Wearable device and method of controlling the same

1. A wearable device comprising:

a clock generator configured to generate a clock signal;

a signal generator configured to generate a first synchronization signal based on the clock signal;

an electrode configured to transmit and receive an electrical signal through a body while contacting the body;

a switch configured to connect the signal generator and the electrode or block a connection between the signal generator and the electrode; and

at least one processor configured to:

control the switch to connect the signal generator and the electrode for transmitting the first synchronization signal generated in the signal generator to the electrode in a master mode, and

control the switch to block the connection between the signal generator and the electrode in a slave mode,

wherein the at least one processor is further configured to adjust at least one of a frequency or a phase of the clock signal based on a second synchronization signal received through the electrode from another wearable device worn on the body.

2. The wearable device of claim 1 , wherein the at least one processor is further configured to synchronize the first synchronization signal with the second synchronization signal by adjusting at least one of the frequency or the phase of the clock signal.

3. The wearable device of claim 1 , wherein the at least one processor is further configured to determine an operation mode of the wearable device as the slave mode, based on a signal with a period greater than or equal to a predetermined value being received through the electrode.

4. The wearable device of claim 1 , wherein the at least one processor is further configured to determine an operation mode of the wearable device as the master mode, based on a signal with a period greater than or equal to a predetermined value not being received for a predetermined period of time.

5. The wearable device of claim 1 , wherein the at least one processor is further configured to transmit a reset signal to the signal generator in response to detecting a falling edge of the second synchronization signal.

6. The wearable device of claim 1 , further comprising:

a microphone,

wherein the at least one processor is further configured to process a sound signal received from the microphone based on the clock signal and the first synchronization signal.

7. The wearable device of claim 6 , further comprising:

a communicator configured to wirelessly communicate with the other wearable device,

wherein the at least one processor is further configured to perform beamforming based on the sound signal received from the microphone and a sound signal received from a second microphone of the other wearable device.

8. The wearable device of claim 1 , further comprising:

a communicator configured to wirelessly communicate with an external terminal,

wherein the at least one processor is further configured to process a sound signal received from the external terminal based on the clock signal and the first synchronization signal.

9. The wearable device of claim 8 , wherein the at least one processor is further configured to control the communicator to transmit the first synchronization signal to the external terminal.

10. The wearable device of claim 1 , wherein the at least one processor is further configured to control the switch to change an operation mode of the wearable device to the slave mode, based on the wearable device being operating in the master mode for a predetermined period of time.

11. A method of controlling a wearable device including an electrode that transmits and receives an electrical signal through a body while contacting the body, the method comprising:

generating, by a clock generator, a clock signal;

generating, by a signal generator, a first synchronization signal based on the clock signal;

determining an operation mode of the wearable device;

transmitting the first synchronization signal to the electrode in response to determining the operation mode of the wearable device as a master mode;

blocking a connection between the signal generator and the electrode in response to determining the operation mode of the wearable device as a slave mode; and

adjusting at least one of a frequency or a phase of the clock signal based on a second synchronization signal received through the electrode from another wearable device worn on the body, in the slave mode.

12. The method of claim 11 , wherein the adjusting of the at least one of the frequency or the phase of the clock signal comprises:

synchronizing the first synchronization signal with the second synchronization signal by adjusting at least one of the frequency or the phase of the clock signal.

13. The method of claim 11 , wherein the determining of the operation mode of the wearable device comprises:

determining the operation mode of the wearable device as the slave mode, based on a signal with a period greater than or equal to a predetermined value being received through the electrode.

14. The method of claim 11 , wherein the determining of the operation mode of the wearable device comprises:

determining the operation mode of the wearable device as the master mode, based on a signal with a period greater than or equal to a predetermined value not being received for a predetermined period of time.

15. The method of claim 11 , further comprising:

transmitting a reset signal to the signal generator in response to detecting a falling edge of the second synchronization signal.

16. The method of claim 11 , further comprising:

processing a sound signal received from a microphone based on the clock signal and the first synchronization signal.

17. The method of claim 16 , further comprising:

wirelessly communicating with the other wearable device and receiving a sound signal received from a second microphone provided in the other wearable device; and

performing beamforming based on the sound signal received from the microphone and the sound signal received from the second microphone.

18. The method of claim 11 , further comprising:

wirelessly communicating with an external terminal and receiving a sound signal from the external terminal; and

processing the sound signal received from the external terminal based on the clock signal and the first synchronization signal.

19. The method of claim 18 , further comprising:

transmitting the first synchronization signal to the external terminal.

20. The method of claim 11 , further comprising:

changing the operation mode of the wearable device to the slave mode, based on the wearable device being operating in the master mode for a predetermined period of time.