DATA OPERATION UNIT, ITS METHOD AND PROGRAM SUPPLY MEDIUM SUPPLYING DATA OPERATION PROGRAM

摘要

PROBLEM TO BE SOLVED: To enhance a memory efficiency and to reduce the processing time by controlling an expression form in an operation processing to expand and decode run length coded data to change an operation quantity. SOLUTION: A CPU 2 refers to an processing sequence of an image graph 13 in a storage section 6 to process expansion decoding processing so as to be close to a high-order node of the image graph to the utmost in the case of applying optimizing processing of the image graph to express the kind and the sequence of operations in the unit of the operations to input image data that are compression coded according to a processing program in a program area 12 in the storage section 6 thereby conducting expansion decoding processing as later as possible and accelerates the coding expansion processing by approaching the compression code processing conducted again as close as possible to a low-order node. Thus, the arithmetic quantity is reduced by controlling an expression form of data of a series of processing that attains processing in the unit of various operations as a data stream of the compression coding form.