초록 ▼

In a communication system (100), a first echo return loss through communication system (100) associated with a first call connection between a caller (111) and a first caller (114) is estimated. A second echo return loss associated with a second call connection between caller (111) and a second call

In a communication system (100), a first echo return loss through communication system (100) associated with a first call connection between a caller (111) and a first caller (114) is estimated. A second echo return loss associated with a second call connection between caller (111) and a second caller (112) is estimated. The call connection may be switching from the first call connection to the second call connection after estimating the first echo return loss, and from the second call connection to the first call connection after estimating the second echo return loss. Echo generated in the first call connection is cancelled based on at least the first echo return loss by an echo canceller in communication system (100) after switching from the second call connection to the first call connection.

대표청구항 ▼

1. A method of canceling echo in a plurality of call connections in a call-waiting scenario comprising the steps of:calculating a first echo return loss estimate and a first set of echo coefficients associated with a first of the plurality of call connections; receiving a first flash with informatio

1. A method of canceling echo in a plurality of call connections in a call-waiting scenario comprising the steps of:calculating a first echo return loss estimate and a first set of echo coefficients associated with a first of the plurality of call connections; receiving a first flash with information message requesting that a second of the plurality of call connections become active; learning a code associated with the first flash with information message for subsequent switch requests; saving the first echo return loss estimate and the first set of echo coefficients associated with the first of the plurality of call connections; activating the second of the plurality of call connections; receiving a second flash with information message requesting that the first of the plurality of call connections become active; activating the first of the plurality of call connections; and canceling echo in the first of the plurality of call connections using the first echo return loss estimate and the first set of echo coefficients.