CA2219358A1 - Quantification de signaux vocaux a l'aide de modeles auditifs humains dans des systemes de codage predictif - Google Patents
Quantification de signaux vocaux a l'aide de modeles auditifs humains dans des systemes de codage predictif Download PDFInfo
- Publication number
- CA2219358A1 CA2219358A1 CA 2219358 CA2219358A CA2219358A1 CA 2219358 A1 CA2219358 A1 CA 2219358A1 CA 2219358 CA2219358 CA 2219358 CA 2219358 A CA2219358 A CA 2219358A CA 2219358 A1 CA2219358 A1 CA 2219358A1
- Authority
- CA
- Canada
- Prior art keywords
- signal
- speech
- pitch
- lpc
- processor
- 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
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Classifications
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- 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
- 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
- G10L19/002—Dynamic bit allocation
-
- 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
- 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
- G10L19/02—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 spectral analysis, e.g. transform vocoders or subband vocoders
- G10L19/0212—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 spectral analysis, e.g. transform vocoders or subband vocoders using orthogonal transformation
-
- 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
- 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
- G10L19/08—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters
- G10L19/12—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being a code excitation, e.g. in code excited linear prediction [CELP] vocoders
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
Abstract
La présente invention concerne un système de compression de la parole dénommé "Codage Prédictif par Transformée" ou TPC (pour "Transform Predictive Coding") qui permet de coder la parole de la bande des 7 Khz (échantillonnée à 16 Khz) en atteignant un débit binaire de 16 ou 32 k-octets/s, à raison de 1 à 2 bits par échantillon. Pour annuler les redondances, le système utilise un dispositif prédictif à court terme et à long terme. Le résiduel de prédiction subit une transformation et un codage dans le domaine de fréquences représenté dans la figure, et ce, au niveau du processeur de transformée (110) après prise en compte des données du domaine temporel de l'additionneur (60) et l'entrée des paramètres depuis le processeur de réponse d'amplitude à filtre de mise en forme (100), ce qui corrige le spectre en vue de la perception auditive. Le vocodeur TPC n'utilise qu'une quantification en boucle ouverte comme le démontre la présence d'un extracteur/interpolateur de hauteur de son (70), ce qui fait que le vocodeur TPC n'est que faiblement complexe. La parole est de qualité transparente à 32 k-octets/s, de très bonne qualité à 24 k-octets/s, et acceptable à 16 k-octets/s.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US1229696P | 1996-02-26 | 1996-02-26 | |
| US60/012,296 | 1996-02-26 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2219358A1 true CA2219358A1 (fr) | 1997-08-28 |
Family
ID=21754300
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2219358 Abandoned CA2219358A1 (fr) | 1996-02-26 | 1997-02-26 | Quantification de signaux vocaux a l'aide de modeles auditifs humains dans des systemes de codage predictif |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP0954851A1 (fr) |
| JP (1) | JPH11504733A (fr) |
| CA (1) | CA2219358A1 (fr) |
| MX (1) | MX9708203A (fr) |
| WO (1) | WO1997031367A1 (fr) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6397178B1 (en) | 1998-09-18 | 2002-05-28 | Conexant Systems, Inc. | Data organizational scheme for enhanced selection of gain parameters for speech coding |
| US6778953B1 (en) * | 2000-06-02 | 2004-08-17 | Agere Systems Inc. | Method and apparatus for representing masked thresholds in a perceptual audio coder |
| WO2002091363A1 (fr) * | 2001-05-08 | 2002-11-14 | Koninklijke Philips Electronics N.V. | Codage audio |
| US7451091B2 (en) | 2003-10-07 | 2008-11-11 | Matsushita Electric Industrial Co., Ltd. | Method for determining time borders and frequency resolutions for spectral envelope coding |
| DE102006022346B4 (de) * | 2006-05-12 | 2008-02-28 | Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Informationssignalcodierung |
| KR101696632B1 (ko) | 2010-07-02 | 2017-01-16 | 돌비 인터네셔널 에이비 | 선택적인 베이스 포스트 필터 |
| WO2012161675A1 (fr) * | 2011-05-20 | 2012-11-29 | Google Inc. | Unité de codage redondant pour codec audio |
| WO2013062201A1 (fr) * | 2011-10-24 | 2013-05-02 | 엘지전자 주식회사 | Procédé et dispositif de quantification de signaux vocaux par sélection de bande |
| CN111862995A (zh) * | 2020-06-22 | 2020-10-30 | 北京达佳互联信息技术有限公司 | 一种码率确定模型训练方法、码率确定方法及装置 |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5012517A (en) * | 1989-04-18 | 1991-04-30 | Pacific Communication Science, Inc. | Adaptive transform coder having long term predictor |
| FR2700632B1 (fr) * | 1993-01-21 | 1995-03-24 | France Telecom | Système de codage-décodage prédictif d'un signal numérique de parole par transformée adaptative à codes imbriqués. |
-
1997
- 1997-02-26 EP EP97907830A patent/EP0954851A1/fr not_active Withdrawn
- 1997-02-26 WO PCT/US1997/002898 patent/WO1997031367A1/fr not_active Application Discontinuation
- 1997-02-26 JP JP9530382A patent/JPH11504733A/ja active Pending
- 1997-02-26 CA CA 2219358 patent/CA2219358A1/fr not_active Abandoned
- 1997-02-26 MX MX9708203A patent/MX9708203A/es unknown
Also Published As
| Publication number | Publication date |
|---|---|
| JPH11504733A (ja) | 1999-04-27 |
| EP0954851A4 (fr) | 1999-11-10 |
| EP0954851A1 (fr) | 1999-11-10 |
| MX9708203A (es) | 1997-12-31 |
| WO1997031367A1 (fr) | 1997-08-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| FZDE | Dead |