Abstract: In an apparatus and method according to the present invention, image data is read and stored in a recording medium. If the size of the original image data is determined as being different from the display size of a monitor apparatus, the original image data is converted to change the size of the original image to the display size of the monitor apparatus. The converted image data (display image data) is also stored in the recording medium. Therefore, image data whose size corresponds to the display size can be read from the recording medium when displaying the image, thus reducing the time required to display the image on a monitor apparatus.

Abstract: In a communication system comprising a plurality of interface circuits (11-1 to 11-3) for communicating with a communication device through a data bus (13) and an arbitrator circuit (12) for arbitrating a data bus employment among the interface circuits when the interface circuits communicate with the communication device through the data bus. The arbitrator circuit is connected to the interface circuits by first through third buses (21 to 23). The interface circuits have individual addresses which are different from one another. Each of the interface circuits supplies the first bus with a demand signal which is representative of a level of employing the data bus. The arbitrator circuit supplies a priority address to the second bus in accordance with the demand signal. Each of the interface circuits supplies a conflict address to the first bus in response to the priority address.