EP1103956A3 - Exponential reduction of echo and noise during speech pauses - Google Patents

Exponential reduction of echo and noise during speech pauses Download PDF

Info

Publication number
EP1103956A3
EP1103956A3 EP00124577A EP00124577A EP1103956A3 EP 1103956 A3 EP1103956 A3 EP 1103956A3 EP 00124577 A EP00124577 A EP 00124577A EP 00124577 A EP00124577 A EP 00124577A EP 1103956 A3 EP1103956 A3 EP 1103956A3
Authority
EP
European Patent Office
Prior art keywords
echo
noise during
during speech
speech pauses
exponential reduction
Prior art date
Legal status (The legal status 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 status listed.)
Granted
Application number
EP00124577A
Other languages
German (de)
French (fr)
Other versions
EP1103956A2 (en
EP1103956B1 (en
Inventor
Hans Jürgen Matt
Michael Walker
Michael Maurer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alcatel CIT SA
Alcatel Lucent SAS
Original Assignee
Alcatel CIT SA
Alcatel SA
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 Alcatel CIT SA, Alcatel SA filed Critical Alcatel CIT SA
Publication of EP1103956A2 publication Critical patent/EP1103956A2/en
Publication of EP1103956A3 publication Critical patent/EP1103956A3/en
Application granted granted Critical
Publication of EP1103956B1 publication Critical patent/EP1103956B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • 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
    • G10L21/00—Speech 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
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • 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
    • G10L19/00—Speech 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
    • G10L19/012—Comfort noise or silence coding
    • 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
    • G10L21/00—Speech 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
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G10L2021/02082—Noise filtering the noise being echo, reverberation of the speech
    • 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
    • G10L21/00—Speech 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
    • G10L21/02—Speech enhancement, e.g. noise reduction or echo cancellation
    • G10L21/0208—Noise filtering
    • G10L21/0216—Noise filtering characterised by the method used for estimating noise
    • G10L2021/02168—Noise filtering characterised by the method used for estimating noise the estimation exclusively taking place during speech pauses

Landscapes

  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Computational Linguistics (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Quality & Reliability (AREA)
  • Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Telephone Function (AREA)

Abstract

The exponential echo (E) and noise (N) reduction system samples the received signal regularly and has a speech pause detector (SPD) to scale down the cancellation constant (a0(k)) used to weight the stored best estimate of noise power spectral density (g(S/N)) during pauses.
EP00124577A 1999-11-27 2000-11-10 Exponential reduction of echo and noise during speech pauses Expired - Lifetime EP1103956B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19957221 1999-11-27
DE19957221A DE19957221A1 (en) 1999-11-27 1999-11-27 Exponential echo and noise reduction during pauses in speech

Publications (3)

Publication Number Publication Date
EP1103956A2 EP1103956A2 (en) 2001-05-30
EP1103956A3 true EP1103956A3 (en) 2001-12-05
EP1103956B1 EP1103956B1 (en) 2005-06-08

Family

ID=7930611

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00124577A Expired - Lifetime EP1103956B1 (en) 1999-11-27 2000-11-10 Exponential reduction of echo and noise during speech pauses

Country Status (6)

Country Link
US (1) US6999920B1 (en)
EP (1) EP1103956B1 (en)
JP (1) JP2001202100A (en)
KR (1) KR20010051980A (en)
AT (1) ATE297590T1 (en)
DE (2) DE19957221A1 (en)

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DE10030926A1 (en) * 2000-06-24 2002-01-03 Alcatel Sa Interference-dependent adaptive echo cancellation
US7428223B2 (en) * 2001-09-26 2008-09-23 Siemens Corporation Method for background noise reduction and performance improvement in voice conferencing over packetized networks
DE10150519B4 (en) * 2001-10-12 2014-01-09 Hewlett-Packard Development Co., L.P. Method and arrangement for speech processing
US7158572B2 (en) * 2002-02-14 2007-01-02 Tellabs Operations, Inc. Audio enhancement communication techniques
DE10216322B4 (en) * 2002-04-13 2004-07-15 Güttler, Gerhard, Prof. Dr. votes converter
US7366295B2 (en) * 2003-08-14 2008-04-29 John David Patton Telephone signal generator and methods and devices using the same
US8394114B2 (en) * 2003-09-26 2013-03-12 Medtronic, Inc. Surgical connection apparatus and methods
US20060104460A1 (en) * 2004-11-18 2006-05-18 Motorola, Inc. Adaptive time-based noise suppression
JP4283212B2 (en) 2004-12-10 2009-06-24 インターナショナル・ビジネス・マシーンズ・コーポレーション Noise removal apparatus, noise removal program, and noise removal method
US7599357B1 (en) * 2004-12-14 2009-10-06 At&T Corp. Method and apparatus for detecting and correcting electrical interference in a conference call
US7599719B2 (en) 2005-02-14 2009-10-06 John D. Patton Telephone and telephone accessory signal generator and methods and devices using the same
WO2006089089A2 (en) 2005-02-16 2006-08-24 Applera Corporation Refractive index matching in capillary illumination
JP4562573B2 (en) * 2005-03-30 2010-10-13 ローランド株式会社 Howling prevention device
US8509450B2 (en) * 2010-08-23 2013-08-13 Cambridge Silicon Radio Limited Dynamic audibility enhancement
KR102413692B1 (en) 2015-07-24 2022-06-27 삼성전자주식회사 Apparatus and method for caculating acoustic score for speech recognition, speech recognition apparatus and method, and electronic device
KR102192678B1 (en) 2015-10-16 2020-12-17 삼성전자주식회사 Apparatus and method for normalizing input data of acoustic model, speech recognition apparatus
GB2551499B (en) * 2016-06-17 2021-05-12 Toshiba Kk A speech processing system and speech processing method
CN107274909A (en) * 2017-06-16 2017-10-20 深圳市华域无线技术股份有限公司 A kind of active the machine audio removing method in speech recognition
CN111128213B (en) * 2019-12-10 2022-09-27 展讯通信（上海）有限公司 Noise suppression method and system for processing in different frequency bands

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US786760A (en) * 1904-06-15 1905-04-04 Hartshorn Bros Couch.
US5533133A (en) * 1993-03-26 1996-07-02 Hughes Aircraft Company Noise suppression in digital voice communications systems
US5537509A (en) * 1990-12-06 1996-07-16 Hughes Electronics Comfort noise generation for digital communication systems

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL8000361A (en) * 1980-01-21 1981-08-17 Philips Nv DEVICE AND METHOD FOR GENERATING A VOICE SIGNAL
JPS57212831A (en) * 1981-06-24 1982-12-27 Kokusai Denshin Denwa Co Ltd <Kdd> Echo controlling system
US4630304A (en) * 1985-07-01 1986-12-16 Motorola, Inc. Automatic background noise estimator for a noise suppression system
JP3080641B2 (en) * 1990-07-24 2000-08-28 株式会社東芝 Echo canceller
US5369711A (en) * 1990-08-31 1994-11-29 Bellsouth Corporation Automatic gain control for a headset
DE4229912A1 (en) * 1992-09-08 1994-03-10 Sel Alcatel Ag Method for improving the transmission properties of an electroacoustic system
JP3152171B2 (en) * 1997-06-16 2001-04-03 日本電気株式会社 Adaptive filter, step size control method, and recording medium recording program
US6549587B1 (en) * 1999-09-20 2003-04-15 Broadcom Corporation Voice and data exchange over a packet based network with timing recovery

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US786760A (en) * 1904-06-15 1905-04-04 Hartshorn Bros Couch.
US5537509A (en) * 1990-12-06 1996-07-16 Hughes Electronics Comfort noise generation for digital communication systems
US5533133A (en) * 1993-03-26 1996-07-02 Hughes Aircraft Company Noise suppression in digital voice communications systems

Also Published As

Publication number Publication date
US6999920B1 (en) 2006-02-14
EP1103956A2 (en) 2001-05-30
KR20010051980A (en) 2001-06-25
JP2001202100A (en) 2001-07-27
DE50010504D1 (en) 2005-07-14
DE19957221A1 (en) 2001-05-31
ATE297590T1 (en) 2005-06-15
EP1103956B1 (en) 2005-06-08

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