Display device and operating method thereof

1. A display device comprising:

a display;

an audio output interface configured to output sound;

a wireless communication interface connected to a plurality of external speakers; and

a controller configured to:

establish a role of each of the plurality of external speakers based on distance information between the display device and the external speaker and direction information of the external speaker including a direction in which the external speaker is located with respect to the display device;

transmit an audio signal to each of the plurality of external speakers according to the established role; and

obtain a Bluetooth signal strength of each of the plurality of external speakers, and obtain distance information between the display device and the external speaker based on the Bluetooth signal strength.

2. The display device of claim 1 , wherein the controller is configured to establish the role of each of the plurality of external speakers based on at least one of a location, a sound pressure, and a reproduction band of each of the plurality of external speakers.

3. The display device of claim 1 , further comprising:

a user input interface configured to receive a signal from a remote control device,

wherein the controller is configured to:

detect a location of the remote control device;

recognize the location of the remote control device as a user's viewing location; and

correct the audio signal to be transmitted to each of the plurality of external speakers based on the user's viewing location.

4. The display device of claim 1 , wherein the controller is configured to obtain location information of each of the plurality of external speakers, and recognize an average position of a plurality of pieces of location information corresponding to the plurality of external speakers as a user's viewing location.

5. The display device of claim 1 , wherein the controller is configured to obtain a user's viewing location and correct an audio signal to be transmitted to each of the plurality of external speakers based on the user's viewing location and the role of each of the plurality of external speakers.

6. The display device of claim 1 , wherein the controller is configured to determine a multi-channel type based on at least one of a number and a reproduction band of the plurality of external speakers connected through the wireless communication interface.

7. The display device of claim 6 , wherein the controller is configured to establish an audio channel for each of the plurality of external speakers according to the multi-channel type.

8. The display device of claim 6 , wherein the controller is configured to up-mix an input audio signal according to the multi-channel type.

9. The display device of claim 6 , wherein the controller is configured to determine one of 3.1ch, 5.1ch, 5.1.2ch, 7.1.4ch, 9.1.2ch, 9.1.4ch, 11.1ch, and 22.2ch as the multi-channel type.

10. The display device of claim 6 , wherein the controller is configured to control the display to display a guide for guiding a speaker arrangement according to the determined multi-channel type.

11. The display device of claim 10 , wherein the controller is configured to control the display to display a guide including at least one of a current location of each of the plurality of external speakers, a recommended speaker location, and a location change guide icon.

12. The display device of claim 1 , wherein the controller is configured to obtain a reproduction band of each of the plurality of speakers by recognizing test sound output from the plurality of external speakers.

13. A operating method of a display device comprising:

connecting, by a wireless communication, to a plurality of external speakers;

establishing, by a controller, a role of each of the plurality of external speakers based on distance information between the display device and the external speaker and direction information of the external speaker including a direction in which the external speaker is located with respect to the display device;

transmitting, by a controller, an audio signal to each of the plurality of external speakers according to the established role;

obtaining a Bluetooth signal strength of each of the plurality of external speakers; and

obtaining distance information between the display device and the external speaker based on the Bluetooth signal strength.

14. The operating method of the display device of claim 13 , wherein the establishing of the role of the each of the plurality of external speakers is based on at least one of a location, a sound pressure, and a reproduction band of each of the plurality of external speakers.

15. The operating method of the display device of claim 13 , further comprising:

receiving, by a user input interface, a signal from a remote control device;

recognizing the location of the remote control device as a user's viewing location; and

correcting the audio signal to be transmitted to each of the plurality of external speakers based on the user's viewing location.

16. A display device comprising:

a display;

an audio output interface configured to output sound;

a wireless communication interface connected to a plurality of external speakers; and

a controller configured to:

establish a role of each of the plurality of external speakers based on distance information between the display device and the external speaker and direction information of the external speaker including a direction in which the external speaker is located with respect to the display device;

transmit an audio signal to each of the plurality of external speakers according to the established role; and

obtain direction information of the external speaker using at least one of AOA (Angle of Arrival) and AOD (Angle of Departure).