CA2258183A1 - Codage avance de dtmf et d'autres tonalites de signalisation - Google Patents

Codage avance de dtmf et d'autres tonalites de signalisation Download PDF

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Publication number
CA2258183A1
CA2258183A1 CA 2258183 CA2258183A CA2258183A1 CA 2258183 A1 CA2258183 A1 CA 2258183A1 CA 2258183 CA2258183 CA 2258183 CA 2258183 A CA2258183 A CA 2258183A CA 2258183 A1 CA2258183 A1 CA 2258183A1
Authority
CA
Canada
Prior art keywords
spectrum
voice
voice signal
signal
quantization
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.)
Abandoned
Application number
CA 2258183
Other languages
English (en)
Inventor
Redwan Salami
Claude Laflamme
Jean-Pierre Adoul
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.)
Universite de Sherbrooke
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of CA2258183A1 publication Critical patent/CA2258183A1/fr
Abandoned legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/06—Determination or coding of the spectral characteristics, e.g. of the short-term prediction coefficients
    • G10L19/07—Line spectrum pair [LSP] vocoders
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L19/04—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis using predictive techniques
    • G10L19/16—Vocoder architecture
    • G10L19/18—Vocoders using multiple modes
    • G10L19/20—Vocoders using multiple modes using sound class specific coding, hybrid encoders or object based coding
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L19/00—Speech or audio signals analysis-synthesis techniques for redundancy reduction, e.g. in vocoders; Coding or decoding of speech or audio signals, using source filter models or psychoacoustic analysis
    • G10L2019/0001—Codebooks
    • G10L2019/0016—Codebook for LPC parameters
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10L—SPEECH ANALYSIS OR SYNTHESIS; SPEECH RECOGNITION; SPEECH OR VOICE PROCESSING; SPEECH OR AUDIO CODING OR DECODING
    • G10L25/00—Speech or voice analysis techniques not restricted to a single one of groups G10L15/00 - G10L21/00
    • G10L25/78—Detection of presence or absence of voice signals

Abstract

Cette invention concerne un procédé ainsi qu'un dispositif qui permettent de quantifier un vecteur de spectre émis selon des intervalles de temps répétés, ceci de manière à produire un indice de spectre. A cette fin, on utilise une liste de codage de quantification de vecteur de spectre, laquelle comprend une première partie de quantification de signaux vocaux ainsi qu'une seconde partie de quantification de signaux non vocaux. On détermine ensuite si le vecteur de spectre représente un signal vocal ou un signal non vocal. Dans le cas où le vecteur de spectre représente un signal vocal, on effectue une recherche dans la première partie de la liste de codage de manière à quantifier le vecteur de spectre et à produire l'indice de spectre. Dans le cas où le vecteur de spectre représente un signal non vocal, on effectue une recherche dans la seconde partie de liste de codage de manière à quantifier le vecteur de spectre et à produire l'indice de spectre. Dans un premier mode de réalisation, on effectue des recherches dans les première et seconde parties de la liste de codage en mesurant la distance pondérée qui sépare le vecteur de spectre des entrées de ces deux parties. On considère que le vecteur de spectre représente un signal non vocal lorsque la distance pondérée la plus petite correspond à la distance pondérée qui a été mesurée entre ledit vecteur de spectre et une entrée de la seconde partie de la liste de codage. Dans un second mode de réalisation, on mesure la distance pondérée qui sépare le vecteur de spectre des entrées de la seconde partie de la liste de codage. On considère que le vecteur de spectre représente un signal non vocal lorsque la distance pondérée qui a été mesurée entre ledit vecteur de spectre et une entrée de la seconde partie, est inférieure à un seuil prédéterminé.
CA 2258183 1996-07-17 1997-07-17 Codage avance de dtmf et d'autres tonalites de signalisation Abandoned CA2258183A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US2191196P 1996-07-17 1996-07-17
US60/021,911 1996-07-17

Publications (1)

Publication Number Publication Date
CA2258183A1 true CA2258183A1 (fr) 1998-01-29

Family

ID=21806795

Family Applications (1)

Application Number Title Priority Date Filing Date
CA 2258183 Abandoned CA2258183A1 (fr) 1996-07-17 1997-07-17 Codage avance de dtmf et d'autres tonalites de signalisation

Country Status (4)

Country Link
EP (1) EP0913034A2 (fr)
AU (1) AU3534597A (fr)
CA (1) CA2258183A1 (fr)
WO (1) WO1998004046A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002055699A (ja) * 2000-08-10 2002-02-20 Mitsubishi Electric Corp 音声符号化装置および音声符号化方法
US7970606B2 (en) * 2002-11-13 2011-06-28 Digital Voice Systems, Inc. Interoperable vocoder
US7634399B2 (en) 2003-01-30 2009-12-15 Digital Voice Systems, Inc. Voice transcoder
US8359197B2 (en) 2003-04-01 2013-01-22 Digital Voice Systems, Inc. Half-rate vocoder
US8036886B2 (en) 2006-12-22 2011-10-11 Digital Voice Systems, Inc. Estimation of pulsed speech model parameters
US11270714B2 (en) 2020-01-08 2022-03-08 Digital Voice Systems, Inc. Speech coding using time-varying interpolation

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0443548B1 (fr) * 1990-02-22 2003-07-23 Nec Corporation Codeur de parole
JP3089769B2 (ja) * 1991-12-03 2000-09-18 日本電気株式会社 音声符号化装置
US5495555A (en) * 1992-06-01 1996-02-27 Hughes Aircraft Company High quality low bit rate celp-based speech codec
JP2746039B2 (ja) * 1993-01-22 1998-04-28 日本電気株式会社 音声符号化方式

Also Published As

Publication number Publication date
AU3534597A (en) 1998-02-10
WO1998004046A3 (fr) 1998-03-26
EP0913034A2 (fr) 1999-05-06
WO1998004046A2 (fr) 1998-01-29

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