COMPRESSION PROCESSING DEVICE AND COMPRESSION PROCESSING METHOD

摘要

A division unit (2) divides each symbol string of input data in which the processing up to zigzag scanning/run-length has been completed into a plurality of subsets whose appearance frequencies are similar to one another depending on the difference between the appearance frequencies. A table creation unit (3) scans each of the subsets to create a Huffman coding table for each of the subsets. A coding unit (4) executes a processing for Huffman-coding each of the subsets to all the subsets by using the Huffman coding table created therefor.