ES2107635T3 - Procedimiento de reduccion de ruido acustico en una señal de voz. - Google Patents

Procedimiento de reduccion de ruido acustico en una señal de voz.

Info

Publication number
ES2107635T3
ES2107635T3 ES93400346T ES93400346T ES2107635T3 ES 2107635 T3 ES2107635 T3 ES 2107635T3 ES 93400346 T ES93400346 T ES 93400346T ES 93400346 T ES93400346 T ES 93400346T ES 2107635 T3 ES2107635 T3 ES 2107635T3
Authority
ES
Spain
Prior art keywords
angle
spectrum
arrival
signal
frequency channels
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.)
Expired - Lifetime
Application number
ES93400346T
Other languages
English (en)
Inventor
Francois Robbe
Luc Dartois
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 Lucent SAS
Original Assignee
Alcatel Alsthom Compagnie Generale dElectricite
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 Alsthom Compagnie Generale dElectricite filed Critical Alcatel Alsthom Compagnie Generale dElectricite
Application granted granted Critical
Publication of ES2107635T3 publication Critical patent/ES2107635T3/es
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
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S3/00—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic or electromagnetic waves, or particle emission, not having a directional significance, are being received
    • G01S3/80—Direction-finders for determining the direction from which infrasonic, sonic, ultrasonic or electromagnetic waves, or particle emission, not having a directional significance, are being received using ultrasonic, sonic or infrasonic waves
    • G01S3/802—Systems for determining direction or deviation from predetermined direction
    • G01S3/808—Systems for determining direction or deviation from predetermined direction using transducers spaced apart and measuring phase or time difference between signals therefrom, i.e. path-difference systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers
    • H04R3/005—Circuits for transducers for combining the signals of two or more microphones

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Health & Medical Sciences (AREA)
  • Signal Processing (AREA)
  • Audiology, Speech & Language Pathology (AREA)
  • Otolaryngology (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computational Linguistics (AREA)
  • Quality & Reliability (AREA)
  • General Health & Medical Sciences (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Noise Elimination (AREA)
  • Fire Alarms (AREA)
  • Alarm Systems (AREA)
  • Fire-Detection Mechanisms (AREA)
  • Measurement Of Mechanical Vibrations Or Ultrasonic Waves (AREA)
  • Amplifiers (AREA)
  • Heat Treatment Of Articles (AREA)
  • Nonmetallic Welding Materials (AREA)
  • Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Reduction Or Emphasis Of Bandwidth Of Signals (AREA)

Abstract

SEGUN LA INVENCION, EL PROCESO CONSISTE EN: CONVERTIR CICLICAMENTE POR TRANSFORMADA DE FOURIER SEÑALES DIGITALES, QUE RESULTAN DE LA CONVERSIONES ANALOGICAS-DIGITALES DE SEÑALES EMITIDAS POR DOS MICROFONOS ALEJADOS DE UNA DISTANCIA FIJA Y RECIBEN DICHA SEÑAL SONORA, EN DOS SERIES DE DATOS DISCRETOS, SIENDO REPRESENTATIVO CADA DATO DISCRETO DE DICHAS SERIES DE LA ENERGIA Y DE LA FASE DE UN CANAL DE FRECUENCIA DEL ESPECTRO DE DICHA SEÑAL SONORA; DETERMINAR EL ANGULO DE LLEGADA DOMINANTE DE DICHA SEÑAL SONORA A PARTIR DE LAS DIFERENCIAS DE FASE ENTRE LOS DATOS DISCRETOS QUE CORRESPONDEN A LOS MISMOS CANALES DE FRECUENCIA DE DICHAS SERIES CORRESPONDIENDO DICHO ANGULO DE LLEGADA DOMINANTE AL ANGULO DE LLEGADA DE DICHA SEÑAL DE PALABRA; OBTENER UN ESPECTRO INSTANTANEO DE DICHA SEÑAL SONORA: PONER AL DIA UN ESPECTRO DE RUIDO COMPARANDO, PARA CADA SEÑAL DE FRECUENCIA DE DICHO ESPECTRO INSTANTANEO, EL VALOR ABSOLUTO DE LA DIFERENCIA ENTRE DICHO ANGULO DE LLEGADA DOMINANTE Y EL ANGULO DE LLEGADA DELCANAL DE FRECUENCIA CONSIDERADO CON UN VALOR DE UMBRAL DE TOLERANCIA, SIENDO PUESTAS AL DIA LAS ENERGIAS DE DICHOS CANALES DE FRECUENCIA DE DICHO ESPECTRO DE RUIDO MEDIANTE ENERGIAS DE LOS CANALES DE FRECUENCIA DE DICHO ESPECTRO INSTANTANEO CUYO VALOR ABSOLUTO DE LA DIFERENCIA ENTRE DICHO ANGULO DE LLEGADA DOMINANTE Y EL ANGULO DE LLEGADA DE ESTOS CANALES DE FRECUENCIA ES SUPERIOR A DICHO VALOR DE UMBRAL DE TOLERANCIA; SUSTRAER DICHO ESPECTRO DE RUIDO PUESTO AL DIA DE DICHO ESPECTRO INSTANTANEO PARA OBTENER UN ESPECTRO DE DICHA SEÑAL DE PALABRA.
ES93400346T 1992-02-18 1993-02-11 Procedimiento de reduccion de ruido acustico en una señal de voz. Expired - Lifetime ES2107635T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR9201819A FR2687496B1 (fr) 1992-02-18 1992-02-18 Procede de reduction de bruit acoustique dans un signal de parole.

Publications (1)

Publication Number Publication Date
ES2107635T3 true ES2107635T3 (es) 1997-12-01

Family

ID=9426753

Family Applications (1)

Application Number Title Priority Date Filing Date
ES93400346T Expired - Lifetime ES2107635T3 (es) 1992-02-18 1993-02-11 Procedimiento de reduccion de ruido acustico en una señal de voz.

Country Status (11)

Country Link
US (1) US5539859A (es)
EP (1) EP0557166B1 (es)
AT (1) ATE159373T1 (es)
AU (1) AU662199B2 (es)
DE (1) DE69314514T2 (es)
DK (1) DK0557166T3 (es)
ES (1) ES2107635T3 (es)
FI (1) FI104526B (es)
FR (1) FR2687496B1 (es)
GR (1) GR3025804T3 (es)
NZ (1) NZ245850A (es)

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Also Published As

Publication number Publication date
DE69314514D1 (de) 1997-11-20
EP0557166B1 (fr) 1997-10-15
FR2687496A1 (fr) 1993-08-20
AU662199B2 (en) 1995-08-24
NZ245850A (en) 1995-11-27
US5539859A (en) 1996-07-23
FI930655A0 (fi) 1993-02-15
FR2687496B1 (fr) 1994-04-01
ATE159373T1 (de) 1997-11-15
EP0557166A1 (fr) 1993-08-25
DK0557166T3 (da) 1997-11-03
GR3025804T3 (en) 1998-03-31
AU3285493A (en) 1993-08-19
DE69314514T2 (de) 1998-02-12
FI930655A7 (fi) 1993-08-19
FI104526B (fi) 2000-02-15

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