Patent ID: 8090765

Claim:
A method of reproducing information stored on a data recording medium using a playing device connected to a communication network, the method comprising: loading a start-up file into a memory, the start-up file including information associated with a system environment; setting the system environment according to the start-up file; sending version information and a download request to a server via the communication network, wherein the version information includes at least one of disk version information and content version information; re-setting the system environment based on a file received from the server in response to the version information, the file including a sync file for the version information; determining if second information associated with first information is available through the communication network in response to the download request, when a specific service mode is selected by a user, the first information having audiovisual data recorded on the data recording medium and a play start time ST, and the second information having auxiliary information associated with the audiovisual data; receiving the second information from the communication network as a result of the determining step, the second information including a time stamp relative to another play start time of another playing device which is playing the same data recording medium and has provided the second information and being linked with the version information; comparing the time stamp of the second information to a current play time relative to the play start time ST; and when the time stamp of the second information precedes the current play time, searching a play time of the playing device to the time stamp of the second information, and reproducing the audiovisual data from the searched location along with the second information with respect to the set play time.