PH12017500031A1 - Estimation of background noise in audio signals - Google Patents

Estimation of background noise in audio signals

Info

Publication number
PH12017500031A1
PH12017500031A1 PH12017500031A PH12017500031A PH12017500031A1 PH 12017500031 A1 PH12017500031 A1 PH 12017500031A1 PH 12017500031 A PH12017500031 A PH 12017500031A PH 12017500031 A PH12017500031 A PH 12017500031A PH 12017500031 A1 PH12017500031 A1 PH 12017500031A1
Authority
PH
Philippines
Prior art keywords
audio signal
linear prediction
background noise
signal segment
estimation
Prior art date
Application number
PH12017500031A
Other languages
English (en)
Inventor
Martin Sehlstedt
Original Assignee
ERICSSON TELEFON AB L M (publ)
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 (publ) filed Critical ERICSSON TELEFON AB L M (publ)
Publication of PH12017500031A1 publication Critical patent/PH12017500031A1/en

Links

Classifications

    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • G10L19/0204Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders using subband decomposition
    • G10L19/0208Subband vocoders
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/02Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using spectral analysis, e.g. transform vocoders or subband vocoders
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208Noise filtering
    • G10L21/0216Noise filtering characterised by the method used for estimating noise
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0316Speech enhancement, e.g. noise reduction or echo cancellation by changing the amplitude
    • G10L21/0324Details of processing therefor
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L21/00Speech or voice signal processing techniques to produce another audible or non-audible signal, e.g. visual or tactile, in order to modify its quality or its intelligibility
    • G10L21/02Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/038Speech enhancement, e.g. noise reduction or echo cancellation using band spreading techniques
    • G10L21/0388Details of processing therefor
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/03Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/03Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters
    • G10L25/12Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00 characterised by the type of extracted parameters the extracted parameters being prediction coefficients
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/78Detection of presence or absence of voice signals
    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10LSPEECH ANALYSIS TECHNIQUES OR SPEECH SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING TECHNIQUES; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/012Comfort noise or silence coding

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Signal Processing (AREA)
  • Acoustics & Sound (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Noise Elimination (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)
PH12017500031A 2014-07-29 2017-01-05 Estimation of background noise in audio signals PH12017500031A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201462030121P 2014-07-29 2014-07-29
PCT/SE2015/050770 WO2016018186A1 (en) 2014-07-29 2015-07-01 Estimation of background noise in audio signals

Publications (1)

Publication Number Publication Date
PH12017500031A1 true PH12017500031A1 (en) 2017-05-15

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
PH12017500031A PH12017500031A1 (en) 2014-07-29 2017-01-05 Estimation of background noise in audio signals

Country Status (19)

Country Link
US (6) US9870780B2 (enExample)
EP (3) EP3175458B1 (enExample)
JP (3) JP6208377B2 (enExample)
KR (3) KR102267986B1 (enExample)
CN (3) CN106575511B (enExample)
BR (1) BR112017001643B1 (enExample)
CA (1) CA2956531C (enExample)
DK (1) DK3582221T3 (enExample)
ES (3) ES2869141T3 (enExample)
HU (1) HUE037050T2 (enExample)
MX (3) MX385944B (enExample)
MY (1) MY178131A (enExample)
NZ (1) NZ728080A (enExample)
PH (1) PH12017500031A1 (enExample)
PL (2) PL3309784T3 (enExample)
PT (1) PT3309784T (enExample)
RU (3) RU2665916C2 (enExample)
WO (1) WO2016018186A1 (enExample)
ZA (2) ZA201708141B (enExample)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
PL3084763T3 (pl) 2013-12-19 2019-03-29 Telefonaktiebolaget Lm Ericsson (Publ) Szacowanie szumów tła w sygnałach audio
CN105261375B (zh) * 2014-07-18 2018-08-31 中兴通讯股份有限公司 激活音检测的方法及装置
EP3175458B1 (en) 2014-07-29 2017-12-27 Telefonaktiebolaget LM Ericsson (publ) Estimation of background noise in audio signals
KR102446392B1 (ko) * 2015-09-23 2022-09-23 삼성전자주식회사 음성 인식이 가능한 전자 장치 및 방법
CN105897455A (zh) * 2015-11-16 2016-08-24 乐视云计算有限公司 用于检测功能管理配置服务器运营的方法、合法客户端、cdn节点及系统
DE102018206689A1 (de) * 2018-04-30 2019-10-31 Sivantos Pte. Ltd. Verfahren zur Rauschunterdrückung in einem Audiosignal
US10991379B2 (en) * 2018-06-22 2021-04-27 Babblelabs Llc Data driven audio enhancement
CN110110437B (zh) * 2019-05-07 2023-08-29 中汽研(天津)汽车工程研究院有限公司 一种基于相关区间不确定性理论的汽车高频噪声预测方法
CN111554314B (zh) * 2020-05-15 2024-08-16 腾讯科技(深圳)有限公司 噪声检测方法、装置、终端及存储介质
CN111863016B (zh) * 2020-06-15 2022-09-02 云南国土资源职业学院 一种天文时序信号的噪声估计方法
CN113539283B (zh) * 2020-12-03 2024-07-16 腾讯科技(深圳)有限公司 基于人工智能的音频处理方法、装置、电子设备及存储介质

Family Cites Families (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5297213A (en) * 1992-04-06 1994-03-22 Holden Thomas W System and method for reducing noise
IT1257065B (it) * 1992-07-31 1996-01-05 Sip Codificatore a basso ritardo per segnali audio, utilizzante tecniche di analisi per sintesi.
JP3685812B2 (ja) * 1993-06-29 2005-08-24 ソニー株式会社 音声信号送受信装置
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.
FR2720850B1 (fr) * 1994-06-03 1996-08-14 Matra Communication Procédé de codage de parole à prédiction linéaire.
US5742734A (en) * 1994-08-10 1998-04-21 Qualcomm Incorporated Encoding rate selection in a variable rate vocoder
US5659622A (en) * 1995-11-13 1997-08-19 Motorola, Inc. Method and apparatus for suppressing noise in a communication system
FI100840B (fi) * 1995-12-12 1998-02-27 Nokia Mobile Phones Ltd Kohinanvaimennin ja menetelmä taustakohinan vaimentamiseksi kohinaises ta puheesta sekä matkaviestin
US6782361B1 (en) * 1999-06-18 2004-08-24 Mcgill University Method and apparatus for providing background acoustic noise during a discontinued/reduced rate transmission mode of a voice transmission system
US6691082B1 (en) * 1999-08-03 2004-02-10 Lucent Technologies Inc Method and system for sub-band hybrid coding
JP2001236085A (ja) * 2000-02-25 2001-08-31 Matsushita Electric Ind Co Ltd 音声区間検出装置、定常雑音区間検出装置、非定常雑音区間検出装置、及び雑音区間検出装置
US7254532B2 (en) * 2000-04-28 2007-08-07 Deutsche Telekom Ag Method for making a voice activity decision
DE10026872A1 (de) * 2000-04-28 2001-10-31 Deutsche Telekom Ag Verfahren zur Berechnung einer Sprachaktivitätsentscheidung (Voice Activity Detector)
US7136810B2 (en) * 2000-05-22 2006-11-14 Texas Instruments Incorporated Wideband speech coding system and method
US6691085B1 (en) * 2000-10-18 2004-02-10 Nokia Mobile Phones Ltd. Method and system for estimating artificial high band signal in speech codec using voice activity information
JP2002258897A (ja) * 2001-02-27 2002-09-11 Fujitsu Ltd 雑音抑圧装置
KR100399057B1 (ko) * 2001-08-07 2003-09-26 한국전자통신연구원 이동통신 시스템의 음성 활성도 측정 장치 및 그 방법
FR2833103B1 (fr) * 2001-12-05 2004-07-09 France Telecom Systeme de detection de parole dans le bruit
US7206740B2 (en) * 2002-01-04 2007-04-17 Broadcom Corporation Efficient excitation quantization in noise feedback coding with general noise shaping
US7065486B1 (en) * 2002-04-11 2006-06-20 Mindspeed Technologies, Inc. Linear prediction based noise suppression
CA2454296A1 (en) * 2003-12-29 2005-06-29 Nokia Corporation Method and device for speech enhancement in the presence of background noise
US7454010B1 (en) 2004-11-03 2008-11-18 Acoustic Technologies, Inc. Noise reduction and comfort noise gain control using bark band weiner filter and linear attenuation
JP4551817B2 (ja) * 2005-05-20 2010-09-29 Okiセミコンダクタ株式会社 ノイズレベル推定方法及びその装置
US20070078645A1 (en) * 2005-09-30 2007-04-05 Nokia Corporation Filterbank-based processing of speech signals
RU2317595C1 (ru) * 2006-10-30 2008-02-20 ГОУ ВПО "Белгородский государственный университет" Способ обнаружения пауз в речевых сигналах и устройство его реализующее
RU2417459C2 (ru) * 2006-11-15 2011-04-27 ЭлДжи ЭЛЕКТРОНИКС ИНК. Способ и устройство для декодирования аудиосигнала
RU2469419C2 (ru) * 2007-03-05 2012-12-10 Телефонактиеболагет Лм Эрикссон (Пабл) Способ и устройство для управления сглаживанием стационарного фонового шума
EP2162880B1 (en) * 2007-06-22 2014-12-24 VoiceAge Corporation Method and device for estimating the tonality of a sound signal
US8489396B2 (en) * 2007-07-25 2013-07-16 Qnx Software Systems Limited Noise reduction with integrated tonal noise reduction
KR101230183B1 (ko) * 2008-07-14 2013-02-15 광운대학교 산학협력단 오디오 신호의 상태결정 장치
GB2466672B (en) 2009-01-06 2013-03-13 Skype Speech coding
JP5513138B2 (ja) * 2009-01-28 2014-06-04 矢崎総業株式会社 基板
US8244523B1 (en) * 2009-04-08 2012-08-14 Rockwell Collins, Inc. Systems and methods for noise reduction
JP5460709B2 (ja) * 2009-06-04 2014-04-02 パナソニック株式会社 音響信号処理装置および方法
DE102009034238A1 (de) 2009-07-22 2011-02-17 Daimler Ag Statorsegment und Stator eines Hybrid- oder Elektrofahrzeuges
DE102009034235A1 (de) 2009-07-22 2011-02-17 Daimler Ag Stator eines Hybrid- oder Elektrofahrzeuges, Statorträger
JP5712220B2 (ja) 2009-10-19 2015-05-07 テレフオンアクチーボラゲット エル エム エリクソン(パブル) 音声活動検出のための方法および背景推定器
EP2491548A4 (en) 2009-10-19 2013-10-30 Ericsson Telefon Ab L M VOICE ACTIVITY METHOD AND DETECTOR FOR SPEECH ENCODER
CN102136271B (zh) * 2011-02-09 2012-07-04 华为技术有限公司 舒适噪声生成器、方法及回声抵消装置
ES2535609T3 (es) * 2011-02-14 2015-05-13 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Codificador de audio con estimación de ruido de fondo durante fases activas
SG11201500595TA (en) * 2012-09-11 2015-04-29 Ericsson Telefon Ab L M Generation of comfort noise
CN103050121A (zh) * 2012-12-31 2013-04-17 北京迅光达通信技术有限公司 线性预测语音编码方法及语音合成方法
CN104347067B (zh) * 2013-08-06 2017-04-12 华为技术有限公司 一种音频信号分类方法和装置
CN103440871B (zh) * 2013-08-21 2016-04-13 大连理工大学 一种语音中瞬态噪声抑制的方法
US9570093B2 (en) * 2013-09-09 2017-02-14 Huawei Technologies Co., Ltd. Unvoiced/voiced decision for speech processing
MX355091B (es) * 2013-10-18 2018-04-04 Fraunhofer Ges Forschung Concepto para codificar una señal de audio y decodificar una señal de audio usando información de conformación espectral relacionada con la voz.
EP3175458B1 (en) * 2014-07-29 2017-12-27 Telefonaktiebolaget LM Ericsson (publ) Estimation of background noise in audio signals
US11114104B2 (en) * 2019-06-18 2021-09-07 International Business Machines Corporation Preventing adversarial audio attacks on digital assistants
KR20230103130A (ko) * 2021-12-31 2023-07-07 에스케이하이닉스 주식회사 메모리 컨트롤러 및 그 동작 방법

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PL3309784T3 (pl) 2020-02-28
PT3309784T (pt) 2019-11-21
BR112017001643B1 (pt) 2021-01-12
EP3309784A1 (en) 2018-04-18
CN112927724B (zh) 2024-03-22
US9870780B2 (en) 2018-01-16
KR20170026545A (ko) 2017-03-08
US20170069331A1 (en) 2017-03-09
NZ743390A (en) 2021-03-26
KR102012325B1 (ko) 2019-08-20
RU2665916C2 (ru) 2018-09-04
RU2018129139A3 (enExample) 2019-12-20
JP6788086B2 (ja) 2020-11-18
CN106575511B (zh) 2021-02-23
US12347446B2 (en) 2025-07-01
CN112927724A (zh) 2021-06-08
CN112927725A (zh) 2021-06-08
RU2018129139A (ru) 2019-03-14
PL3582221T3 (pl) 2021-07-26
RU2020100879A3 (enExample) 2021-10-13
EP3582221B1 (en) 2021-02-24
JP6600337B2 (ja) 2019-10-30
HUE037050T2 (hu) 2018-08-28
ES2758517T3 (es) 2020-05-05
ES2664348T3 (es) 2018-04-19
US20180158465A1 (en) 2018-06-07
NZ728080A (en) 2018-08-31
JP2018041083A (ja) 2018-03-15
US20190267017A1 (en) 2019-08-29
ZA201708141B (en) 2019-09-25
US11114105B2 (en) 2021-09-07
MX365694B (es) 2019-06-11
KR20190097321A (ko) 2019-08-20
EP3175458A1 (en) 2017-06-07
MX385944B (es) 2025-03-18
WO2016018186A1 (en) 2016-02-04
US10347265B2 (en) 2019-07-09
CA2956531C (en) 2020-03-24
RU2760346C2 (ru) 2021-11-24
MX2019005799A (es) 2019-08-12
MX2017000805A (es) 2017-05-04
US20230215447A1 (en) 2023-07-06
CA2956531A1 (en) 2016-02-04
RU2020100879A (ru) 2021-07-14
CN106575511A (zh) 2017-04-19
ES2869141T3 (es) 2021-10-25
EP3309784B1 (en) 2019-09-04
RU2017106163A3 (enExample) 2018-08-28
US20210366496A1 (en) 2021-11-25
EP3175458B1 (en) 2017-12-27
JP2020024435A (ja) 2020-02-13
KR20180100452A (ko) 2018-09-10
DK3582221T3 (da) 2021-04-19
BR112017001643A2 (pt) 2018-01-30
JP6208377B2 (ja) 2017-10-04
ZA201903140B (en) 2020-09-30
RU2713852C2 (ru) 2020-02-07
RU2017106163A (ru) 2018-08-28
US11636865B2 (en) 2023-04-25
EP3582221A1 (en) 2019-12-18
US20250285630A1 (en) 2025-09-11
CN112927725B (zh) 2025-02-18
MY178131A (en) 2020-10-05
MX2021010373A (es) 2023-01-18
KR101895391B1 (ko) 2018-09-07
KR102267986B1 (ko) 2021-06-22
JP2017515138A (ja) 2017-06-08

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