To effectively reduce storage capacity required for displaying a GUI image, or the like in electronic equipment.

When background image data and a plurality of display object data selectively synthesized to the background image data for display are stored in a prescribed storage means, specified and selected display object data in the display object data are stored in the storage means apart from the background image data as image data synthesized to the background image data by performing compression coding to the synthesized image data. When a synthesized image is displayed by the specified display object data and the background image data, the image data that are stored in the storage means and is subjected to compression coding are extended for display.