NO304858B1 - Detection of voice-activity - Google Patents

Detection of voice-activity


Publication number
NO304858B1 NO903936A NO903936A NO304858B1 NO 304858 B1 NO304858 B1 NO 304858B1 NO 903936 A NO903936 A NO 903936A NO 903936 A NO903936 A NO 903936A NO 304858 B1 NO304858 B1 NO 304858B1
Prior art keywords
input signal
voice activity
activity detection
Prior art date
Application number
Other languages
Norwegian (no)
Other versions
NO903936L (en
NO903936D0 (en
Daniel Kenneth Freeman
Ivan Boyd
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
Priority to GB888805795A priority Critical patent/GB8805795D0/en
Priority to GB888813346A priority patent/GB8813346D0/en
Priority to GB888820105A priority patent/GB8820105D0/en
Priority to PCT/GB1989/000247 priority patent/WO1989008910A1/en
Application filed by British Telecomm filed Critical British Telecomm
Publication of NO903936D0 publication Critical patent/NO903936D0/en
Publication of NO903936L publication Critical patent/NO903936L/en
Publication of NO304858B1 publication Critical patent/NO304858B1/en



    • G10L25/00Speech or voice analysis techniques not restricted to a single one of groups G10L15/00-G10L21/00
    • 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


The first aspect provides a voice activity detection appts. for receiving an input signal, estimating the noise signal component of the input signal and continually forming a measure M of the spectral similarity between a portion of the input signal and the noise signal. A circuit is provided to compare a parameter derived from the measure M with a threshold value T to produce an output to indicate the presence, or absence, of speech depending on whether, or not, that value is exceeded. A second aspect covers voice activity detection appts. which continually forms a spectral distortion measure and carries out a comparison.
NO903936A 1988-03-11 1990-09-10 Detection of voice-activity NO304858B1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB888805795A GB8805795D0 (en) 1988-03-11 1988-03-11 Voice activity detector
GB888813346A GB8813346D0 (en) 1988-06-06 1988-06-06 Voice activity detection
GB888820105A GB8820105D0 (en) 1988-08-24 1988-08-24 Voice activity detection
PCT/GB1989/000247 WO1989008910A1 (en) 1988-03-11 1989-03-10 Voice activity detection

Publications (3)

Publication Number Publication Date
NO903936D0 NO903936D0 (en) 1990-09-10
NO903936L NO903936L (en) 1990-11-09
NO304858B1 true NO304858B1 (en) 1999-02-22



Family Applications (2)

Application Number Title Priority Date Filing Date
NO903936A NO304858B1 (en) 1988-03-11 1990-09-10 Detection of voice-activity
NO982568A NO982568D0 (en) 1988-03-11 1998-06-04 Detection of voice-activity

Family Applications After (1)

Application Number Title Priority Date Filing Date
NO982568A NO982568D0 (en) 1988-03-11 1998-06-04 Detection of voice-activity

Country Status (16)

Country Link
EP (2) EP0335521B1 (en)
JP (2) JP3321156B2 (en)
KR (1) KR0161258B1 (en)
AU (1) AU608432B2 (en)
BR (1) BR8907308A (en)
CA (1) CA1335003C (en)
DE (4) DE68910859T2 (en)
DK (1) DK175478B1 (en)
ES (2) ES2188588T3 (en)
FI (2) FI110726B (en)
HK (1) HK135896A (en)
IE (1) IE61863B1 (en)
NO (2) NO304858B1 (en)
NZ (1) NZ228290A (en)
PT (1) PT89978B (en)
WO (1) WO1989008910A1 (en)

Families Citing this family (33)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2643593B2 (en) * 1989-11-28 1997-08-20 日本電気株式会社 Voice modem signal identification circuit
CA2040025A1 (en) * 1990-04-09 1991-10-10 Hideki Satoh Speech detection apparatus with influence of input level and noise reduced
US5241692A (en) * 1991-02-19 1993-08-31 Motorola, Inc. Interference reduction system for a speech recognition device
FR2697101B1 (en) * 1992-10-21 1994-11-25 Sextant Avionique A speech detection.
SE470577B (en) * 1993-01-29 1994-09-19 Ericsson Telefon Ab L M Method and apparatus for encoding and / or decoding background sounds
JPH06332492A (en) * 1993-05-19 1994-12-02 Matsushita Electric Ind Co Ltd Method and device for voice detection
SE501305C2 (en) * 1993-05-26 1995-01-09 Ericsson Telefon Ab L M Method and apparatus for discriminating between stationary and non-stationary signals
EP0633658A3 (en) * 1993-07-06 1996-01-17 Hughes Aircraft Co Voice activated transmission coupled AGC circuit.
IN184794B (en) * 1993-09-14 2000-09-30 British Telecomm Voice activity detector
SE501981C2 (en) * 1993-11-02 1995-07-03 Ericsson Telefon Ab L M Method and apparatus for discriminating between stationary and non-stationary signals
US5742734A (en) * 1994-08-10 1998-04-21 Qualcomm Incorporated Encoding rate selection in a variable rate vocoder
FR2727236B1 (en) * 1994-11-22 1996-12-27 Alcatel Mobile Comm France Voice activity detection
WO1996034382A1 (en) * 1995-04-28 1996-10-31 Northern Telecom Limited Methods and apparatus for distinguishing speech intervals from noise intervals in audio signals
GB2306010A (en) * 1995-10-04 1997-04-23 Univ Wales Medicine A method of classifying signals
FR2739995B1 (en) * 1995-10-13 1997-12-12 Massaloux Dominique Method and device creation of comfort noise in a digital speech transmission system
US5794199A (en) * 1996-01-29 1998-08-11 Texas Instruments Incorporated Method and system for improved discontinuous speech transmission
EP0909442B1 (en) * 1996-07-03 2002-10-09 BRITISH TELECOMMUNICATIONS public limited company Voice activity detector
US6618701B2 (en) * 1999-04-19 2003-09-09 Motorola, Inc. Method and system for noise suppression using external voice activity detection
DE10052626A1 (en) * 2000-10-24 2002-05-02 Alcatel Sa Adaptive noise estimator
CN1617606A (en) * 2003-11-12 2005-05-18 皇家飞利浦电子股份有限公司 Method and device for transmitting non voice data in voice channel
US7155388B2 (en) * 2004-06-30 2006-12-26 Motorola, Inc. Method and apparatus for characterizing inhalation noise and calculating parameters based on the characterization
US7139701B2 (en) * 2004-06-30 2006-11-21 Motorola, Inc. Method for detecting and attenuating inhalation noise in a communication system
FI20045315A (en) 2004-08-30 2006-03-01 Nokia Corp Detection of voice activity in an audio signal
US8708702B2 (en) * 2004-09-16 2014-04-29 Lena Foundation Systems and methods for learning using contextual feedback
US8775168B2 (en) * 2006-08-10 2014-07-08 Stmicroelectronics Asia Pacific Pte, Ltd. Yule walker based low-complexity voice activity detector in noise suppression systems
US8175871B2 (en) 2007-09-28 2012-05-08 Qualcomm Incorporated Apparatus and method of noise and echo reduction in multiple microphone audio systems
US8954324B2 (en) 2007-09-28 2015-02-10 Qualcomm Incorporated Multiple microphone voice activity detector
US8223988B2 (en) 2008-01-29 2012-07-17 Qualcomm Incorporated Enhanced blind source separation algorithm for highly correlated mixtures
US8275136B2 (en) 2008-04-25 2012-09-25 Nokia Corporation Electronic device speech enhancement
US8244528B2 (en) 2008-04-25 2012-08-14 Nokia Corporation Method and apparatus for voice activity determination
WO2009130388A1 (en) 2008-04-25 2009-10-29 Nokia Corporation Calibrating multiple microphones
ES2371619B1 (en) * 2009-10-08 2012-08-08 Telefónica, S.A. Voice segment detection procedure.
WO2011049516A1 (en) * 2009-10-19 2011-04-28 Telefonaktiebolaget Lm Ericsson (Publ) Detector and method for voice activity detection

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3509281A (en) * 1966-09-29 1970-04-28 Ibm Voicing detection system
US4052568A (en) * 1976-04-23 1977-10-04 Communications Satellite Corporation Digital voice switch
US4358738A (en) * 1976-06-07 1982-11-09 Kahn Leonard R Signal presence determination method for use in a contaminated medium
JPS6244732B2 (en) * 1979-08-31 1987-09-22 Nippon Denki Kk
JPS6245730B2 (en) * 1982-12-22 1987-09-29 Nippon Electric Co
EP0127718B1 (en) * 1983-06-07 1987-03-18 International Business Machines Corporation Process for activity detection in a voice transmission system
JPH036689B2 (en) * 1984-10-17 1991-01-30 Sharp Kk

Also Published As

Publication number Publication date
NO903936L (en) 1990-11-09
ES2188588T3 (en) 2003-07-01
PT89978A (en) 1989-11-10
DK215690D0 (en) 1990-09-07
KR0161258B1 (en) 1999-03-20
FI110726B1 (en)
AU3355489A (en) 1989-10-05
AU608432B2 (en) 1991-03-28
EP0335521A1 (en) 1989-10-04
EP0548054A3 (en) 1994-01-12
CA1335003C (en) 1995-03-28
PT89978B (en) 1995-03-01
DK215690A (en) 1990-09-07
DE68910859T2 (en) 1994-12-08
DK175478B1 (en) 2004-11-08
NO982568L (en) 1990-11-09
FI904410D0 (en)
NZ228290A (en) 1992-01-29
FI20010933A (en) 2001-05-04
JP3423906B2 (en) 2003-07-07
KR900700993A (en) 1990-08-17
FI115328B (en) 2005-04-15
JPH03504283A (en) 1991-09-19
IE890774L (en) 1989-09-11
IE61863B1 (en) 1994-11-30
FI110726B (en) 2003-03-14
JP3321156B2 (en) 2002-09-03
FI904410A0 (en) 1990-09-07
DE68910859D1 (en) 1994-01-05
JP2000148172A (en) 2000-05-26
WO1989008910A1 (en) 1989-09-21
NO982568D0 (en) 1998-06-04
HK135896A (en) 1996-08-02
EP0548054A2 (en) 1993-06-23
ES2047664T3 (en) 1994-03-01
NO903936D0 (en) 1990-09-10
DE68929442D1 (en) 2003-01-23
DE68929442T2 (en) 2003-10-02
BR8907308A (en) 1991-03-19
EP0548054B1 (en) 2002-12-11
EP0335521B1 (en) 1993-11-24
FI115328B1 (en)

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