CA2391562C - Lissage de gain dans un decodeur de signaux vocaux et audio a large bande - Google Patents
Lissage de gain dans un decodeur de signaux vocaux et audio a large bande Download PDFInfo
- Publication number
- CA2391562C CA2391562C CA 2391562 CA2391562A CA2391562C CA 2391562 C CA2391562 C CA 2391562C CA 2391562 CA2391562 CA 2391562 CA 2391562 A CA2391562 A CA 2391562A CA 2391562 C CA2391562 C CA 2391562C
- Authority
- CA
- Canada
- Prior art keywords
- gain
- codevector
- signal
- smoothed
- wideband signal
- 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
Links
- 238000009499 grossing Methods 0.000 title claims abstract 38
- 230000005236 sound signal Effects 0.000 title 1
- 238000000034 method Methods 0.000 claims abstract 21
- 230000001413 cellular effect Effects 0.000 claims 8
- 230000003595 spectral effect Effects 0.000 claims 8
- 230000003044 adaptive effect Effects 0.000 claims 4
- 230000002457 bidirectional effect Effects 0.000 claims 4
- 238000004519 manufacturing process Methods 0.000 claims 4
- 230000010267 cellular communication Effects 0.000 claims 2
- 238000013507 mapping Methods 0.000 claims 2
Classifications
-
- 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
- G10L19/083—Determination or coding of the excitation function; Determination or coding of the long-term prediction parameters the excitation function being an excitation gain
Landscapes
- Engineering & Computer Science (AREA)
- Computational Linguistics (AREA)
- Signal Processing (AREA)
- Health & Medical Sciences (AREA)
- Audiology, Speech & Language Pathology (AREA)
- Human Computer Interaction (AREA)
- Physics & Mathematics (AREA)
- Acoustics & Sound (AREA)
- Multimedia (AREA)
- Compression, Expansion, Code Conversion, And Decoders (AREA)
- Reduction Or Emphasis Of Bandwidth Of Signals (AREA)
Abstract
La présente invention concerne un procédé et un dispositif de lissage de gain modifiant l'amplitude d'un nouveau vecteur de code par rapport au bruit de fond présent dans un signal à large bande préalablement échantillonné. Ce dispositif de lissage de gain comprend un calculateur de lissage de gain servant à calculer un tel lissage en réaction à un facteur représentant la voix dans le signal à large bande échantillonné, un facteur représentant la stabilité d'un ensemble de coefficients de filtre de prédiction linéaire, et un nouveau gain de table de code. Le dispositif de lissage de gain comprend également un amplificateur servant à amplifier le nouveau vecteur de code au moyen du lissage de gain, et ce afin de produire un nouveau vecteur de code à gain lissé. La fonction du dispositif de lissage de gain améliore le signal synthétisé perçu lorsque le bruit de fond est présent dans le signal à large bande échantillonné.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA 2391562 CA2391562C (fr) | 1999-11-18 | 2000-11-17 | Lissage de gain dans un decodeur de signaux vocaux et audio a large bande |
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA002290037A CA2290037A1 (fr) | 1999-11-18 | 1999-11-18 | Dispositif amplificateur a lissage du gain et methode pour codecs de signaux audio et de parole a large bande |
| CA2,290,037 | 1999-11-18 | ||
| PCT/CA2000/001381 WO2001037264A1 (fr) | 1999-11-18 | 2000-11-17 | Lissage de gain dans un decodeur de signaux vocaux et audio a large bande |
| CA 2391562 CA2391562C (fr) | 1999-11-18 | 2000-11-17 | Lissage de gain dans un decodeur de signaux vocaux et audio a large bande |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2391562A1 CA2391562A1 (fr) | 2001-05-25 |
| CA2391562C true CA2391562C (fr) | 2006-05-16 |
Family
ID=25681334
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2391562 Expired - Lifetime CA2391562C (fr) | 1999-11-18 | 2000-11-17 | Lissage de gain dans un decodeur de signaux vocaux et audio a large bande |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2391562C (fr) |
-
2000
- 2000-11-17 CA CA 2391562 patent/CA2391562C/fr not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2391562A1 (fr) | 2001-05-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20201117 |