APPARATUS FOR CANCELLING WIDEBAND ACOUSTIC ECHO AND A METHOD THEREOF, CAPABLE OF DETECTING DOUBLE TALK PREVENTING MALFUNCTION DUE TO NOISE OF A SIGNAL OF FAR-END TALKER (FET) OR NEAR-END TALKER (NET)

摘要

PURPOSE: An apparatus for cancelling wideband acoustic echo and a method thereof are provided to minimize power consumption of a normalized least mean square (NLMS) device and to perform rapid recovery of a system.;CONSTITUTION: An operation unit (130) calculates a threshold value and performance index of a filter coefficient. When the filter coefficient is smaller than the threshold value, a register (140) stores position information of data. When the performance index is lower than a predetermined convergence index after the performance index is compared with the convergence index by using a judgment unit, an index counter unit (150) increases a feedback counter value. When the feedback counter value corresponds to a predetermined recovery reference value, a recovery unit (160) recovers the feedback counter value to a filter coefficient value.;COPYRIGHT KIPO 2013;[Reference numerals] (110) Determination unit; (120) Internal memory; (130) Operation unit; (140) Register; (150) Counter unit; (160) Recovery unit; (AA) Control unit