Electronic device, echo signal cancelling method thereof and non-transitory computer readable recording medium

An echo signal cancelling method of an electronic device comprising:

• obtaining a microphone signal by obtaining a sound received by the electronic device;
• estimating an echo signal of a reference signal which is output from the electronic device;
• cancelling the estimated echo signal from the microphone signal;
• obtaining an adaptive gain to cancel a residual echo from the microphone signal in which the estimated echo signal is canceled;
• and
• obtaining an output signal based on the obtained adaptive gain and the microphone signal in which the estimated echo signal is canceled,
• wherein the obtaining the output signal comprises dividing each of the microphone signal and the reference signal into a magnitude and a phase respectively, and obtaining the output signal of the reference based on the magnitude of the microphone signal and the magnitude of the reference signal.

A non-transitory computer readable recording medium comprising a program to execute an echo signal cancelling method of an electronic device, the method comprising:

• obtaining a microphone signal by obtaining a sound received by the electronic device;
• estimating an echo signal of a reference signal which is output from the electronic device;
• cancelling the estimated echo signal from the microphone signal;
• obtaining an adaptive gain to cancel a residual echo from the microphone signal in which the estimated echo signal is canceled;
• and
• obtaining an output signal based on the obtained adaptive gain and the microphone signal in which the estimated echo signal is canceled,
• wherein the obtaining the output signal comprises dividing each of the microphone signal and the reference signal into a magnitude and a phase respectively, and obtaining the output signal of the reference based on the magnitude of the microphone signal and the magnitude of the reference signal.