Patent ID: 8306339

Claim:
An information processing device comprising: bitplane expanding means for expanding image data into bitplanes as sets of bits at identical places in each unit of a predetermined number of pieces of data each having a bit depth of a plurality of bits; coding means for coding said image data expanded by said bitplane expanding means in each said bitplane in predetermined order; selecting means for, when a compression ratio of compressed data of each said bitplane, said compressed data being generated by coding by said coding means, is higher than a target compression ratio, selecting said compressed data as a result of coding of said image data, and when the compression ratio of the compressed data of each said bitplane is equal to or lower than the target compression ratio, selecting non-compressed data, said non-compressed data being said image data of each said bitplane before being coded by said coding means, as a result of coding of said image data; and selection controlling means for controlling said coding means to stop a coding process and selecting said non-compressed data for a bitplane situated at a position subsequent to a bitplane for which said non-compressed data is selected by said selecting means in said predetermined order.