SCRAMBLE PROCESSING DEVICE, DESCRAMBLE PROCESSING DEVICE, SCRAMBLE PROCESSING METHOD, AND DESCRAMBLE PROCESSING METHOD

摘要

A scramble processing device (101) comprises a predictor (126) for predicting the feature quantity of an exchanged object block with reference to the feature quantities of adjacent blocks of the exchanged object block, a candidate extractor (123) for extracting an exchange candidate of the exchange object block from blocks other than the exchanged object block on the basis of the predicted feature quantity, and a scramble exchanger (122) for selecting the exchange object block from the exchange candidates by analyzing the feature quantities of the exchanged object block and the exchange candidate, to exchange the selected one with the exchanged object block.