First a standard image to which a link is defined is displayed. If a user operates a input device and if the viewpoint enters into the first link boundary, and if the information indicating that a resume operation is required does not exist the first frame of moving image data is read out and displayed on the display device as a still image. If the viewpoint enters into the second link boundary, playing back and displaying of the moving image and is started. If the viewpoint moves out from the second link boundary, a frame displayed when the playback of the moving image is suspended is displayed as a still image and the resume point is stored. If the viewpoint moves out of the first link boundary, a standard image is displayed.