Patent ID: 8676028

Claim:
A method for reproducing additional data associated with Audio/Video data (AV data), the method performed by at least one device and comprising: retrieving the AV data; 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 corresponds to the AV data from an external server 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 wherein a single additional data is associated with plural AV data or plural additional data are associated with a single AV data; transmitting the additional data to a decoding unit of the at least one device through a buffer of the at least one device, using the size information, wherein the time information is associated with synchronization of the AV data and the additional data; wherein the size information of the buffer used for transmitting the additional data to a decoding unit of the at least one device indicates a buffer size needed for storing the additional data in the buffer; decoding, by the decoding unit, the additional data synchronously with the AV data; and displaying the AV data with the decoded additional data.