Abstract: An audio output apparatus a display configured to display an output image; a speaker configured to output audio; and a processor configured to control the speaker to output music content as the audio, determine, based on meta data and external environment information, an image category corresponding to the music content among presorted image categories, determine at least one image corresponding to the determined image category as a background image, and control the display to display the determined at least one image as the output image.

Abstract: A display apparatus and a method of controlling a screen thereof are provided. The method includes displaying a rectangular screen including a digital image in a display area, receiving information to modify a shape of the rectangular screen, and modifying and displaying the shape of the rectangular screen based on a coordinate value of a horizontal axis of the display area, and the received information. A height of the modified screen decreases as the height is closer to the coordinate value, and the digital image decreases in size as the digital image is closer to the coordinate value to correspond to the height.