CA2247364A1 - Method and recognizer for recognizing a sampled sound signal in noise - Google Patents

Method and recognizer for recognizing a sampled sound signal in noise

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Publication number
CA2247364A1
CA2247364A1 CA002247364A CA2247364A CA2247364A1 CA 2247364 A1 CA2247364 A1 CA 2247364A1 CA 002247364 A CA002247364 A CA 002247364A CA 2247364 A CA2247364 A CA 2247364A CA 2247364 A1 CA2247364 A1 CA 2247364A1
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CA
Canada
Prior art keywords
feature
noise
feature vectors
recognizing
recognizer
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
CA002247364A
Other languages
French (fr)
Other versions
CA2247364C (en
Inventor
Adam B. Fineberg
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.)
Motorola Solutions Inc
Original Assignee
Motorola, Inc.
Adam B. Fineberg
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 Motorola, Inc., Adam B. Fineberg filed Critical Motorola, Inc.
Publication of CA2247364A1 publication Critical patent/CA2247364A1/en
Application granted granted Critical
Publication of CA2247364C publication Critical patent/CA2247364C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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
    • G10L15/00—Speech recognition
    • G10L15/20—Speech recognition techniques specially adapted for robustness in adverse environments, e.g. in noise, of stress induced speech
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L15/00—Speech recognition
    • G10L15/02—Feature extraction for speech recognition; Selection of recognition unit

Abstract

A sound recognizer uses a feature value normalization process to substantially increase the accuracy of recognizing acoustic signals in noise. The sound recognizer includes a feature vector device (110) which determines a number of feature values for a number of analysis frames, a min/max device (120) which determines a minimum and maximum feature value for each of a number of frequency bands, a normalizer (130) which normalizes each of the feature values with the minimum and maximum feature values resulting in normalized feature vectors, and a comparator (140) which compares the normalized feature vectors with template feature vectors to identify one of the template feature vectors that most resembles the normalized feature vectors.
CA002247364A 1996-03-08 1997-03-06 Method and recognizer for recognizing a sampled sound signal in noise Expired - Fee Related CA2247364C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US61326996A 1996-03-08 1996-03-08
US08/613,269 1996-03-08
PCT/US1997/004350 WO1997033273A1 (en) 1996-03-08 1997-03-06 Method and recognizer for recognizing a sampled sound signal in noise

Publications (2)

Publication Number Publication Date
CA2247364A1 true CA2247364A1 (en) 1997-09-12
CA2247364C CA2247364C (en) 2002-05-14

Family

ID=24456589

Family Applications (1)

Application Number Title Priority Date Filing Date
CA002247364A Expired - Fee Related CA2247364C (en) 1996-03-08 1997-03-06 Method and recognizer for recognizing a sampled sound signal in noise

Country Status (9)

Country Link
US (1) US5842162A (en)
EP (1) EP0950239B1 (en)
AT (1) ATE250801T1 (en)
AU (1) AU702852B2 (en)
CA (1) CA2247364C (en)
DE (1) DE69725172T2 (en)
ES (1) ES2208887T3 (en)
IL (1) IL125649A (en)
WO (1) WO1997033273A1 (en)

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Also Published As

Publication number Publication date
IL125649A (en) 2002-12-01
EP0950239A4 (en) 2000-07-12
DE69725172D1 (en) 2003-10-30
DE69725172T2 (en) 2004-04-08
AU702852B2 (en) 1999-03-04
WO1997033273A1 (en) 1997-09-12
CA2247364C (en) 2002-05-14
ATE250801T1 (en) 2003-10-15
EP0950239A1 (en) 1999-10-20
AU2216997A (en) 1997-09-22
EP0950239B1 (en) 2003-09-24
US5842162A (en) 1998-11-24
ES2208887T3 (en) 2004-06-16
IL125649A0 (en) 1999-04-11

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