15 Magnolia Broadband Inc. System and method for co-located and co-channel Wi-Fi access points
US9088898B2 (en) 2013-09-12 2015-07-21 Magnolia Broadband Inc. System and method for cooperative scheduling for co-located access points
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CN109473123B (zh) * 2018-12-05 2022-05-31 百度在线网络技术（北京）有限公司 语音活动检测方法及装置
CN110556128B (zh) * 2019-10-15 2021-02-09 出门问问信息科技有限公司 一种语音活动性检测方法、设备及计算机可读存储介质

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Also Published As

Publication number Publication date
SE9704552D0 (sv) 1997-12-05
SE515674C2 (sv) 2001-09-24
US6230123B1 (en) 2001-05-08
AU1793599A (en) 1999-06-28
WO1999030415A3 (en) 1999-08-12
MY123365A (en) 2006-05-31
WO1999030415A2 (en) 1999-06-17

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