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US 8,411,871 B2Granted
Echo cancellation
AssigneeLantiq Deutschland GmbH
InventorsDavid Schwingshackl, Joerg Hauptmann, Gerhard Paoli, Dietmar Straeussnigg
Life of this patent
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Abstract
Implementations related to echo cancellation are depicted and described herein.
Claims19
A method comprising:
- providing a first echo cancellation path, the first echo cancellation path comprising a first echo cancellation filter;
- providing a second echo cancellation path, the second echo cancellation path comprising a second echo cancellation filter;
- activating the first echo cancellation path and deactivating the second echo cancellation path in a first transceiving operation mode associated with a first telecommunication standard;
- activating the second echo cancellation path and deactivating the first echo cancellation path in a second transceiving operation mode associated with a second telecommunication standard;
- and
- deactivating the first or second echo cancellation path based on a time to adapt filter coefficients associated with the first and second echo cancellation filters.
3 more elements
An apparatus comprising:
- a first echo cancellation path, the first echo cancellation path comprising a first echo cancellation filter;
- a second echo cancellation path, the second echo cancellation path comprising a second echo cancellation filter;
- a first device to selectively activate and deactivate the first echo cancellation path;
- a second device to selectively activate and deactivate the second echo cancellation path,
- wherein deactivating the first or second echo cancellation path is based on a time to adapt filter coefficients associated with the first and second echo cancellation filters.
2 more elements
A transceiver circuit comprising:
- a transmit path;
- a receive path;
- a first echo cancellation path, the first echo cancellation path comprising a first echo cancellation filter;
- a second echo cancellation path, the second echo cancellation path comprising a second echo cancellation filter;
- a first device to selectively couple and decouple the first echo cancellation path with the receive path;
- a second device to selectively couple and decouple the second echo cancellation path with the receive path,
- wherein deactivating the first or second echo cancellation path is based on a time to adapt filter coefficients associated with the first and second echo cancellation filters.
4 more elements
Dependencies are inferred from the claim text.