an image data receiving section that repeatedly receives image data, wherein: (i) the image data represents a downscaled image obtained by downscaling an original image, (ii) the image data is transmitted from a transmitting device, (iii) the transmitting device further transmits feature-amount data that is associated with the image data and that represents at least one of a feature amount of the original image and a feature amount that is a parameter used in encoding of the downscaled image, and (iv) the transmitting device transmits prioritizes the transmission of the feature-amount data over transmission of the image data associated with the feature-amount data;

a to-be-displayed-image generating section that generates a to-be-displayed image on a basis of the image data;

a substitute image generating section that, on a basis of first image data that is the image data received at a first timing, generates a substitute image that is an image different from the to-be-displayed image generated on a basis of the first image data and that corresponds to second image data that is the image data planned to be received at a second timing that comes after the first timing; and

a display control section that causes either one of the to-be-displayed image generated on a basis of the second image data and the substitute image generated on a basis of the first image data to be displayed according to success or failure of the reception of the second image data, wherein

the substitute image generating section starts the generation of the substitute image corresponding to the second image data based on the first image data before the success or failure of the reception of the second image data is confirmed.