FI961158A0 - Röstdetektor - Google Patents

Röstdetektor

Info

Publication number
FI961158A0
FI961158A0 FI961158A FI961158A FI961158A0 FI 961158 A0 FI961158 A0 FI 961158A0 FI 961158 A FI961158 A FI 961158A FI 961158 A FI961158 A FI 961158A FI 961158 A0 FI961158 A0 FI 961158A0
Authority
FI
Finland
Prior art keywords
input
speech
updating
buffer
stored
Prior art date
Application number
FI961158A
Other languages
English (en)
Finnish (fi)
Other versions
FI961158A (sv
FI118195B (sv
Inventor
Paul Alexander Barrett
Original Assignee
British Telecomm
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
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=27235491&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=FI961158(A0) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority claimed from GB939324967A external-priority patent/GB9324967D0/en
Priority claimed from GB9412451A external-priority patent/GB9412451D0/en
Application filed by British Telecomm filed Critical British Telecomm
Publication of FI961158A publication Critical patent/FI961158A/sv
Publication of FI961158A0 publication Critical patent/FI961158A0/sv
Application granted granted Critical
Publication of FI118195B publication Critical patent/FI118195B/sv

Links

Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L25/84—Detection of presence or absence of voice signals for discriminating voice from noise
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q1/00—Details of selecting apparatus or arrangements
    • H04Q1/18—Electrical details
    • H04Q1/30—Signalling arrangements; Manipulation of signalling currents
    • H04Q1/44—Signalling arrangements; Manipulation of signalling currents using alternate current
    • H04Q1/444—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies
    • H04Q1/46—Signalling arrangements; Manipulation of signalling currents using alternate current with voice-band signalling frequencies comprising means for distinguishing between a signalling current of predetermined frequency and a complex current containing that frequency, e.g. speech current
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; 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
    • G10L2025/786—Adaptive threshold
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04M—TELEPHONIC COMMUNICATION
    • H04M19/00—Current supply arrangements for telephone systems
    • H04M19/08—Current supply arrangements for telephone systems with current supply sources at the substations
FI961158A 1993-09-14 1996-03-13 Röstdetektor FI118195B (sv)

Applications Claiming Priority (8)

Application Number Priority Date Filing Date Title
EP93307211 1993-09-14
EP93307211 1993-09-14
GB9324967 1993-12-06
GB939324967A GB9324967D0 (en) 1993-12-06 1993-12-06 Voice activity detector
GB9412451 1994-06-21
GB9412451A GB9412451D0 (en) 1994-06-21 1994-06-21 Voice activity detector
GB9401999 1994-09-14
PCT/GB1994/001999 WO1995008170A1 (en) 1993-09-14 1994-09-14 Voice activity detector

Publications (3)

Publication Number Publication Date
FI961158A FI961158A (sv) 1996-03-13
FI961158A0 true FI961158A0 (sv) 1996-03-13
FI118195B FI118195B (sv) 2007-08-15

Family

ID=27235491

Family Applications (1)

Application Number Title Priority Date Filing Date
FI961158A FI118195B (sv) 1993-09-14 1996-03-13 Röstdetektor

Country Status (23)

Country Link
US (2) US5749067A (sv)
EP (1) EP0719439B1 (sv)
JP (1) JP3224132B2 (sv)
KR (1) KR100363309B1 (sv)
CN (1) CN1064772C (sv)
AT (1) ATE182420T1 (sv)
BR (1) BR9407535A (sv)
CA (1) CA2169745C (sv)
CZ (1) CZ286743B6 (sv)
DE (1) DE69419615T2 (sv)
DK (1) DK0719439T3 (sv)
ES (1) ES2136204T3 (sv)
FI (1) FI118195B (sv)
GR (1) GR3031515T3 (sv)
HK (1) HK1014392A1 (sv)
HU (1) HU219994B (sv)
IN (1) IN184794B (sv)
MY (1) MY111134A (sv)
NO (1) NO307979B1 (sv)
NZ (1) NZ273045A (sv)
SG (1) SG48935A1 (sv)
SK (1) SK281796B6 (sv)
WO (1) WO1995008170A1 (sv)

Families Citing this family (96)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IN184794B (sv) * 1993-09-14 2000-09-30 British Telecomm
JP3522012B2 (ja) * 1995-08-23 2004-04-26 沖電気工業株式会社 コード励振線形予測符号化装置
FI100840B (sv) * 1995-12-12 1998-02-27 Nokia Mobile Phones Ltd Brusdämpare och förfarande för dämpning av bakgrundsbrus i brusigt tal samt en mobilteleapparat
AU3352997A (en) * 1996-07-03 1998-02-02 British Telecommunications Public Limited Company Voice activity detector
US6708146B1 (en) * 1997-01-03 2004-03-16 Telecommunications Research Laboratories Voiceband signal classifier
JPH10247098A (ja) * 1997-03-04 1998-09-14 Mitsubishi Electric Corp 可変レート音声符号化方法、可変レート音声復号化方法
US6531982B1 (en) 1997-09-30 2003-03-11 Sirf Technology, Inc. Field unit for use in a GPS system
US5970446A (en) 1997-11-25 1999-10-19 At&T Corp Selective noise/channel/coding models and recognizers for automatic speech recognition
US6385548B2 (en) * 1997-12-12 2002-05-07 Motorola, Inc. Apparatus and method for detecting and characterizing signals in a communication system
US6327471B1 (en) 1998-02-19 2001-12-04 Conexant Systems, Inc. Method and an apparatus for positioning system assisted cellular radiotelephone handoff and dropoff
US5991718A (en) * 1998-02-27 1999-11-23 At&T Corp. System and method for noise threshold adaptation for voice activity detection in nonstationary noise environments
US6182035B1 (en) 1998-03-26 2001-01-30 Telefonaktiebolaget Lm Ericsson (Publ) Method and apparatus for detecting voice activity
US6348744B1 (en) 1998-04-14 2002-02-19 Conexant Systems, Inc. Integrated power management module
US6453289B1 (en) 1998-07-24 2002-09-17 Hughes Electronics Corporation Method of noise reduction for speech codecs
US7711038B1 (en) 1998-09-01 2010-05-04 Sirf Technology, Inc. System and method for despreading in a spread spectrum matched filter
US7545854B1 (en) 1998-09-01 2009-06-09 Sirf Technology, Inc. Doppler corrected spread spectrum matched filter
US6693953B2 (en) 1998-09-30 2004-02-17 Skyworks Solutions, Inc. Adaptive wireless communication receiver
US6448925B1 (en) 1999-02-04 2002-09-10 Conexant Systems, Inc. Jamming detection and blanking for GPS receivers
US6606349B1 (en) 1999-02-04 2003-08-12 Sirf Technology, Inc. Spread spectrum receiver performance improvement
US6556967B1 (en) 1999-03-12 2003-04-29 The United States Of America As Represented By The National Security Agency Voice activity detector
US6577271B1 (en) 1999-03-30 2003-06-10 Sirf Technology, Inc Signal detector employing coherent integration
US6304216B1 (en) * 1999-03-30 2001-10-16 Conexant Systems, Inc. Signal detector employing correlation analysis of non-uniform and disjoint sample segments
US6618701B2 (en) * 1999-04-19 2003-09-09 Motorola, Inc. Method and system for noise suppression using external voice activity detection
US6381568B1 (en) 1999-05-05 2002-04-30 The United States Of America As Represented By The National Security Agency Method of transmitting speech using discontinuous transmission and comfort noise
US6351486B1 (en) 1999-05-25 2002-02-26 Conexant Systems, Inc. Accelerated selection of a base station in a wireless communication system
JP3929686B2 (ja) * 2000-08-14 2007-06-13 松下電器産業株式会社 音声スイッチング装置およびその方法
US6931055B1 (en) 2000-04-18 2005-08-16 Sirf Technology, Inc. Signal detector employing a doppler phase correction system
US6788655B1 (en) 2000-04-18 2004-09-07 Sirf Technology, Inc. Personal communications device with ratio counter
US6952440B1 (en) 2000-04-18 2005-10-04 Sirf Technology, Inc. Signal detector employing a Doppler phase correction system
US6714158B1 (en) 2000-04-18 2004-03-30 Sirf Technology, Inc. Method and system for data detection in a global positioning system satellite receiver
FR2808391B1 (fr) * 2000-04-28 2002-06-07 France Telecom Systeme de reception pour antenne multicapteur
US7885314B1 (en) 2000-05-02 2011-02-08 Kenneth Scott Walley Cancellation system and method for a wireless positioning system
US6778136B2 (en) 2001-12-13 2004-08-17 Sirf Technology, Inc. Fast acquisition of GPS signal
JP4201471B2 (ja) * 2000-09-12 2008-12-24 パイオニア株式会社 音声認識システム
JP4201470B2 (ja) * 2000-09-12 2008-12-24 パイオニア株式会社 音声認識システム
US7472059B2 (en) * 2000-12-08 2008-12-30 Qualcomm Incorporated Method and apparatus for robust speech classification
WO2002052546A1 (en) * 2000-12-27 2002-07-04 Intel Corporation Voice barge-in in telephony speech recognition
US6707869B1 (en) * 2000-12-28 2004-03-16 Nortel Networks Limited Signal-processing apparatus with a filter of flexible window design
DE10121532A1 (de) * 2001-05-03 2002-11-07 Siemens Ag Verfahren und Vorrichtung zur automatischen Differenzierung und/oder Detektion akustischer Signale
JP3859462B2 (ja) * 2001-05-18 2006-12-20 株式会社東芝 予測パラメータ分析装置および予測パラメータ分析方法
KR100399057B1 (ko) * 2001-08-07 2003-09-26 한국전자통신연구원 이동통신 시스템의 음성 활성도 측정 장치 및 그 방법
US20030110029A1 (en) * 2001-12-07 2003-06-12 Masoud Ahmadi Noise detection and cancellation in communications systems
AU2003212285A1 (en) * 2002-03-08 2003-09-22 Koninklijke Kpn N.V. Method and system for measuring a system's transmission quality
US7454331B2 (en) * 2002-08-30 2008-11-18 Dolby Laboratories Licensing Corporation Controlling loudness of speech in signals that contain speech and other types of audio material
US20040064314A1 (en) * 2002-09-27 2004-04-01 Aubert Nicolas De Saint Methods and apparatus for speech end-point detection
US7146316B2 (en) * 2002-10-17 2006-12-05 Clarity Technologies, Inc. Noise reduction in subbanded speech signals
US7230955B1 (en) * 2002-12-27 2007-06-12 At & T Corp. System and method for improved use of voice activity detection
US7272552B1 (en) * 2002-12-27 2007-09-18 At&T Corp. Voice activity detection and silence suppression in a packet network
JP2004341339A (ja) * 2003-05-16 2004-12-02 Mitsubishi Electric Corp 雑音抑圧装置
IN2010KN02913A (sv) * 2003-05-28 2015-05-01 Dolby Lab Licensing Corp
US7569631B2 (en) 2003-07-16 2009-08-04 Daikin Industries, Ltd. Method for producing fluorine-containing polymer, aqueous dispersion of fluorine-containing polymer,2-acyloxycarboxylic acid derivative, and surface active agent
SG119199A1 (en) * 2003-09-30 2006-02-28 Stmicroelectronics Asia Pacfic Voice activity detector
JP4497911B2 (ja) * 2003-12-16 2010-07-07 キヤノン株式会社 信号検出装置および方法、ならびにプログラム
US20050209762A1 (en) * 2004-03-18 2005-09-22 Ford Global Technologies, Llc Method and apparatus for controlling a vehicle using an object detection system and brake-steer
FI20045315A (sv) * 2004-08-30 2006-03-01 Nokia Corp Detektering av röstaktivitet i en audiosignal
US8199933B2 (en) 2004-10-26 2012-06-12 Dolby Laboratories Licensing Corporation Calculating and adjusting the perceived loudness and/or the perceived spectral balance of an audio signal
EP1805891B1 (en) 2004-10-26 2012-05-16 Dolby Laboratories Licensing Corporation Calculating and adjusting the perceived loudness and/or the perceived spectral balance of an audio signal
JP4729927B2 (ja) * 2005-01-11 2011-07-20 ソニー株式会社 音声検出装置、自動撮像装置、および音声検出方法
BRPI0610719B1 (pt) * 2005-04-18 2015-11-24 Basf Ag preparação, processo para a produção da mesma, e, uso de preparações
US7826945B2 (en) * 2005-07-01 2010-11-02 You Zhang Automobile speech-recognition interface
DE102006032967B4 (de) * 2005-07-28 2012-04-19 S. Siedle & Söhne Telefon- und Telegrafenwerke OHG Hausanlage und Verfahren zum Betreiben einer Hausanlage
GB2430129B (en) * 2005-09-08 2007-10-31 Motorola Inc Voice activity detector and method of operation therein
KR100986957B1 (ko) 2005-12-05 2010-10-12 퀄컴 인코포레이티드 토널 컴포넌트들을 감지하는 시스템들, 방법들, 및 장치들
US8417185B2 (en) * 2005-12-16 2013-04-09 Vocollect, Inc. Wireless headset and method for robust voice data communication
US7773767B2 (en) 2006-02-06 2010-08-10 Vocollect, Inc. Headset terminal with rear stability strap
US7885419B2 (en) * 2006-02-06 2011-02-08 Vocollect, Inc. Headset terminal with speech functionality
CN101379548B (zh) 2006-02-10 2012-07-04 艾利森电话股份有限公司 语音检测器和用于其中抑制子频带的方法
US8920343B2 (en) 2006-03-23 2014-12-30 Michael Edward Sabatino Apparatus for acquiring and processing of physiological auditory signals
CN101410892B (zh) * 2006-04-04 2012-08-08 杜比实验室特许公司 改进的离散余弦变换域中的音频信号响度测量及修改
TWI517562B (zh) 2006-04-04 2016-01-11 杜比實驗室特許公司 用於將多聲道音訊信號之全面感知響度縮放一期望量的方法、裝置及電腦程式
ATE493794T1 (de) 2006-04-27 2011-01-15 Dolby Lab Licensing Corp Tonverstärkungsregelung mit erfassung von publikumsereignissen auf der basis von spezifischer lautstärke
CN101149921B (zh) * 2006-09-21 2011-08-10 展讯通信（上海）有限公司 一种静音检测方法和装置
WO2008051347A2 (en) 2006-10-20 2008-05-02 Dolby Laboratories Licensing Corporation Audio dynamics processing using a reset
US8521314B2 (en) * 2006-11-01 2013-08-27 Dolby Laboratories Licensing Corporation Hierarchical control path with constraints for audio dynamics processing
US20080147389A1 (en) * 2006-12-15 2008-06-19 Motorola, Inc. Method and Apparatus for Robust Speech Activity Detection
EP2162881B1 (en) * 2007-05-22 2013-01-23 Telefonaktiebolaget LM Ericsson (publ) Voice activity detection with improved music detection
RU2438197C2 (ru) * 2007-07-13 2011-12-27 Долби Лэборетериз Лайсенсинг Корпорейшн Обработка звуковых сигналов с использованием анализа слуховой сцены и спектральной асимметрии
US20090043577A1 (en) * 2007-08-10 2009-02-12 Ditech Networks, Inc. Signal presence detection using bi-directional communication data
US8190440B2 (en) * 2008-02-29 2012-05-29 Broadcom Corporation Sub-band codec with native voice activity detection
EP2107553B1 (en) * 2008-03-31 2011-05-18 Harman Becker Automotive Systems GmbH Method for determining barge-in
US8244528B2 (en) * 2008-04-25 2012-08-14 Nokia Corporation Method and apparatus for voice activity determination
US8611556B2 (en) * 2008-04-25 2013-12-17 Nokia Corporation Calibrating multiple microphones
US8275136B2 (en) * 2008-04-25 2012-09-25 Nokia Corporation Electronic device speech enhancement
CN101572090B (zh) * 2008-04-30 2013-03-20 向为 一种自适应多速率窄带编码方法及编码器
USD605629S1 (en) 2008-09-29 2009-12-08 Vocollect, Inc. Headset
KR101547344B1 (ko) 2008-10-31 2015-08-27 삼성전자 주식회사 음성복원장치 및 그 방법
TWI384423B (zh) * 2008-11-26 2013-02-01 Ind Tech Res Inst 以聲音事件為基礎之緊急通報方法與系統以及行為軌跡建立方法
CN101609678B (zh) 2008-12-30 2011-07-27 华为技术有限公司 信号压缩方法及其压缩装置
US8160287B2 (en) 2009-05-22 2012-04-17 Vocollect, Inc. Headset with adjustable headband
WO2011049516A1 (en) 2009-10-19 2011-04-28 Telefonaktiebolaget Lm Ericsson (Publ) Detector and method for voice activity detection
US8438659B2 (en) 2009-11-05 2013-05-07 Vocollect, Inc. Portable computing device and headset interface
FR2956539B1 (fr) * 2010-02-16 2012-03-16 Dominique Retali Procede de detection du fonctionnement d'un dispositif de transmission sans fil de signaux de voix.
US20120143604A1 (en) * 2010-12-07 2012-06-07 Rita Singh Method for Restoring Spectral Components in Denoised Speech Signals
CN102883244B (zh) * 2011-07-25 2015-09-02 开曼群岛威睿电通股份有限公司 声震防护的装置及方法
US9363603B1 (en) 2013-02-26 2016-06-07 Xfrm Incorporated Surround audio dialog balance assessment
CN111261197B (zh) * 2020-01-13 2022-11-25 中航华东光电（上海）有限公司 一种复杂噪声场景下的实时语音段落追踪方法

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4358738A (en) * 1976-06-07 1982-11-09 Kahn Leonard R Signal presence determination method for use in a contaminated medium
JPS53105303A (en) * 1977-02-25 1978-09-13 Hitachi Ltd Preprocessing system for audio recognition
JPS5850360B2 (ja) * 1978-05-12 1983-11-10 株式会社日立製作所 音声認識装置における前処理方法
JPS59115625A (ja) * 1982-12-22 1984-07-04 Nec Corp 音声検出器
US4731846A (en) * 1983-04-13 1988-03-15 Texas Instruments Incorporated Voice messaging system with pitch tracking based on adaptively filtered LPC residual signal
EP0127718B1 (fr) * 1983-06-07 1987-03-18 International Business Machines Corporation Procédé de détection d'activité dans un système de transmission de la voix
US4700392A (en) * 1983-08-26 1987-10-13 Nec Corporation Speech signal detector having adaptive threshold values
US4696039A (en) * 1983-10-13 1987-09-22 Texas Instruments Incorporated Speech analysis/synthesis system with silence suppression
JPH0748695B2 (ja) * 1986-05-23 1995-05-24 株式会社日立製作所 音声符号化方式
US5276765A (en) * 1988-03-11 1994-01-04 British Telecommunications Public Limited Company Voice activity detection
ES2188588T3 (es) * 1988-03-11 2003-07-01 British Telecomm Detector de actividad de voz.
JP2573352B2 (ja) * 1989-04-10 1997-01-22 富士通株式会社 音声検出装置
US5680508A (en) * 1991-05-03 1997-10-21 Itt Corporation Enhancement of speech coding in background noise for low-rate speech coder
IN184794B (sv) * 1993-09-14 2000-09-30 British Telecomm
US5659622A (en) * 1995-11-13 1997-08-19 Motorola, Inc. Method and apparatus for suppressing noise in a communication system

Also Published As

Publication number Publication date
JP3224132B2 (ja) 2001-10-29
WO1995008170A1 (en) 1995-03-23
DE69419615D1 (de) 1999-08-26
HUT73986A (en) 1996-10-28
BR9407535A (pt) 1997-08-26
US5749067A (en) 1998-05-05
DK0719439T3 (da) 2000-02-07
FI961158A (sv) 1996-03-13
GR3031515T3 (en) 2000-01-31
SK31896A3 (en) 1997-03-05
HU219994B (hu) 2001-10-28
CA2169745A1 (en) 1995-03-23
SG48935A1 (en) 1998-05-18
NO961032D0 (no) 1996-03-13
FI118195B (sv) 2007-08-15
AU7619894A (en) 1995-04-03
NO307979B1 (no) 2000-06-26
CN1064772C (zh) 2001-04-18
NO961032L (no) 1996-03-13
ES2136204T3 (es) 1999-11-16
EP0719439A1 (en) 1996-07-03
EP0719439B1 (en) 1999-07-21
CA2169745C (en) 2000-05-16
CZ67896A3 (en) 1996-07-17
MY111134A (en) 1999-08-30
KR100363309B1 (ko) 2003-02-17
DE69419615T2 (de) 2000-05-25
HK1014392A1 (en) 1999-09-24
HU9600641D0 (en) 1996-05-28
SK281796B6 (sk) 2001-08-06
IN184794B (sv) 2000-09-30
NZ273045A (en) 1996-11-26
KR960705303A (ko) 1996-10-09
CN1130952A (zh) 1996-09-11
JPH09502814A (ja) 1997-03-18
AU673776B2 (en) 1996-11-21
ATE182420T1 (de) 1999-08-15
US6061647A (en) 2000-05-09
CZ286743B6 (en) 2000-06-14

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