1. A display apparatus that displays an image, comprising: image converting means for converting an input image signal into a high-quality image signal higher in quality than the input image signal according to an arithmetic operation between the input image signal and a tap coefficient obtained by learning performed in advance; and display control means for causing display means to display an image corresponding to the high-quality image signal in a display format determined by learning performed using a super high-quality image signal higher in quality than the high-quality image signal, wherein the display format determined by learning is one of plural display formats.