| 摘要 |
The invention provides a character and picture data compression apparatus which can collectively compress document data of the character code form and still picture data and moving picture data of the bit map form. A conversion section converts document data of the character code form into those of the bit map form. A display image composition section composes the document data of the bit map form, still picture data of the bit map form and a first one frame of moving picture data into a display image of the first page, and then produces, for each of the succeeding frames, a display image wherein the moving picture data portion in the display image of the first page is replaced with moving picture data of the frame. A difference processing section calculates, for each of the display images of the succeeding pages, a difference from the display image of the immediately preceding page in the bit map form. A bit map data compression section successively receives the display image of the first page and the display images of the succeeding pages obtained by the difference processing section and performs compression of the images in units of one page.
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