Adaptive gain control based on echo canceller performance information
Abstract
A system and method for provide a stable gain from an adaptive gain control device in a signal path. An echo canceller is also located in the signal path, and is used to provide performance information regarding losses in the signal. This performance information is fed to the automatic gain control device via a connection. The automatic gain control device thereafter uses the performance information to determine a maximum gain that might be provided based upon losses cause by echo conditions. The gain however is limited in order to provide for a stable system. The performance information includes a loss rate that includes a combination of the echo return loss and the echo return loss enhancement.

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Every citation, both ways
| Document | Relation | Office | Category | Cited during | Relevant claims |
|---|---|---|---|---|---|
| EP1152547A2 | Cites | European Patent Office (EPO) | A | Search report | 1-22 |
| US5099472A | Cites | United States of America | X | Search report | 1-16,21,22 |
139 members in 6 offices
Priority claims2
| Document | Office | Kind | Date |
|---|---|---|---|
| 77405 | United States of America | – | |
| 7740502 | United States of America | A |
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Numbers
- Publication
- 1349291
- Application
- 30033989
Titles3
- German
- Adaptive Verstärkungsregelung auf der Basis von Echounterdrückungsvortragsdatei
- English
- Adaptive gain control based on echo canceller performance information
- French
- Contrôle de gain adaptatif basé sur l'information de performance de l'annuleur d'écho
Classification
- CPC, 33
- H04L65/1026
- H04B3/04
- H04B3/23
- H04J3/0632
- H04J3/1688
- H04J3/22
- H04L12/2801
- H04L12/66
- H04L47/10
- H04L47/11
- H04L47/263
- H04L47/28
- H04L49/90
- H04L65/80
- H04L2001/0093
- H04L2012/5671
- H04M3/002
- H04M3/22
- H04M3/2209
- H04M3/2272
- H04M7/006
- H04M7/0069
- H04M7/0072
- H04M2201/40
- H04M2203/2027
- H04M2203/2066
- H04Q1/45
- H04L65/1036
- H04L69/329
- Y02D30/50
- H04L65/70
- H04L67/61
- H04L49/9023
- IPC, 15
- H04B3 04
- H04B3 23
- H04J3 06
- H04J3 16
- H04J3 22
- H04L1 00
- H04L12 28
- H04L12 56
- H04L12 66
- H04L29 06
- H04L29 08
- H04M3 00
- H04M3 22
- H04M7 00
- H04Q1 45
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and 2 moreShow fewer
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