Patent ID: 8185541

Claim:
An information processing apparatus comprising: a communication unit configured to receive, from a reproduction device that reproduces content recorded on a loaded recording medium, content forming information regarding the structure of the content, the content forming information including a number of items of data forming content recorded on the recording medium and a size of each of the items of data; a degree-of-similarity calculation unit configured to compare the content forming information received by the communication unit with content forming information registered in advance for each package of an information recording medium in a predetermined database and calculate a degree of similarity between the content forming information received by the communication unit and the content forming information registered in advance in the database, the degree-of-similarity calculation unit calculating the degree of similarity based on the number of items of data forming content recorded on the recording medium and the size of each of the items of data; and a package determination unit configured to determine the package of the information recording medium loaded into the reproduction device by using the degree of similarity calculated by the degree-of-similarity calculation unit.