Patent ID: 8385720

Claim:
A playback apparatus that plays back content recorded on an optical disc, the playback apparatus comprising: a local storage; a reading unit operable to read the content recorded on the optical disc and content recorded on the local storage; and a playback unit operable to play back, as a virtual disc, the content recorded on the optical disc in combination with the content recorded on the local storage, wherein the content recorded on the optical disc has a directory structure including a plurality of files, on the local storage, one or more replacement files to replace one or more of the files included in the directory structure are recorded, on the optical disc, unification information for realizing the virtual disc is recorded, the unification information including information showing the one or more of the files to be replaced in correspondence with the one or more replacement files, the virtual disc is generated by performing a file replacement to the directory structure based on the unification information, and the file replacement is to read the one or more replacement files in place of the one or more of the files to be replaced.