Patent ID: 7274478
Filing Date: 2007-09-25
Classification: H04N

Abstract:
1. An ink-jet printing apparatus for scanning an ink-jet head having plural nozzles for emitting ink onto a recording medium in a main scanning direction and for receiving compressed image data from an image sensing device to print, comprising: a memory divided into a plurality of blocks, configured to store the received compressed image data on a block-by-block basis; an expansion unit configured to expand the compressed image data stored in the memory into image data necessary for the printing operation by the ink-jet head; a determination unit configured to determine whether compressed image data corresponding to image data for the printing operation of one scanning of the ink-jet head, to be expanded by said expansion unit, is stored in the memory; and a requesting unit adapted to request the image sensing device for compressed image data, wherein said request unit requests the image sensing device for an amount of compressed image data more than a differential amount between the amount of compressed image data stored in said memory and the amount of compressed image data corresponding to the image data for the printing operation of one scanning, in a case where it has been determined by said determination unit that compressed image data corresponding to the image data for the printing operation of one scanning is not stored in said memory.