ECHO CANCELLER BETWEEN SYSTEMS OF COMMUNICATION DEVICE

ECHO CANCELLER BETWEEN SYSTEMS OF COMMUNICATION DEVICE

PROBLEM TO BE SOLVED: To achieve stable convergence of the filter coefficient of an adaptive filter in a training mode and a tracking mode of an echo canceller of each of a plurality of communication devices connected to the same cable.SOLUTION: An echo canceller comprises: an operation mode control...

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Hauptverfasser: SASAKI NORIO, KISHIBE HIDETO, ODA KENJI, HANAUMI SUSUMU
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
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creator SASAKI NORIO
KISHIBE HIDETO
ODA KENJI
HANAUMI SUSUMU
description PROBLEM TO BE SOLVED: To achieve stable convergence of the filter coefficient of an adaptive filter in a training mode and a tracking mode of an echo canceller of each of a plurality of communication devices connected to the same cable.SOLUTION: An echo canceller comprises: an operation mode control unit which commands an operation mode; and a filter control unit which receives its training command to stop updating the filter coefficient of an adaptive filter coping with a near-end crosstalk echo from another communication device and to start updating the filter coefficient of an adaptive filter coping with the transmission echo of a relevant communication device, and starts updating the filter coefficient of each adaptive filter depending on the condition of reception of a tracking mode command and reception of presence of a reference signal.
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
title ECHO CANCELLER BETWEEN SYSTEMS OF COMMUNICATION DEVICE
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