Patent ID: 8224158

Claim:
A method for setting a playback environment for a recording medium, the method comprising: loading, by a device, a start-up file into a temporary storage area, the start-up file including server access information, the server access list comprising a list of external servers to be accessed; setting, by the device, a system environment according to system environment elements prior to reproducing A/V data recorded on the recording medium, wherein the system environment elements correspond to at least one of playback right level information, region code information, language information of additional contents associated with the A/V data, and memory management information, wherein the memory management information identifies a space of the temporary storage area for storing at least one of the start-up file and the additional contents, and wherein the additional contents are to be preloaded in the temporary storage area and are differently designated according to the playback right level information and the region code information; determining, by the device, an availability of the additional contents based on control data received through a communication network from an external server, the external server storing the additional contents and the control data, the control data listing the additional contents to be preloaded; preloading, by the device, the additional contents in the temporary storage area as a result of the determining step, the additional contents received from the recording medium or the external server; and reproducing, by the device, the A/V data and the additional contents loaded in the temporary storage area according to the control data, wherein the reproducing of the A/V data and the additional contents is restricted based on a comparison of the playback right level information from the start-up file and playback right level information set in a player, and wherein said additional contents includes at least one of an HTML file, an image file and a sound file.