Patent ID: 7986866

Claim:
A playback device for playing back a digital stream and an application in conjunction with each other, comprising: a drive unit operable to load a recording medium; a playback unit operable to play back a digital stream recorded on the loaded recording medium; and a platform unit operable to execute an application recorded on the loaded recording medium to perform playback control, wherein the playback unit has a plurality of real parameters used for special playback control, the plurality of real parameters being specific to the playback device, the platform unit includes: an execution unit operable to interpret and execute the application recorded on the loaded recording medium; and a module unit having a first function of providing the application with one of the real parameters upon request by the application, and a second function of, upon request by the application, which has received the provision of the real parameter, to perform special playback control using the real parameter, controlling the playback unit such that the special playback is performed on the digital stream based on the real parameter used for the request of the special playback control.