Patent ID: 7961579

Claim:
An information reproduction apparatus having a tray on which an information recording medium is mountable, determining a type of an information recording medium mounted on the tray from among a plurality of types of information recording media, the plurality of types of information recording media being reproducible by the information reproduction apparatus and each having a same internal diameter, and reproducing information of the determined type of the information recording medium, the information reproduction apparatus comprising: a priority list storage means for storing a priority list for each of the plurality of types of information recording media, the priority list holding an order of the plurality of types of information recording media to be used to determine the type of the mounted information recording medium; a medium selection information input means for inputting medium selection information indicating which type of the plurality of types of information recording media is selected; a first priority list modifying means for: obtaining the priority list for the selected type of information recording medium through the medium selection information input means from each priority list stored in the priority list storage means; and modifying the obtained priority list such that the selected type of information recording medium through the medium selection information input means is set to a first priority in the modified priority list; a medium determination means for determining the type of the mounted recording medium in accordance with the order of the modified priority list; a relation data storage means for storing relation data in which each type of some media that have been reproduced by the information reproducing apparatus in the plurality of types of information recording media is correlated with a number of reproductions of a corresponding type of some media that have been reproduced thereby for each of the plurality of types of information recording media selectable by the medium selection information input means; a relation data update means for updating the number of reproductions included in the relation data, the number of reproductions corresponding to the selected type of information recording medium and the type of reproduced information recording medium, and for storing the relation data with the updated number of reproductions in the relation data storage means; a second priority list modifying means for modifying the priority list for the type of the selected information recording medium, based on the relation data stored in the relation data storage means; and a modified priority list reflecting means for storing the priority list modified by the second priority list modifying means, in the priority list storage means.