An apparatus comprises an analyzer that analyzes a file, a convertor that converts dynamic range of image data, and a controller that outputs image data in the file to a display on the basis of the analysis, wherein the controller outputs a main image in the file to the display device if the display supports the dynamic range of the main image, outputs sub image to the display device if the display does not support the dynamic range of the main image and the sub image is included in the file, and uses the converter to convert the main image into image data having a dynamic range supported by the display to output the image data obtained through the conversion if the display does not support the dynamic range of the main image and the sub image is not included in the file.