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ITMI932018A1 - Metodo di riduzione del rumore, in particolare per riconoscimento automatico del parlato, e filtro atto ad implementare lo stesso - Google Patents

Metodo di riduzione del rumore, in particolare per riconoscimento automatico del parlato, e filtro atto ad implementare lo stesso

Info

Publication number
ITMI932018A1
ITMI932018A1 IT93MI002018A ITMI932018A ITMI932018A1 IT MI932018 A1 ITMI932018 A1 IT MI932018A1 IT 93MI002018 A IT93MI002018 A IT 93MI002018A IT MI932018 A ITMI932018 A IT MI932018A IT MI932018 A1 ITMI932018 A1 IT MI932018A1
Authority
IT
Italy
Prior art keywords
same
reduction method
noise reduction
speech recognition
time interval
Prior art date
Application number
IT93MI002018A
Other languages
English (en)
Inventor
Clara Pelaez
Original Assignee
Alcatel Italia
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 Italia filed Critical Alcatel Italia
Priority to ITMI932018A priority Critical patent/IT1272653B/it
Publication of ITMI932018A0 publication Critical patent/ITMI932018A0/it
Priority to EP94113124A priority patent/EP0644526A1/en
Priority to FI944343A priority patent/FI944343L/fi
Priority to US08/309,015 priority patent/US5577161A/en
Publication of ITMI932018A1 publication Critical patent/ITMI932018A1/it
Application granted granted Critical
Publication of IT1272653B publication Critical patent/IT1272653B/it

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

Landscapes

  • Engineering & Computer Science (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Multimedia (AREA)
  • Telephone Function (AREA)
  • Noise Elimination (AREA)
  • Compression, Expansion, Code Conversion, And Decoders (AREA)

Abstract

La presente invenzione si riferisce ad un metodo di riduzione del rumore, in particolare per riconoscimento del parlato, e ad un filtro atto ad implementare lo stesso, in cui la stima dell'inviluppo spettrale dell'ampiezza del segnale di parlato in un intervallo di tempo predeterminato viene calcolata secondo la formula:E(A|X, O; H1) * p(H1|X, O) + E(A|X, O; HO) * p(HO|X, O),dove X è l'inviluppo spettrale dell'ampiezza del segnale corrotto da rumore in detto intervallo di tempo, O è l'inviluppo spettrale della potenza del rumore in detto intervallo, HO indica l'evento statistico corrispondente al fatto che detto intervallo di tempo sia di tipo non-speech, e H1 indica l'evento statistico corrispondente al fatto che detto intervallo di tempo sia di tipo speech.
ITMI932018A 1993-09-20 1993-09-20 Metodo di riduzione del rumore, in particolare per riconoscimento automatico del parlato, e filtro atto ad implementare lo stesso IT1272653B (it)

Priority Applications (4)

Application Number Priority Date Filing Date Title
ITMI932018A IT1272653B (it) 1993-09-20 1993-09-20 Metodo di riduzione del rumore, in particolare per riconoscimento automatico del parlato, e filtro atto ad implementare lo stesso
EP94113124A EP0644526A1 (en) 1993-09-20 1994-08-23 Noise reduction method, in particular for automatic speech recognition, and filter for implementing the method
FI944343A FI944343L (fi) 1993-09-20 1994-09-19 Kohinanvaimennusmenetelmä, erityisesti automaattista puheentunnistusta varten, ja suodatin menetelmän toteuttamiseksi
US08/309,015 US5577161A (en) 1993-09-20 1994-09-20 Noise reduction method and filter for implementing the method particularly useful in telephone communications systems

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ITMI932018A IT1272653B (it) 1993-09-20 1993-09-20 Metodo di riduzione del rumore, in particolare per riconoscimento automatico del parlato, e filtro atto ad implementare lo stesso

Publications (3)

Publication Number Publication Date
ITMI932018A0 ITMI932018A0 (it) 1993-09-20
ITMI932018A1 true ITMI932018A1 (it) 1995-03-20
IT1272653B IT1272653B (it) 1997-06-26

Family

ID=11366923

Family Applications (1)

Application Number Title Priority Date Filing Date
ITMI932018A IT1272653B (it) 1993-09-20 1993-09-20 Metodo di riduzione del rumore, in particolare per riconoscimento automatico del parlato, e filtro atto ad implementare lo stesso

Country Status (4)

Country Link
US (1) US5577161A (it)
EP (1) EP0644526A1 (it)
FI (1) FI944343L (it)
IT (1) IT1272653B (it)

Families Citing this family (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3453898B2 (ja) * 1995-02-17 2003-10-06 ソニー株式会社 音声信号の雑音低減方法及び装置
DE19521258A1 (de) * 1995-06-10 1996-12-12 Philips Patentverwaltung Spracherkennungssystem
JP3591068B2 (ja) * 1995-06-30 2004-11-17 ソニー株式会社 音声信号の雑音低減方法
JP3452443B2 (ja) * 1996-03-25 2003-09-29 三菱電機株式会社 騒音下音声認識装置及び騒音下音声認識方法
US5963899A (en) * 1996-08-07 1999-10-05 U S West, Inc. Method and system for region based filtering of speech
KR100250561B1 (ko) * 1996-08-29 2000-04-01 니시무로 타이죠 잡음소거기 및 이 잡음소거기를 사용한 통신장치
US6098038A (en) * 1996-09-27 2000-08-01 Oregon Graduate Institute Of Science & Technology Method and system for adaptive speech enhancement using frequency specific signal-to-noise ratio estimates
US6092040A (en) * 1997-11-21 2000-07-18 Voran; Stephen Audio signal time offset estimation algorithm and measuring normalizing block algorithms for the perceptually-consistent comparison of speech signals
US6097776A (en) * 1998-02-12 2000-08-01 Cirrus Logic, Inc. Maximum likelihood estimation of symbol offset
US6144735A (en) * 1998-03-12 2000-11-07 Westell Technologies, Inc. Filters for a digital subscriber line system for voice communication over a telephone line
US6115466A (en) * 1998-03-12 2000-09-05 Westell Technologies, Inc. Subscriber line system having a dual-mode filter for voice communications over a telephone line
US6351731B1 (en) 1998-08-21 2002-02-26 Polycom, Inc. Adaptive filter featuring spectral gain smoothing and variable noise multiplier for noise reduction, and method therefor
US6453285B1 (en) 1998-08-21 2002-09-17 Polycom, Inc. Speech activity detector for use in noise reduction system, and methods therefor
US6122610A (en) * 1998-09-23 2000-09-19 Verance Corporation Noise suppression for low bitrate speech coder
US6327564B1 (en) * 1999-03-05 2001-12-04 Matsushita Electric Corporation Of America Speech detection using stochastic confidence measures on the frequency spectrum
JP4344964B2 (ja) * 1999-06-01 2009-10-14 ソニー株式会社 画像処理装置および画像処理方法
US6349278B1 (en) * 1999-08-04 2002-02-19 Ericsson Inc. Soft decision signal estimation
US6137880A (en) * 1999-08-27 2000-10-24 Westell Technologies, Inc. Passive splitter filter for digital subscriber line voice communication for complex impedance terminations
EP1244094A1 (de) * 2001-03-20 2002-09-25 Swissqual AG Verfahren und Vorrichtung zur Bestimmung eines Qualitätsmasses eines Audiosignals
US7289626B2 (en) * 2001-05-07 2007-10-30 Siemens Communications, Inc. Enhancement of sound quality for computer telephony systems
US7200561B2 (en) * 2001-08-23 2007-04-03 Nippon Telegraph And Telephone Corporation Digital signal coding and decoding methods and apparatuses and programs therefor
JP4765461B2 (ja) * 2005-07-27 2011-09-07 日本電気株式会社 雑音抑圧システムと方法及びプログラム
US9437212B1 (en) * 2013-12-16 2016-09-06 Marvell International Ltd. Systems and methods for suppressing noise in an audio signal for subbands in a frequency domain based on a closed-form solution
CN109815877B (zh) * 2019-01-17 2020-10-02 北京邮电大学 一种卫星信号的降噪处理方法及装置

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IL84948A0 (en) * 1987-12-25 1988-06-30 D S P Group Israel Ltd Noise reduction system
DE3925589C2 (de) * 1989-08-02 1994-03-17 Blaupunkt Werke Gmbh Verfahren und Anordnung zur Störbefreiung von Sprachsignalen
US5097510A (en) * 1989-11-07 1992-03-17 Gs Systems, Inc. Artificial intelligence pattern-recognition-based noise reduction system for speech processing
KR950013552B1 (ko) * 1990-05-28 1995-11-08 마쯔시다덴기산교 가부시기가이샤 음성신호처리장치
US5432859A (en) * 1993-02-23 1995-07-11 Novatel Communications Ltd. Noise-reduction system
US6060891A (en) * 1997-02-11 2000-05-09 Micron Technology, Inc. Probe card for semiconductor wafers and method and system for testing wafers

Also Published As

Publication number Publication date
EP0644526A1 (en) 1995-03-22
FI944343A0 (fi) 1994-09-19
FI944343L (fi) 1995-03-21
ITMI932018A0 (it) 1993-09-20
US5577161A (en) 1996-11-19
IT1272653B (it) 1997-06-26

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Legal Events

Date Code Title Description
0001 Granted
TA Fee payment date (situation as of event date), data collected since 19931001

Effective date: 19980831