CA2614625C - Suppresseur de composante de bruit d'un signal d'entree vocal - Google Patents

Suppresseur de composante de bruit d'un signal d'entree vocal Download PDF

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Publication number
CA2614625C
CA2614625C CA2614625A CA2614625A CA2614625C CA 2614625 C CA2614625 C CA 2614625C CA 2614625 A CA2614625 A CA 2614625A CA 2614625 A CA2614625 A CA 2614625A CA 2614625 C CA2614625 C CA 2614625C
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CA
Canada
Prior art keywords
noise
spectrum
vector
section
random
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
CA2614625A
Other languages
English (en)
Other versions
CA2614625A1 (fr
Inventor
Kazutoshi Yasunaga
Toshiyuki Morii
Taisuke Watanabe
Hiroyuki Ehara
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.)
Godo Kaisha IP Bridge 1
Original Assignee
Panasonic Corp
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 JP29473896A external-priority patent/JP4003240B2/ja
Priority claimed from JP31032496A external-priority patent/JP4006770B2/ja
Priority claimed from JP03458297A external-priority patent/JP3174742B2/ja
Priority claimed from JP03458397A external-priority patent/JP3700310B2/ja
Application filed by Panasonic Corp filed Critical Panasonic Corp
Priority claimed from CA002355978A external-priority patent/CA2355978C/fr
Publication of CA2614625A1 publication Critical patent/CA2614625A1/fr
Application granted granted Critical
Publication of CA2614625C publication Critical patent/CA2614625C/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Compression, Expansion, Code Conversion, And Decoders (AREA)
  • Transmission Systems Not Characterized By The Medium Used For Transmission (AREA)
  • Analogue/Digital Conversion (AREA)

Abstract

La présente invention concerne un suppresseur de bruit afin de supprimer la composante de bruit d'un signal vocal d'entrée, le suppresseur de bruit comprenant un convertisseur de courant c.a/c.c., un ajusteur du coefficient de suppression du bruit, un transformateur de Fourier, un dispositif de mémorisation du spectre du bruit, un estimateur de bruit et un compensateur de suppression de bruit/spectral à utiliser avec un codeur vocal. Le suppresseur de bruit donne la possibilité d'améliorer les caractéristiques de l'enveloppe du spectre des signaux d'entrée au moyen de coefficients de prédiction linéaires et d'empêcher toute dégradation de la qualité sonore, même lorsque le niveau de bruit est élevé.
CA2614625A 1996-11-07 1997-11-06 Suppresseur de composante de bruit d'un signal d'entree vocal Expired - Lifetime CA2614625C (fr)

Applications Claiming Priority (9)

Application Number Priority Date Filing Date Title
JP29473896A JP4003240B2 (ja) 1996-11-07 1996-11-07 音声符号化装置及び音声復号化装置
JP8-294738 1996-11-07
JP31032496A JP4006770B2 (ja) 1996-11-21 1996-11-21 ノイズ推定装置、ノイズ削減装置、ノイズ推定方法、及びノイズ削減方法
JP8-310324 1996-11-21
JP03458297A JP3174742B2 (ja) 1997-02-19 1997-02-19 Ｃｅｌｐ型音声復号化装置及びｃｅｌｐ型音声復号化方法
JP03458397A JP3700310B2 (ja) 1997-02-19 1997-02-19 ベクトル量子化装置及びベクトル量子化方法
JP9-34583 1997-02-19
JP9-34582 1997-02-19
CA002355978A CA2355978C (fr) 1996-11-07 1997-11-06 Generatrice a traitement vectoriel excite, voix coder/decoder

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002355978A Division CA2355978C (fr) 1996-11-07 1997-11-06 Generatrice a traitement vectoriel excite, voix coder/decoder

Publications (2)

Publication Number Publication Date
CA2614625A1 CA2614625A1 (fr) 1998-05-14
CA2614625C true CA2614625C (fr) 2012-02-07

Family

ID=33568857

Family Applications (3)

Application Number Title Priority Date Filing Date
CA2483280A Expired - Lifetime CA2483280C (fr) 1996-11-07 1997-11-06 Generatrice a traitement vectoriel excite, voix coder/decoder
CA2551458A Expired - Lifetime CA2551458C (fr) 1996-11-07 1997-11-06 Appareil de quantification vectorielle
CA2614625A Expired - Lifetime CA2614625C (fr) 1996-11-07 1997-11-06 Suppresseur de composante de bruit d'un signal d'entree vocal

Family Applications Before (2)

Application Number Title Priority Date Filing Date
CA2483280A Expired - Lifetime CA2483280C (fr) 1996-11-07 1997-11-06 Generatrice a traitement vectoriel excite, voix coder/decoder
CA2551458A Expired - Lifetime CA2551458C (fr) 1996-11-07 1997-11-06 Appareil de quantification vectorielle

Country Status (1)

Country Link
CA (3) CA2483280C (fr)

Also Published As

Publication number Publication date
CA2614625A1 (fr) 1998-05-14
CA2551458A1 (fr) 1998-05-14
CA2483280A1 (fr) 1998-05-14
CA2483280C (fr) 2011-04-26
CA2551458C (fr) 2012-01-17

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CA2614625C (fr) Suppresseur de composante de bruit d'un signal d'entree vocal
EP1132894B1 (fr) Procédé de production d'une table de codes de quantification vectorielle
CA2355978C (fr) Generatrice a traitement vectoriel excite, voix coder/decoder

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Effective date: 20171106