PICTURE INFORMATION PROCESSING METHOD

摘要

PURPOSE:To improve a processing speed during processing when secret information is written in a memory, by performing encoding compression by a block encoding method and then converting resolution information. CONSTITUTION:Resolution information phi in at least one block of picture information encoded by the block encoding method is sent and processed by a shift reigister 10 having N stages corresponding to the number N of picture elements during the processing when the secret information is written in the memory, obtaining new resolution information phi'. This new resolution information and density representative values a0 and a1 are regarded as information for preservation or information for a reproduced picture. When the processing is carried out during the reproduction of picture information after writing to the memory by mere block encoding, the resolution information is converted before decording.