HANDS-FREE SYSTEM INCLUDING AN ECHO TREATMENT UNIT CAPABLE OF ELIMINATING AN ECHO COMPONENT SIGNAL MATCHED WITH A DELAY DEGREE BY COMPARING AN ECHO DELAY SIGNAL WITH AN ECHO COMPONENT SIGNAL

摘要

PURPOSE: A hands-free system including an echo treatment unit is provided to prevent an echo signal treatment error generated in delay time for an echo signal component.;CONSTITUTION: An echo treatment unit (110) included in a hands-free system (100) comprises an echo delay detector (111), an echo delay filter unit (113), and an echo elimination signal processing unit (115). The echo delay detector calculates delay time for echo after receiving an echo component signal and an echo reference signal. The echo delay filter unit outputs an echo delay signal generated by applying an echo reference signal to the calculated delay time. The echo elimination signal processing unit eliminates an echo component signal in which the echo delay signal is matched with an echo component signal.;COPYRIGHT KIPO 2013;[Reference numerals] (10) Microphone; (100) Hands-free system; (111) Echo delay detector; (113) Echo delay filter unit; (115) Echo elimination signal processing unit; (120) Noise elimination signal processing unit; (20) Speaker