PT89978A - DEVECTOR OF THE VOCAL ACTIVITY AND MOBILE TELEPHONE SYSTEM THAT CONTAINS IT - Google Patents

DEVECTOR OF THE VOCAL ACTIVITY AND MOBILE TELEPHONE SYSTEM THAT CONTAINS IT

Info

Publication number
PT89978A
PT89978A PT89978A PT8997889A PT89978A PT 89978 A PT89978 A PT 89978A PT 89978 A PT89978 A PT 89978A PT 8997889 A PT8997889 A PT 8997889A PT 89978 A PT89978 A PT 89978A
Authority
PT
Portugal
Prior art keywords
input signal
measure
devector
mobile telephone
telephone system
Prior art date
Application number
PT89978A
Other languages
Portuguese (pt)
Other versions
PT89978B (en
Inventor
Daniel Kennetw 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 claimed from GB888805795A external-priority patent/GB8805795D0/en
Priority claimed from GB888813346A external-priority patent/GB8813346D0/en
Priority claimed from GB888820105A external-priority patent/GB8820105D0/en
Application filed by British Telecomm filed Critical British Telecomm
Publication of PT89978A publication Critical patent/PT89978A/en
Publication of PT89978B publication Critical patent/PT89978B/en

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
    • 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
    • G10L25/84—Detection of presence or absence of voice signals for discriminating voice from noise

Abstract

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.
PT89978A 1988-03-11 1989-03-10 DEVECTOR OF THE VOCAL ACTIVITY AND MOBILE TELEPHONE SYSTEM THAT CONTAINS IT PT89978B (en)

Applications Claiming Priority (3)

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

Publications (2)

Publication Number Publication Date
PT89978A true PT89978A (en) 1989-11-10
PT89978B PT89978B (en) 1995-03-01

Family

ID=27263821

Family Applications (1)

Application Number Title Priority Date Filing Date
PT89978A PT89978B (en) 1988-03-11 1989-03-10 DEVECTOR OF THE VOCAL ACTIVITY AND MOBILE TELEPHONE SYSTEM THAT CONTAINS IT

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 (2) 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 (34)

* 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 Speech detection method.
SE470577B (en) * 1993-01-29 1994-09-19 Ericsson Telefon Ab L M Method and apparatus for encoding and / or decoding background noise
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
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 DETECTION OF VOICE ACTIVITY
GB2317084B (en) * 1995-04-28 2000-01-19 Northern Telecom Ltd 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 FOR CREATING 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
AU3352997A (en) 1996-07-03 1998-02-02 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 level 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
US7139701B2 (en) * 2004-06-30 2006-11-21 Motorola, Inc. Method for detecting and attenuating inhalation noise in a communication system
US7155388B2 (en) * 2004-06-30 2006-12-26 Motorola, Inc. Method and apparatus for characterizing inhalation noise and calculating parameters based on the characterization
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
US8954324B2 (en) * 2007-09-28 2015-02-10 Qualcomm Incorporated Multiple microphone voice activity detector
US8175871B2 (en) 2007-09-28 2012-05-08 Qualcomm Incorporated Apparatus and method of noise and echo reduction in multiple microphone audio systems
US8223988B2 (en) 2008-01-29 2012-07-17 Qualcomm Incorporated Enhanced blind source separation algorithm for highly correlated mixtures
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
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
CN108985277B (en) * 2018-08-24 2020-11-10 广东石油化工学院 Method and system for filtering background noise in power signal

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
JPS5636246A (en) * 1979-08-31 1981-04-09 Nec Corp Stereo signal demodulating circuit
JPS59115625A (en) * 1982-12-22 1984-07-04 Nec Corp Voice detector
EP0127718B1 (en) * 1983-06-07 1987-03-18 International Business Machines Corporation Process for activity detection in a voice transmission system
JPS6196817A (en) * 1984-10-17 1986-05-15 Sharp Corp Filter

Also Published As

Publication number Publication date
EP0548054A2 (en) 1993-06-23
FI110726B (en) 2003-03-14
DE68910859T2 (en) 1994-12-08
NO903936D0 (en) 1990-09-10
EP0548054B1 (en) 2002-12-11
KR900700993A (en) 1990-08-17
JP2000148172A (en) 2000-05-26
JPH03504283A (en) 1991-09-19
JP3321156B2 (en) 2002-09-03
FI904410A0 (en) 1990-09-07
IE890774L (en) 1989-09-11
AU608432B2 (en) 1991-03-28
DK215690A (en) 1990-09-07
ES2047664T3 (en) 1994-03-01
NO316610B1 (en) 2004-03-08
CA1335003C (en) 1995-03-28
KR0161258B1 (en) 1999-03-20
NO304858B1 (en) 1999-02-22
EP0335521A1 (en) 1989-10-04
FI20010933A (en) 2001-05-04
BR8907308A (en) 1991-03-19
DE68929442D1 (en) 2003-01-23
NO903936L (en) 1990-11-09
ES2188588T3 (en) 2003-07-01
NZ228290A (en) 1992-01-29
FI115328B (en) 2005-04-15
AU3355489A (en) 1989-10-05
JP3423906B2 (en) 2003-07-07
HK135896A (en) 1996-08-02
EP0335521B1 (en) 1993-11-24
DK175478B1 (en) 2004-11-08
NO982568L (en) 1990-11-09
DK215690D0 (en) 1990-09-07
EP0548054A3 (en) 1994-01-12
IE61863B1 (en) 1994-11-30
DE68929442T2 (en) 2003-10-02
PT89978B (en) 1995-03-01
DE68910859D1 (en) 1994-01-05
WO1989008910A1 (en) 1989-09-21
NO982568D0 (en) 1998-06-04

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FG3A Patent granted, date of granting

Effective date: 19940801

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Free format text: LG ELECTRONICS INC. KR

Effective date: 20040804

MM4A Annulment/lapse due to non-payment of fees, searched and examined patent

Free format text: MAXIMUM VALIDITY LIMIT REACHED

Effective date: 20090801