The display apparatus includes a receiver configured to receive a first image set, a storage configured to store a second image set with a size corresponding to the first image set, an image processor configured to receive the first image set and the second image set in units of frames and to synthesize the first image set and the second image set to generate a final image set, and a display configured to display the final image set. The image processor detects a region of the second image set, to be synthesized with the first image set, receives only partial data corresponding to the detected region with respect to the second image set of a next frame after the region is detected, and synthesizes the some received data and the first image set to generate a final image set.