Abstract: An audio output apparatus includes memory storing instructions; a display; and at least one processor including processing circuitry, wherein the instructions, when executed by the at least one processor individually or collectively, cause the audio output apparatus to: control, based on a background user interface (UI) indicating a state of replaying contents being displayed, display a plurality of first UIs along a plurality of arcs that divide the background UI into a plurality of track regions; and control, based on a user manipulation for selecting an item of a plurality of items included in the contents, the display to change a first UI corresponding to the item among the plurality of displayed first UIs to a second UI corresponding to the item, and display the second UI.

Abstract: An electronic apparatus may include: a sensor configured to obtain ambient information of a transparent display; memory configured to store at least one instruction; and at least one processor, wherein the at least one instruction, when executed by the at least one processor individually or collectively, causes the electronic apparatus to: obtain masking information corresponding to a real object adjacent to the transparent display based on the ambient information; obtain a virtual object image to be displayed on the transparent display; generate a display image to be displayed on the transparent display by correcting a shape of the virtual object image based on the masking information; and output the display image to the transparent display.