ECHO REMOVAL DEVICE, ECHO REMOVAL METHOD, AND NON-TRANSITORY STORAGE MEDIUM
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United States of America Patent
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Issued Date -
Oct 26, 2017
app pub date -
Apr 18, 2017
filing date -
Apr 25, 2016
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Abstract
An echo removal device comprises: an echo canceller that includes a first delay unit configured to delay a reception signal from a communication counterpart, and that is configured to subtract, from a transmission signal for the communication counterpart, a cancellation signal that is generated based on the delayed reception signal obtained by the first delay unit and property information which simulates a property of an echo path; a second delay unit configured to delay the reception signal by an amount of delay different from an amount of delay of the first delay unit; an echo suppressor configured to receive the delayed reception signal obtained by the second delay unit and an output of the echo canceller; and a delay amount calculator configured to calculate and set the amount of delay of the first delay unit and the amount of delay of the second delay unit based on the property information.
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