To reduce the amount of data of moving image data for displaying a fade-in display and a scene with few movements and to perform moving image performance with full presence.

A data reproducing means 80c includes a still object image switching means 80cb for switching and displaying a motion object image on an image display device to a still object image (an image (b)) according to still object image datal; and a still image reproducing means 80cc for performing still image reproducing processing (processing for displaying an image (c) from an image (b)) on the image display device during an interruption interval. Furthermore, the data reproducing means 80c includes a composite display means 80cf for performing composite display using two or more frame data of varying priorities in back-and-forth directions by superimposing tow or more frame data continuously extended by a data extending means 80b in response to priorities specified by a priority specifying means 80d.