CA2282567C - Annulation d'echo par un filtre adaptatif double - Google Patents
Annulation d'echo par un filtre adaptatif double Download PDFInfo
- Publication number
- CA2282567C CA2282567C CA002282567A CA2282567A CA2282567C CA 2282567 C CA2282567 C CA 2282567C CA 002282567 A CA002282567 A CA 002282567A CA 2282567 A CA2282567 A CA 2282567A CA 2282567 C CA2282567 C CA 2282567C
- Authority
- CA
- Canada
- Prior art keywords
- filter
- temporary storage
- echo canceller
- multipliers
- adaptive
- 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
- 230000003044 adaptive effect Effects 0.000 title claims abstract description 44
- 230000009977 dual effect Effects 0.000 title claims description 36
- 230000015654 memory Effects 0.000 claims abstract description 60
- 238000000034 method Methods 0.000 claims description 21
- 238000012545 processing Methods 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 9
- 238000002592 echocardiography Methods 0.000 claims description 7
- 230000008569 process Effects 0.000 claims description 5
- 230000005055 memory storage Effects 0.000 claims 4
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- 238000004364 calculation method Methods 0.000 claims 1
- 238000012546 transfer Methods 0.000 abstract description 4
- 230000006870 function Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
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- 230000015556 catabolic process Effects 0.000 description 2
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- 230000001419 dependent effect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
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Landscapes
- Cable Transmission Systems, Equalization Of Radio And Reduction Of Echo (AREA)
Abstract
L'invention concerne un processeur (100) de signaux numériques utilisé pour des calculs d'annulation d'écho. Ce processeur comprend des multiplicateurs/additionneurs parallèles (102/104 et 106/108), une mémoire d'étalonnage (120) de signal d'entrée, et une pluralité d'accumulateurs (112, 114, 116, 118) pour le stockage temporaire des résultats des calculs effectués. Par conséquent, les résultats des calculs ne doivent pas tous être sauvegardés dans une mémoire de données externe (136, 138), ce qui minimise les goulots d'étranglement du transfert de données et augmente nettement l'efficacité calculatoire du processeur (100) de signaux numériques. Les calculs pour les mises à jour du coefficient du filtre adaptatif peuvent donc se faire beaucoup plus rapidement, ce qui fait que les coefficients du filtre adaptatif peuvent être copiés beaucoup plus rapidement d'un filtre à l'autre. Le processeur (100) de signaux numériques a une complexité calculatoire bien moindre que celle des processeurs de signaux numériques actuels.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US08/810,601 US5933797A (en) | 1997-02-28 | 1997-02-28 | Adaptive dual filter echo cancellation |
| US08/810,601 | 1997-02-28 | ||
| PCT/SE1998/000349 WO1998038582A1 (fr) | 1997-02-28 | 1998-02-26 | Annulation d'echo par un filtre adaptatif double |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2282567A1 CA2282567A1 (fr) | 1998-09-03 |
| CA2282567C true CA2282567C (fr) | 2009-04-21 |
Family
ID=31719965
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002282567A Expired - Lifetime CA2282567C (fr) | 1997-02-28 | 1998-02-26 | Annulation d'echo par un filtre adaptatif double |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA2282567C (fr) |
-
1998
- 1998-02-26 CA CA002282567A patent/CA2282567C/fr not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| CA2282567A1 (fr) | 1998-09-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKEX | Expiry |
Effective date: 20180226 |