| CPC H04N 7/147 (2013.01) [G06F 3/167 (2013.01); H04N 5/44504 (2013.01); H04N 21/42203 (2013.01); H04N 21/4223 (2013.01); H04N 21/4316 (2013.01); H04N 21/4394 (2013.01); H04N 21/44008 (2013.01); H04N 21/47 (2013.01); H04N 21/4788 (2013.01); G06F 3/017 (2013.01)] | 22 Claims |

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1. A display apparatus, comprising:
a communication interface configured to communicate with another display apparatus;
a display; and
a processor configured to:
receive audio data of the another display apparatus from the another display apparatus through the communication interface;
control the display to display a video call user interface (UI) corresponding to the audio data;
determine whether a volume level corresponding to the audio data is greater than or equal to a predetermined level, and
based on determining that the volume level is greater than or equal to the predetermined level, change a display size of the video call UI and display an edge of the video call UI in a predetermined color.
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