Patent ID: 7778523

Claim:
A method for reproducing Audio/Video data (AV data) and additional data associated with the AV data, the method being performed by a device and comprising: retrieving the AV data from a storage medium; obtaining listing information including a list of navigation information; obtaining the navigation information corresponding to the AV data using the listing information, wherein the navigation information includes identification information, location information, time information, and size information used for processing the additional data; receiving the additional data which is corresponding to the AV data from the storage medium using the identification information and the location information, wherein the identification information is an identifier assigned to the additional data, and the location information indicates where the additional data is located; and reproducing the additional data with the AV data using the time information and size information, wherein the size information is used for buffering the additional data on a buffer of the device, and wherein a single additional data is capable of being associated with plural AV data or plural additional data are capable of being associated with a single AV data.