To provide an information processing unit that applies format processing corresponding to devices of a plurality of kinds of pairs.

An input image from an image input section B10 is temporarily stored in a memory B9, a changeover switch S2 is used to select a processing section corresponding to an opposite party for actual communication among a plurality of image processing sections B5-B8 according to specifications of a communication opposite party to apply formating, and a corresponding demodulation processing section B3 or B4 is used to modulate data for the transmission to the opposite device. In the case of reception, an image is displayed on an image display processing section B11 in the reverse path.