Patent ID: 8478105

Claim:
A media player comprising: a data retriever configured to retrieve data from a file recorded on a DVD medium from which content is run and configured to control overall behavior of the DVD medium, and configured to retrieve data from a file for controlling behavior of a video title set recorded on the DVD medium, both sets of data including an address that indicates a position of recording on the DVD medium of attribute information that is related to a unit of content provided on the DVD medium for which the position of recording varies as the unit of content is modified for recording; an ID determination unit configured to determine an ID for identifying the unit of content provided by the DVD medium in accordance with the data retrieved from the file for controlling the overall behavior of the DVD medium and the data retrieved from the file for controlling the behavior of the video title set, such that, given normal image content and special image content resulting from partly-modified normal image content, the ID determination unit determines an ID for the special image content that is different from the ID for the normal image content; and a related information acquisition unit configured to acquire, from an external device that stores information related to the unit of content provided by the DVD medium, information related to the unit of content provided by the DVD medium and associated with the ID determined by the ID determination unit, by communicating the determined ID to the external device.