Abstract: An image compression apparatus of this invention has an input unit configured to input image data of a moving picture, a first encoding processor configured to apply compression-encoding processing to the image data input from the input unit using a plurality of compression-encoding modes, a remaining battery level management unit configured to manage the remaining battery level of hardware on which the image compression apparatus is mounted, and a first controller configured to limit some of the plurality of compression-encoding modes which are configured to be processed by the first encoding processor when the remaining battery level managed by the remaining battery level management unit becomes lower than a predetermined setting value.

Abstract: The present invention relates to a main memory space reclaiming apparatus used in a virtual memory computer system. In this apparatus, a page-out daemon process periodically scans page frames of a main memory and reclaims main memory pages which have not been accessed recently. An operating system includes a unit for acquiring the amount of free main memory, and a unit for controlling a rate at which the page-out daemon process scans the page frames according to the amount of free main memory.