Electronic device, and method for reducing noise of voice signal by utilizing same

1. An electronic device comprising:

a wireless communication unit;

a noise reduction filter including a circuit configured to, with respect to a voice signal including a P (positive) voice signal and an N (negative) voice signal, apply the same voltage to each of the P voice signal and the N voice signal;

a power supply unit; and

a processor electrically connected to the wireless communication unit, the noise reduction filter, and the power supply unit,

wherein the processor is configured to:

divide a voice signal of a user into the P voice signal and the N voice signal in a case of making a phone call using a headset,

apply the same voltage to the P voice signal and the N voice signal on the basis of the noise reduction filter, and

combine the P voice signal and the N voice signal so as to cancel noise induced in the voltage, and

wherein the noise reduction filter divides the voice signal of the user into the P voice signal and the N voice signal, and connects wiring corresponding to voltage applied to the P voice signal to wiring corresponding to the N voice signal so that the same voltage as that applied to the P voice signal is applied to the N voice signal.

2. The electronic device of claim 1 wherein the noise reduction filter changes a structure of the wiring corresponding to the N voice signal so that the N voice signal is not connected to the ground.

3. The electronic device of claim 1 , wherein the processor causes a sound combination unit to perform combination into a single voice signal on the basis of the P voice signal and the N voice signal, to which the same voltage has been applied, and cancels noise induced in the voltage, via the combination.

4. The electronic device of claim 3 , wherein the processor cancels noise generated in a plurality of frequency bands and noise directly generated in a voice signal line corresponding to the P voice signal and the N voice signal, via the combination of the P voice signal and the N voice signal.

5. The electronic device of claim 3 , wherein the sound combination unit comprises:

a power amplifier configured to amplify the P voice signal and the N voice signal; and

a switch configured to determine a microphone operation scheme to be one of a single-ended scheme and a differential scheme.

6. The electronic device of claim 3 , wherein the processor transmits the combined single voice signal to an analog-to-digital converter (ADC) so as to enable conversion of the transmitted voice signal into a digital signal.

7. The electronic device of claim 1 , wherein the headset is an external device including a microphone and an earphone, and the headset receives a voice signal of the user on the basis of the microphone when the microphone is connected to the electronic device, and outputs a voice signal of a counterpart on the basis of the earphone.

8. A noise reduction method comprising:

connecting a call using a headset;

dividing a voice signal of a user, which is received through the headset, into a P voice signal and an N voice signal;

applying the same voltage to the P voice signal and the N voice signal by means of a noise reduction filter; and

combining the P voice signal and the N voice signal, thereby cancelling noise induced in the voltage,

wherein the noise reduction filter divides the voice signal of the user into the P voice signal and the N voice signal, and connects wiring corresponding to voltage applied to the P voice signal to wiring corresponding to the N voice signal so that the same voltage as that applied to the P voice signal is applied to the N voice signal.

9. The method of claim 8 ,

wherein the noise reduction filter is a filter in which a wiring structure corresponding to the N voice signal has been changed so that the N voice signal is not connected to the ground.

10. The method of claim 8 , wherein the cancelling of the noise comprises:

performing combination into a single voice signal by a sound combination unit on the basis of the P voice signal and the N voice signal, to which the same voltage has been applied; and

cancelling noise induced in the voltage, via the combination.

11. The method of claim 10 , wherein the cancelling of the noise comprises cancelling noise generated in a plurality of frequency bands and noise directly generated in a voice signal line corresponding to the P voice signal and the N voice signal, via the combination of the P voice signal and the N voice signal.

12. The method of claim 10 , wherein the sound combination unit comprises: a power amplifier configured to amplify the P voice signal and the N voice signal; and

a switch configured to determine a microphone operation scheme to be one of a single-ended scheme and a differential scheme.

13. The method of claim 10 , further comprising transmitting the combined single voice signal to an analog-to-digital converter (ADC) so as to convert the transmitted voice signal into a digital signal.

14. The method of claim 8 , wherein the headset is an external device including a microphone and an earphone, and performs:

receiving a voice signal of the user on the basis of the microphone when the microphone is connected to the electronic device; and

outputting a voice signal of a counterpart on the basis of the earphone.