Information processing device and method

An information processing device for encoding image data and generating encoded data, comprising:

• rearranging means for rearranging beforehand coefficient data split into every frequency band, in an order in which synthesizing processing is performed for synthesizing coefficient data of a plurality of sub-bands split into frequency bands to generate image data, for every line block including image data of a number of lines worth necessary to generate one line worth of coefficient data of a lowest band component sub-band;
• encoding means for encoding coefficient data, rearranged by said rearranging means, every line block, and generating encoded data;
• storage means for storing encoded data generated by said encoding means;
• calculating means for calculating the sum of code amount of said encoded data, each time said storage means store a plurality of said line blocks worth of encoded data;
• and
• output means for outputting said encoded data stored in said storage means, in the event that the sum of code amount calculated by said calculating means reaches said target code amount.