1. A camera-integrated type digital image data recording apparatus comprising: a) an image pickup unit, adapted to output digital image data corresponding to a selected image size, wherein said image pickup unit includes a sensor unit, an focus control unit, an exposure control unit and a white balance control unit; b) a selecting unit, adapted to select one of a plurality of image sizes and one of a plurality of compression modes, wherein the selection of an image size and the selection of a compression mode are performed individually; c) an image size control unit, adapted to set the image size selected by said selecting unit; d) a compression mode control unit, adapted to set the compression mode selected by said selecting unit; e) a quantization control unit, adapted to determine a quantization parameter corresponding to the compression mode set by said compression mode control unit; f) a compression unit, adapted to compress the digital image data in accordance with the compression mode set by said compression mode control unit, wherein said compression unit includes a DCT unit, a quantization unit and a coding unit; g) an adding unit, adapted to add additional data corresponding to the image size and the compression mode selected by said selecting unit to the digital image data compressed by said compression unit; h) a recording unit, adapted to record the compressed digital image data and the additional data; i) a reproducing unit, adapted to reproduce the recorded digital image data; and j) a display unit mounted on said apparatus, adapted to display the digital image data output from said image pickup unit or the digital image data reproduced by said reproducing unit.