WO2002103680A3 - Speaker recognition system ____________________________________ - Google Patents

Speaker recognition system ____________________________________ Download PDF

Info

Publication number
WO2002103680A3
WO2002103680A3 PCT/GB2002/002726 GB0202726W WO02103680A3 WO 2002103680 A3 WO2002103680 A3 WO 2002103680A3 GB 0202726 W GB0202726 W GB 0202726W WO 02103680 A3 WO02103680 A3 WO 02103680A3
Authority
WO
WIPO (PCT)
Prior art keywords
sample
speech
enrolled
cohort
frames
Prior art date
Application number
PCT/GB2002/002726
Other languages
French (fr)
Other versions
WO2002103680A2 (en
Inventor
Andrew Thomas Sapeluk
Original Assignee
Securivox Ltd
Andrew Thomas Sapeluk
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 GBGB0114866.7A external-priority patent/GB0114866D0/en
Application filed by Securivox Ltd, Andrew Thomas Sapeluk filed Critical Securivox Ltd
Priority to US10/481,523 priority Critical patent/US20040236573A1/en
Priority to EP02738369A priority patent/EP1399915B1/en
Priority to CA002451401A priority patent/CA2451401A1/en
Priority to AU2002311452A priority patent/AU2002311452B2/en
Priority to DE60231617T priority patent/DE60231617D1/en
Priority to KR1020037016649A priority patent/KR100917419B1/en
Publication of WO2002103680A2 publication Critical patent/WO2002103680A2/en
Publication of WO2002103680A3 publication Critical patent/WO2002103680A3/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
    • G10L17/00—Speaker identification or verification
    • G10L17/02—Preprocessing operations, e.g. segment selection; Pattern representation or modelling, e.g. based on linear discriminant analysis [LDA] or principal components; Feature selection or extraction
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L17/00—Speaker identification or verification
    • G10L17/06—Decision making techniques; Pattern matching strategies
    • G10L17/12—Score normalisation
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L17/00—Speaker identification or verification
    • G10L17/20—Pattern transformations or operations aimed at increasing system robustness, e.g. against channel noise or different working conditions

Abstract

Speaker recognition (identification and/or verification) methods and systems, in which speech models for enrolled speakers consist of sets of feature vectors representing the smoothed frequency spectrum of each of a plurality of frames and a clustering algorithm is applied to the feature vectors of the frames to obtain a reduced data set representing the original speech sample, and wherein the adjacent frames are overlapped by at least 80 %. Speech models of this type model the static components of the speech sample and exhibit temporal independence. An identifier strategy is employed in which modelling and classification processes are selected to give a false rejection rate substantially equal to zero. Each enrolled speaker is associated with a cohort of a predetermined number of other enrolled speakers and a test sample is always matched with either the claimed identity or one of its associated cohort. This makes the overall error rate of the system dependent only on the false acceptance rate, which is determined by the cohort size. The false error rate is further reduced by use of multiple parallel modelling and/or classification processes. Speech models are normalised prior to classification using a normalisation model derived from either the test speech sample or one of the enrolled speaker samples (most preferably from the claimed identity enrolment sample).
PCT/GB2002/002726 2001-06-19 2002-06-13 Speaker recognition system ____________________________________ WO2002103680A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
US10/481,523 US20040236573A1 (en) 2001-06-19 2002-06-13 Speaker recognition systems
EP02738369A EP1399915B1 (en) 2001-06-19 2002-06-13 Speaker verification
CA002451401A CA2451401A1 (en) 2001-06-19 2002-06-13 Speaker recognition system
AU2002311452A AU2002311452B2 (en) 2001-06-19 2002-06-13 Speaker recognition system
DE60231617T DE60231617D1 (en) 2001-06-19 2002-06-13 SPEAKER VERIFICATION
KR1020037016649A KR100917419B1 (en) 2001-06-19 2002-06-13 Speaker recognition systems

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GBGB0114866.7A GB0114866D0 (en) 2001-06-19 2001-06-19 Speaker recognition systems
GB0114866.7 2001-06-19
US30250101P 2001-07-02 2001-07-02
US60/302,501 2001-07-02

Publications (2)

Publication Number Publication Date
WO2002103680A2 WO2002103680A2 (en) 2002-12-27
WO2002103680A3 true WO2002103680A3 (en) 2003-03-13

Family

ID=26246204

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/002726 WO2002103680A2 (en) 2001-06-19 2002-06-13 Speaker recognition system ____________________________________

Country Status (8)

Country Link
US (1) US20040236573A1 (en)
EP (1) EP1399915B1 (en)
CN (1) CN100377209C (en)
AT (1) ATE426234T1 (en)
AU (1) AU2002311452B2 (en)
CA (1) CA2451401A1 (en)
DE (1) DE60231617D1 (en)
WO (1) WO2002103680A2 (en)

Families Citing this family (80)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003131683A (en) * 2001-10-22 2003-05-09 Sony Corp Device and method for voice recognition, and program and recording medium
EP1565906A1 (en) * 2002-11-22 2005-08-24 Koninklijke Philips Electronics N.V. Speech recognition device and method
KR100937572B1 (en) 2004-04-30 2010-01-19 힐크레스트 래보래토리스, 인크. Free space pointing device and method
US7386448B1 (en) * 2004-06-24 2008-06-10 T-Netix, Inc. Biometric voice authentication
US20060020447A1 (en) * 2004-07-26 2006-01-26 Cousineau Leo E Ontology based method for data capture and knowledge representation
US20060020493A1 (en) * 2004-07-26 2006-01-26 Cousineau Leo E Ontology based method for automatically generating healthcare billing codes from a patient encounter
US20060020466A1 (en) * 2004-07-26 2006-01-26 Cousineau Leo E Ontology based medical patient evaluation method for data capture and knowledge representation
US20060020465A1 (en) * 2004-07-26 2006-01-26 Cousineau Leo E Ontology based system for data capture and knowledge representation
US7363223B2 (en) * 2004-08-13 2008-04-22 International Business Machines Corporation Policy analysis framework for conversational biometrics
US10223934B2 (en) 2004-09-16 2019-03-05 Lena Foundation Systems and methods for expressive language, developmental disorder, and emotion assessment, and contextual feedback
US8078465B2 (en) * 2007-01-23 2011-12-13 Lena Foundation System and method for detection and analysis of speech
US8938390B2 (en) 2007-01-23 2015-01-20 Lena Foundation System and method for expressive language and developmental disorder assessment
US9355651B2 (en) 2004-09-16 2016-05-31 Lena Foundation System and method for expressive language, developmental disorder, and emotion assessment
US9240188B2 (en) 2004-09-16 2016-01-19 Lena Foundation System and method for expressive language, developmental disorder, and emotion assessment
US8137195B2 (en) 2004-11-23 2012-03-20 Hillcrest Laboratories, Inc. Semantic gaming and application transformation
FR2893157B1 (en) * 2005-11-08 2007-12-21 Thales Sa DECISION-MAKING METHOD FOR COMPARING BIOMETRIC DATA
JP4745094B2 (en) * 2006-03-20 2011-08-10 富士通株式会社 Clustering system, clustering method, clustering program, and attribute estimation system using clustering system
US7809170B2 (en) 2006-08-10 2010-10-05 Louisiana Tech University Foundation, Inc. Method and apparatus for choosing and evaluating sample size for biometric training process
WO2008022157A2 (en) * 2006-08-15 2008-02-21 Vxv Solutions, Inc. Adaptive tuning of biometric engines
CN101154380B (en) * 2006-09-29 2011-01-26 株式会社东芝 Method and device for registration and validation of speaker's authentication
US7650281B1 (en) * 2006-10-11 2010-01-19 The U.S. Goverment as Represented By The Director, National Security Agency Method of comparing voice signals that reduces false alarms
CA2676380C (en) 2007-01-23 2015-11-24 Infoture, Inc. System and method for detection and analysis of speech
US7974977B2 (en) * 2007-05-03 2011-07-05 Microsoft Corporation Spectral clustering using sequential matrix compression
US20090071315A1 (en) * 2007-05-04 2009-03-19 Fortuna Joseph A Music analysis and generation method
US8160866B2 (en) * 2008-04-18 2012-04-17 Tze Fen Li Speech recognition method for both english and chinese
US9247369B2 (en) * 2008-10-06 2016-01-26 Creative Technology Ltd Method for enlarging a location with optimal three-dimensional audio perception
EP2182512A1 (en) 2008-10-29 2010-05-05 BRITISH TELECOMMUNICATIONS public limited company Speaker verification
US9390420B2 (en) * 2008-12-19 2016-07-12 At&T Intellectual Property I, L.P. System and method for wireless ordering using speech recognition
GB2478780A (en) * 2010-03-18 2011-09-21 Univ Abertay Dundee An adaptive, quantised, biometric method
WO2012075640A1 (en) * 2010-12-10 2012-06-14 Panasonic Corporation Modeling device and method for speaker recognition, and speaker recognition system
JP2012151663A (en) * 2011-01-19 2012-08-09 Toshiba Corp Stereophonic sound generation device and stereophonic sound generation method
CN102237089B (en) * 2011-08-15 2012-11-14 哈尔滨工业大学 Method for reducing error identification rate of text irrelevant speaker identification system
US9147401B2 (en) * 2011-12-21 2015-09-29 Sri International Method and apparatus for speaker-calibrated speaker detection
US9147400B2 (en) * 2011-12-21 2015-09-29 Sri International Method and apparatus for generating speaker-specific spoken passwords
WO2013110125A1 (en) * 2012-01-24 2013-08-01 Auraya Pty Ltd Voice authentication and speech recognition system and method
US9042867B2 (en) 2012-02-24 2015-05-26 Agnitio S.L. System and method for speaker recognition on mobile devices
US9280984B2 (en) 2012-05-14 2016-03-08 Htc Corporation Noise cancellation method
US9251792B2 (en) 2012-06-15 2016-02-02 Sri International Multi-sample conversational voice verification
US8484022B1 (en) * 2012-07-27 2013-07-09 Google Inc. Adaptive auto-encoders
US8442821B1 (en) 2012-07-27 2013-05-14 Google Inc. Multi-frame prediction for hybrid neural network/hidden Markov models
US9240184B1 (en) 2012-11-15 2016-01-19 Google Inc. Frame-level combination of deep neural network and gaussian mixture models
US10438593B2 (en) * 2015-07-22 2019-10-08 Google Llc Individualized hotword detection models
US10062388B2 (en) * 2015-10-22 2018-08-28 Motorola Mobility Llc Acoustic and surface vibration authentication
GB2552723A (en) 2016-08-03 2018-02-07 Cirrus Logic Int Semiconductor Ltd Speaker recognition
GB2552722A (en) * 2016-08-03 2018-02-07 Cirrus Logic Int Semiconductor Ltd Speaker recognition
WO2018106971A1 (en) * 2016-12-07 2018-06-14 Interactive Intelligence Group, Inc. System and method for neural network based speaker classification
US20180254054A1 (en) * 2017-03-02 2018-09-06 Otosense Inc. Sound-recognition system based on a sound language and associated annotations
US20180268844A1 (en) * 2017-03-14 2018-09-20 Otosense Inc. Syntactic system for sound recognition
WO2019002831A1 (en) 2017-06-27 2019-01-03 Cirrus Logic International Semiconductor Limited Detection of replay attack
GB201713697D0 (en) 2017-06-28 2017-10-11 Cirrus Logic Int Semiconductor Ltd Magnetic detection of replay attack
GB2563953A (en) 2017-06-28 2019-01-02 Cirrus Logic Int Semiconductor Ltd Detection of replay attack
GB201801530D0 (en) 2017-07-07 2018-03-14 Cirrus Logic Int Semiconductor Ltd Methods, apparatus and systems for authentication
GB201801532D0 (en) 2017-07-07 2018-03-14 Cirrus Logic Int Semiconductor Ltd Methods, apparatus and systems for audio playback
GB201801527D0 (en) 2017-07-07 2018-03-14 Cirrus Logic Int Semiconductor Ltd Method, apparatus and systems for biometric processes
GB201801528D0 (en) 2017-07-07 2018-03-14 Cirrus Logic Int Semiconductor Ltd Method, apparatus and systems for biometric processes
GB201801526D0 (en) 2017-07-07 2018-03-14 Cirrus Logic Int Semiconductor Ltd Methods, apparatus and systems for authentication
US10325602B2 (en) * 2017-08-02 2019-06-18 Google Llc Neural networks for speaker verification
CN107680599A (en) * 2017-09-28 2018-02-09 百度在线网络技术（北京）有限公司 User property recognition methods, device and electronic equipment
GB201801661D0 (en) 2017-10-13 2018-03-21 Cirrus Logic International Uk Ltd Detection of liveness
GB201804843D0 (en) 2017-11-14 2018-05-09 Cirrus Logic Int Semiconductor Ltd Detection of replay attack
GB2567503A (en) 2017-10-13 2019-04-17 Cirrus Logic Int Semiconductor Ltd Analysing speech signals
GB2580821B (en) * 2017-10-13 2022-11-09 Cirrus Logic Int Semiconductor Ltd Analysing speech signals
GB201801663D0 (en) 2017-10-13 2018-03-21 Cirrus Logic Int Semiconductor Ltd Detection of liveness
GB201803570D0 (en) 2017-10-13 2018-04-18 Cirrus Logic Int Semiconductor Ltd Detection of replay attack
GB201719734D0 (en) * 2017-10-30 2018-01-10 Cirrus Logic Int Semiconductor Ltd Speaker identification
GB201801874D0 (en) 2017-10-13 2018-03-21 Cirrus Logic Int Semiconductor Ltd Improving robustness of speech processing system against ultrasound and dolphin attacks
GB201801664D0 (en) 2017-10-13 2018-03-21 Cirrus Logic Int Semiconductor Ltd Detection of liveness
GB201801659D0 (en) 2017-11-14 2018-03-21 Cirrus Logic Int Semiconductor Ltd Detection of loudspeaker playback
US10482878B2 (en) 2017-11-29 2019-11-19 Nuance Communications, Inc. System and method for speech enhancement in multisource environments
WO2019113477A1 (en) 2017-12-07 2019-06-13 Lena Foundation Systems and methods for automatic determination of infant cry and discrimination of cry from fussiness
US11475899B2 (en) 2018-01-23 2022-10-18 Cirrus Logic, Inc. Speaker identification
US11735189B2 (en) 2018-01-23 2023-08-22 Cirrus Logic, Inc. Speaker identification
US11264037B2 (en) 2018-01-23 2022-03-01 Cirrus Logic, Inc. Speaker identification
GB2608710B (en) * 2018-01-23 2023-05-17 Cirrus Logic Int Semiconductor Ltd Speaker identification
US10529356B2 (en) 2018-05-15 2020-01-07 Cirrus Logic, Inc. Detecting unwanted audio signal components by comparing signals processed with differing linearity
CN108877809B (en) * 2018-06-29 2020-09-22 北京中科智加科技有限公司 Speaker voice recognition method and device
CN109147798B (en) * 2018-07-27 2023-06-09 北京三快在线科技有限公司 Speech recognition method, device, electronic equipment and readable storage medium
US10692490B2 (en) 2018-07-31 2020-06-23 Cirrus Logic, Inc. Detection of replay attack
US10915614B2 (en) 2018-08-31 2021-02-09 Cirrus Logic, Inc. Biometric authentication
US11037574B2 (en) 2018-09-05 2021-06-15 Cirrus Logic, Inc. Speaker recognition and speaker change detection

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0654781A2 (en) * 1993-11-19 1995-05-24 AT&T Corp. Method of accommodating for carbon/electret telephone set variability in automatic speaker verification
WO1996041334A1 (en) * 1995-06-07 1996-12-19 Rutgers University Speaker verification system
EP0821346A2 (en) * 1996-07-25 1998-01-28 Siemens Aktiengesellschaft Method for speaker verification by a computer by means of at least one speech signal spoken in by a speaker
WO1998022936A1 (en) * 1996-11-22 1998-05-28 T-Netix, Inc. Subword-based speaker verification using multiple classifier fusion, with channel, fusion, model, and threshold adaptation

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6119083A (en) * 1996-02-29 2000-09-12 British Telecommunications Public Limited Company Training process for the classification of a perceptual signal
US6205424B1 (en) * 1996-07-31 2001-03-20 Compaq Computer Corporation Two-staged cohort selection for speaker verification system
US6246751B1 (en) * 1997-08-11 2001-06-12 International Business Machines Corporation Apparatus and methods for user identification to deny access or service to unauthorized users
US6424946B1 (en) * 1999-04-09 2002-07-23 International Business Machines Corporation Methods and apparatus for unknown speaker labeling using concurrent speech recognition, segmentation, classification and clustering
US6629073B1 (en) * 2000-04-27 2003-09-30 Microsoft Corporation Speech recognition method and apparatus utilizing multi-unit models

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0654781A2 (en) * 1993-11-19 1995-05-24 AT&T Corp. Method of accommodating for carbon/electret telephone set variability in automatic speaker verification
WO1996041334A1 (en) * 1995-06-07 1996-12-19 Rutgers University Speaker verification system
EP0821346A2 (en) * 1996-07-25 1998-01-28 Siemens Aktiengesellschaft Method for speaker verification by a computer by means of at least one speech signal spoken in by a speaker
WO1998022936A1 (en) * 1996-11-22 1998-05-28 T-Netix, Inc. Subword-based speaker verification using multiple classifier fusion, with channel, fusion, model, and threshold adaptation

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
ACERO A, HUANG X: "Augmented Cepstral Normalization for Robust Speech Recognition", PROC. OF THE IEEE WORKSHOP ON AUTOMATIC SPEECH RECOGNITION, December 1995 (1995-12-01), Snowbird, XP002224002, Retrieved from the Internet <URL:http://research.microsoft.com/srg/papers/1995-alexac-snowbird.pdf> [retrieved on 20021206] *
FINAN R A ET AL: "Impostor cohort selection for score normalisation in speaker verification", PATTERN RECOGNITION LETTERS, NORTH-HOLLAND PUBL. AMSTERDAM, NL, vol. 18, no. 9, 1 September 1997 (1997-09-01), pages 881 - 888, XP004102229, ISSN: 0167-8655 *
FINAN R A ET AL: "Improved data modeling for text-dependent speaker recognition using sub-band processing", INTERNATIONAL JOURNAL OF SPEECH TECHNOLOGY, MARCH 2001, KLUWER ACADEMIC PUBLISHERS, NETHERLANDS, vol. 4, no. 1, pages 45 - 62, XP002211993 *
SETHURAMAN R ET AL: "A cepstral based speaker recognition system", SYSTEM THEORY, 1989. PROCEEDINGS., TWENTY-FIRST SOUTHEASTERN SYMPOSIUM ON TALLAHASSEE, FL, USA 26-28 MARCH 1989, WASHINGTON, DC, USA,IEEE COMPUT. SOC. PR, US, 26 March 1989 (1989-03-26), pages 503 - 507, XP010015578, ISBN: 0-8186-1933-3 *

Also Published As

Publication number Publication date
EP1399915B1 (en) 2009-03-18
CN100377209C (en) 2008-03-26
WO2002103680A2 (en) 2002-12-27
CA2451401A1 (en) 2002-12-27
ATE426234T1 (en) 2009-04-15
US20040236573A1 (en) 2004-11-25
AU2002311452B2 (en) 2008-06-19
DE60231617D1 (en) 2009-04-30
EP1399915A2 (en) 2004-03-24
CN1543641A (en) 2004-11-03

Similar Documents

Publication Publication Date Title
WO2002103680A3 (en) Speaker recognition system ____________________________________
EP1704668B1 (en) System and method for providing claimant authentication
CA2247006C (en) Speech processing
EP0501631B1 (en) Temporal decorrelation method for robust speaker verification
AU636335B2 (en) Voice verification circuit for validating the identity of telephone calling card customers
WO2010066435A1 (en) Cut and paste spoofing detection using dynamic time wraping
US20040111261A1 (en) Computationally efficient method and apparatus for speaker recognition
US9530417B2 (en) Methods, systems, and circuits for text independent speaker recognition with automatic learning features
JPH02238495A (en) Time series signal recognizing device
US6308153B1 (en) System for voice verification using matched frames
CN108597523B (en) Identified by speaking person method, server and computer readable storage medium
EP1417677A1 (en) Voice registration method and system, and voice recognition method and system based on voice registration method and system
Fong Using hierarchical time series clustering algorithm and wavelet classifier for biometric voice classification
Wahyudi et al. Intelligent voice-based door access control system using adaptive-network-based fuzzy inference systems (ANFIS) for building security
Desai et al. Speaker recognition using MFCC and hybrid model of VQ and GMM
Dustor et al. Speaker recognition system with good generalization properties
Warule et al. Hilbert-Huang Transform-Based Time-Frequency Analysis of Speech Signals for the Identification of Common Cold
Naik et al. Evaluation of a high performance speaker verification system for access control
US20020169609A1 (en) Method for speaker-identification using application speech
JP2000099090A (en) Speaker recognizing method using symbol string
CN106971725B (en) Voiceprint recognition method and system with priority
Nagajyothi et al. Voice Recognition Based on Vector Quantization Using LBG
US20230186896A1 (en) Speaker verification method using neural network
JP2000148187A (en) Speaker recognizing method, device using the method and program recording medium therefor
EP1016075B1 (en) Method and arrangement for providing speaker reference data for speaker verification

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
AK Designated states

Kind code of ref document: A3

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ OM PH PL PT RO RU SD SE SG SI SK SL TJ TM TN TR TT TZ UA UG US UZ VN YU ZA ZM ZW

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZM ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
WWE Wipo information: entry into national phase

Ref document number: 2002738369

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 2451401

Country of ref document: CA

Ref document number: 1020037016649

Country of ref document: KR

WWE Wipo information: entry into national phase

Ref document number: 2002311452

Country of ref document: AU

WWE Wipo information: entry into national phase

Ref document number: 2004/00292

Country of ref document: ZA

Ref document number: 200400292

Country of ref document: ZA

WWE Wipo information: entry into national phase

Ref document number: 89/CHENP/2004

Country of ref document: IN

WWE Wipo information: entry into national phase

Ref document number: 2002816220X

Country of ref document: CN

WWP Wipo information: published in national office

Ref document number: 2002738369

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWE Wipo information: entry into national phase

Ref document number: 10481523

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: JP

WWW Wipo information: withdrawn in national office

Ref document number: JP