Patent ID: 8380048
Filing Date: 2013-02-19
Classification: G11B,H04N

Abstract:
1. A playback apparatus that plays back a read-only optical disc and a virtual package, the playback apparatus comprising: a read-only optical disc drive; a local disk; a playback control engine; and a download unit operable to download one or more update kits each of which includes a new version of the read-only optical disc and writes the update kits in separate sub-directories corresponding to the respective versions of the read-only optical disc, wherein the virtual package is a combination of the read-only optical disc with one of the update kits separately stored for each version, when playing back the virtual package, the playback apparatus supplements with the update kit a function of a package released on the read-only optical disc, the supplementing is done by making a selection so that if a new version of a file on the read-only optical disc is included in the update kit, the file is taken from the sub-directory corresponding to the new version and thus an AV stream and playlist information included in the update kit is supplied to the playback control engine.