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

Families Citing this family (70)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3046203B2 (ja) * 1994-05-18 2000-05-29 三菱電機株式会社 ハンズフリー通話装置
SE505156C2 (sv) * 1995-01-30 1997-07-07 Ericsson Telefon Ab L M Förfarande för bullerundertryckning genom spektral subtraktion
DE19521258A1 (de) * 1995-06-10 1996-12-12 Philips Patentverwaltung Spracherkennungssystem
JP3639352B2 (ja) * 1995-06-28 2005-04-20 富士通株式会社 波動解析方法及びその装置
US6772182B1 (en) 1995-12-08 2004-08-03 The United States Of America As Represented By The Secretary Of The Navy Signal processing method for improving the signal-to-noise ratio of a noise-dominated channel and a matched-phase noise filter for implementing the same
SE9700772D0 (sv) * 1997-03-03 1997-03-03 Ericsson Telefon Ab L M A high resolution post processing method for a speech decoder
FR2761800A1 (fr) * 1997-04-02 1998-10-09 Scanera Sc Dispositif de transmission de voix et telephone le mettant en oeuvre
EP0802699A3 (en) * 1997-07-16 1998-02-25 Phonak Ag Method for electronically enlarging the distance between two acoustical/electrical transducers and hearing aid apparatus
US6766029B1 (en) 1997-07-16 2004-07-20 Phonak Ag Method for electronically selecting the dependency of an output signal from the spatial angle of acoustic signal impingement and hearing aid apparatus
FI114422B (fi) * 1997-09-04 2004-10-15 Nokia Corp Lähteen puheaktiviteetin tunnistus
US6157908A (en) * 1998-01-27 2000-12-05 Hm Electronics, Inc. Order point communication system and method
DE19812697A1 (de) * 1998-03-23 1999-09-30 Volkswagen Ag Verfahren und Einrichtung zum Betrieb einer Mikrofonanordnung, insbesondere in einem Kraftfahrzeug
WO1999052097A1 (fr) * 1998-04-02 1999-10-14 Scanera S.C. Dispositif et procede de communication
EP0995190B1 (en) * 1998-05-11 2005-08-03 Koninklijke Philips Electronics N.V. Audio coding based on determining a noise contribution from a phase change
US6549586B2 (en) * 1999-04-12 2003-04-15 Telefonaktiebolaget L M Ericsson System and method for dual microphone signal noise reduction using spectral subtraction
US7209567B1 (en) 1998-07-09 2007-04-24 Purdue Research Foundation Communication system with adaptive noise suppression
RU2148505C1 (ru) * 1999-02-17 2000-05-10 Закрытое акционерное общество "НЕЙРОКОМ" Способ идентификации факта речевой активности оператора
EP1035752A1 (en) 1999-03-05 2000-09-13 Phonak Ag Method for shaping the spatial reception amplification characteristic of a converter arrangement and converter arrangement
DE19942868A1 (de) * 1999-09-08 2001-03-15 Volkswagen Ag Verfahren zum Betrieb einer Mehrfachmikrofonanordnung in einem Kraftfahrzeug sowie Mehrfachmikrofonanordnung selbst
EP1089092A1 (en) * 1999-10-01 2001-04-04 Baggermaatschappij Boskalis B.V. Method and apparatus for measuring physical parameters from the phase and amplitude histories of an acoustic signal
US6243322B1 (en) * 1999-11-05 2001-06-05 Wavemakers Research, Inc. Method for estimating the distance of an acoustic signal
JP2001166025A (ja) 1999-12-14 2001-06-22 Matsushita Electric Ind Co Ltd 音源の方向推定方法および収音方法およびその装置
US6668062B1 (en) * 2000-05-09 2003-12-23 Gn Resound As FFT-based technique for adaptive directionality of dual microphones
US7246058B2 (en) * 2001-05-30 2007-07-17 Aliph, Inc. Detecting voiced and unvoiced speech using both acoustic and nonacoustic sensors
US8280072B2 (en) 2003-03-27 2012-10-02 Aliphcom, Inc. Microphone array with rear venting
US20070233479A1 (en) * 2002-05-30 2007-10-04 Burnett Gregory C Detecting voiced and unvoiced speech using both acoustic and nonacoustic sensors
US20030179888A1 (en) * 2002-03-05 2003-09-25 Burnett Gregory C. Voice activity detection (VAD) devices and methods for use with noise suppression systems
US8019091B2 (en) * 2000-07-19 2011-09-13 Aliphcom, Inc. Voice activity detector (VAD) -based multiple-microphone acoustic noise suppression
AU2001295016A1 (en) * 2000-09-01 2002-03-13 Sri International, Inc. Probabilistic alert correlation
US20020099541A1 (en) * 2000-11-21 2002-07-25 Burnett Gregory C. Method and apparatus for voiced speech excitation function determination and non-acoustic assisted feature extraction
GB2375698A (en) * 2001-02-07 2002-11-20 Canon Kk Audio signal processing apparatus
WO2002098169A1 (en) * 2001-05-30 2002-12-05 Aliphcom Detecting voiced and unvoiced speech using both acoustic and nonacoustic sensors
US8452023B2 (en) 2007-05-25 2013-05-28 Aliphcom Wind suppression/replacement component for use with electronic systems
US20030095674A1 (en) * 2001-11-20 2003-05-22 Tokheim Corporation Microphone system for the fueling environment
JP3940662B2 (ja) * 2001-11-22 2007-07-04 株式会社東芝 音響信号処理方法及び音響信号処理装置及び音声認識装置
US7315623B2 (en) * 2001-12-04 2008-01-01 Harman Becker Automotive Systems Gmbh Method for supressing surrounding noise in a hands-free device and hands-free device
TW200305854A (en) * 2002-03-27 2003-11-01 Aliphcom Inc Microphone and voice activity detection (VAD) configurations for use with communication system
US7457426B2 (en) * 2002-06-14 2008-11-25 Phonak Ag Method to operate a hearing device and arrangement with a hearing device
DK1881738T3 (da) * 2002-06-14 2009-06-29 Phonak Ag Fremgangsmåde til drift af et höreapparat og en anordning med et höreapparat
US6874796B2 (en) * 2002-12-04 2005-04-05 George A. Mercurio Sulky with buck-bar
US9066186B2 (en) 2003-01-30 2015-06-23 Aliphcom Light-based detection for acoustic applications
TW200425763A (en) * 2003-01-30 2004-11-16 Aliphcom Inc Acoustic vibration sensor
WO2004077090A1 (en) * 2003-02-25 2004-09-10 Oticon A/S Method for detection of own voice activity in a communication device
US9099094B2 (en) 2003-03-27 2015-08-04 Aliphcom Microphone array with rear venting
EP1473964A3 (en) * 2003-05-02 2006-08-09 Samsung Electronics Co., Ltd. Microphone array, method to process signals from this microphone array and speech recognition method and system using the same
DE102004005998B3 (de) * 2004-02-06 2005-05-25 Ruwisch, Dietmar, Dr. Verfahren und Vorrichtung zur Separierung von Schallsignalen
WO2005109951A1 (en) * 2004-05-05 2005-11-17 Deka Products Limited Partnership Angular discrimination of acoustical or radio signals
US20060140416A1 (en) * 2004-12-23 2006-06-29 Phonak Ag Active hearing protection system and method
US20060140415A1 (en) * 2004-12-23 2006-06-29 Phonak Method and system for providing active hearing protection
US20060262104A1 (en) * 2005-05-19 2006-11-23 Sullivan Darius M Systems and methods for distinguishing contact-induced plate vibrations from acoustic noise-induced plate vibrations
JP4912036B2 (ja) * 2006-05-26 2012-04-04 富士通株式会社 指向性集音装置、指向性集音方法、及びコンピュータプログラム
JP4367484B2 (ja) * 2006-12-25 2009-11-18 ソニー株式会社 音声信号処理装置、音声信号処理方法及び撮像装置
CN101983402B (zh) * 2008-09-16 2012-06-27 松下电器产业株式会社 声音分析装置、方法、系统、合成装置、及校正规则信息生成装置、方法
US8818802B2 (en) * 2008-10-10 2014-08-26 Spansion Llc Real-time data pattern analysis system and method of operation thereof
KR101611464B1 (ko) * 2008-10-10 2016-04-11 스펜션 엘엘씨 데이터 패턴 분석 방법 및 분석 시스템
FR2948484B1 (fr) * 2009-07-23 2011-07-29 Parrot Procede de filtrage des bruits lateraux non-stationnaires pour un dispositif audio multi-microphone, notamment un dispositif telephonique "mains libres" pour vehicule automobile
DE102009029367B4 (de) * 2009-09-11 2012-01-12 Dietmar Ruwisch Verfahren und Vorrichtung zur Analyse und Abstimmung akustischer Eigenschaften einer Kfz-Freisprecheinrichtung
CN102111697B (zh) * 2009-12-28 2015-03-25 歌尔声学股份有限公司 一种麦克风阵列降噪控制方法及装置
JP5493850B2 (ja) * 2009-12-28 2014-05-14 富士通株式会社 信号処理装置、マイクロホン・アレイ装置、信号処理方法、および信号処理プログラム
JP5593852B2 (ja) 2010-06-01 2014-09-24 ソニー株式会社 音声信号処理装置、音声信号処理方法
US9531344B2 (en) * 2011-02-26 2016-12-27 Nec Corporation Signal processing apparatus, signal processing method, storage medium
US8818800B2 (en) * 2011-07-29 2014-08-26 2236008 Ontario Inc. Off-axis audio suppressions in an automobile cabin
US9258645B2 (en) * 2012-12-20 2016-02-09 2236008 Ontario Inc. Adaptive phase discovery
GB2516314B (en) * 2013-07-19 2017-03-08 Canon Kk Method and apparatus for sound sources localization with improved secondary sources localization
WO2015048254A1 (en) * 2013-09-25 2015-04-02 Robert Bosch Gmbh Speech detection circuit and method
RU2618940C1 (ru) * 2013-12-19 2017-05-11 Телефонактиеболагет Л М Эрикссон (Пабл) Оценка фонового шума в звуковых сигналах
US10013981B2 (en) 2015-06-06 2018-07-03 Apple Inc. Multi-microphone speech recognition systems and related techniques
US9865265B2 (en) 2015-06-06 2018-01-09 Apple Inc. Multi-microphone speech recognition systems and related techniques
CN110415718B (zh) * 2019-09-05 2020-11-03 腾讯科技（深圳）有限公司 信号生成的方法、基于人工智能的语音识别方法及装置
CN115881158A (zh) * 2022-11-24 2023-03-31 南京大鱼半导体有限公司 一种音频信号处理方法、装置、设备及存储介质

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US112430A (en) * 1871-03-07 Improvement in machines for cutting files
US4112430A (en) * 1977-06-01 1978-09-05 The United States Of America As Represented By The Secretary Of The Navy Beamformer for wideband signals
US4333170A (en) * 1977-11-21 1982-06-01 Northrop Corporation Acoustical detection and tracking system
US4653102A (en) * 1985-11-05 1987-03-24 Position Orientation Systems Directional microphone system
US4918732A (en) * 1986-01-06 1990-04-17 Motorola, Inc. Frame comparison method for word recognition in high noise environments
JPH01118900A (ja) * 1987-11-01 1989-05-11 Ricoh Co Ltd 雑音抑圧装置
US4912767A (en) * 1988-03-14 1990-03-27 International Business Machines Corporation Distributed noise cancellation system
CA2011775C (en) * 1989-03-10 1995-06-27 Yutaka Kaneda Method of detecting acoustic signal
US5212764A (en) * 1989-04-19 1993-05-18 Ricoh Company, Ltd. Noise eliminating apparatus and speech recognition apparatus using the same
GB2239971B (en) * 1989-12-06 1993-09-29 Ca Nat Research Council System for separating speech from background noise
EP0459363B1 (en) * 1990-05-28 1997-08-06 Matsushita Electric Industrial Co., Ltd. Voice signal coding system
EP0472356B1 (en) * 1990-08-16 1994-03-30 Fujitsu Ten Limited Speech recognition apparatus for a vehicle, using a microphone arrangement to determine the seat from which a command is generated
JPH05134694A (ja) * 1991-11-15 1993-05-28 Sony Corp 音声認識装置
US5400409A (en) * 1992-12-23 1995-03-21 Daimler-Benz Ag Noise-reduction method for noise-affected voice channels

Also Published As

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

Similar Documents

Publication Publication Date Title
ES2107635T3 (es) Procedimiento de reduccion de ruido acustico en una señal de voz.
CA2812620C (en) Acoustic diffusion generator
MX2018008890A (es) Aparato y método para codificar o decodificar una señal multi-canal utilizando sincronización de control de entramado.
BR9604984A (pt) Sistema intensificador de um par de sinais de áudio estéreo esquerdo e direito, processo de gerar sinais de saìda estéreo esquerdo e direito, e gravação de som estéreo.
PT977463E (pt) Metodo de processamento para a localizacao de imagem acustica para sinais audio para os ouvidos esquerdo e direito
KR960701577A (ko) 압축 방법 및 장치, 전송 방법, 압축된 멀티-채널 음성 신호 확장 방법 및 장치, 및 압축된 멀티-채널 음성 신호용 기록 매체(Method and apparatus for compressing, method for transmitting, and method and apparatus for expanding compressed multi-channel sound signals, and recording medium for compressed multi-channel sound signals)
DK463982A (da) Hoereapparat
DK0632944T3 (da) Fremgangsmåde til at sende eller lagre digitaliserede multikanallydsignaler
ES2034922T1 (es) Dispositivo para el enmascaramiento de sonido.
ES2144031T3 (es) Aparato de reconocimiento de voz.
ATE182713T1 (de) Folien-schallabsorber
KR880001168A (ko) 입체 음향 배플
ES2090350T3 (es) Microtelefono supresor de ruidos.
KR960039979A (ko) 음성다중 시스템을 적용한 디지탈 오디오 부호화기
ES2156273T3 (es) Cuantificacion de los parametros espectrales para un codificado eficaz de la palabra, utilizando una matriz de prediccion escindida.
AU2016257763B2 (en) Acoustical diffusion manifold
DE3876113D1 (de) Tonfrequenzausgangsverstaerker.
ES515967A0 (es) Procedimiento para la transmision de senales acusticas comprimidas en banda de frecuencia, protegidas contra las escuchas.
NO950026L (no) Forbindelseselement for forbindelse av plateformede veggelementer
FR2608343B1 (fr) Procede d'egalisation de la reponse amplitude/frequence d'un ensemble transducteur electro-acoustique, ensemble transducteur correspondant
ES422269A1 (es) Un generador de senales en audio.
KR950034203A (ko) 다채널 디지탈 오디오의 비트할당방법 및 회로
GB2107908A (en) Electronic warning system
JPS53129026A (en) Acoustic transducer
ES2110899B1 (es) Procedimiento para el calculo de la distancia o disimilitud entre una señal de voz y una señal de referencia, para ser utilizado por sistema de reconocimiento del habla, y dispositivo para la realizacion del mismo.

Legal Events

Date Code Title Description
FG2A Definitive protection

Ref document number: 557166

Country of ref document: ES