Patent ID: 8374494

Claim:
A method of an image data process, comprising the steps of: a) designating an image size selected from a plurality of image sizes and a compression mode selected from a plurality of compression modes respectively; b) changing the image size in accordance with designation by said designating step; c) compressing said changed image data in a combination of a DCT, a quantization and a coding process in accordance with designation by said designating step; d) adding additional data corresponding to said image size and said compression mode designated by said designating step to the compressed image data; e) recording said compressed image data and said added data added by said adding step on a recording medium; f) reproducing said compressed image data recorded by said recording step; g) detecting said added data recorded by said recording step; h) up converting an image resolution of said reproduced image data in accordance with said added data; and i) displaying said image data up converted by said up converting step.