Recording Medium Containing Supplementary Service Information For Audio/Video Contents, and Method and Apparatus of Providing Supplementary Service Information of the Recording Medium

An apparatus comprising:

• a user interface configured to receive and/or output information;
• a controller configured to:
• receive, via the user interface, a playback request for a specific content data,
• retrieve, according to the playback request, a data stream, management information, and linking information, wherein the data stream includes the specific content data and a language-formatted data, the specific content data consisting of at least one content segmented unit and the language-formatted data consisting of at least one language-formatted segmented unit, wherein each content segmented unit and each language-formatted segmented unit has an identifier (ID) and a presentation time information, and wherein the language-formatted data is configured for being reproduced together with the specific content data,
• separate the data stream into the specific content data and the language-formatted data using the management information, wherein the management information indicates whether each segmented unit is a content segmented unit or a language-formatted segmented unit based on each segmented unit's identifier, and
• associate the one or more content segmented units with at least one language-formatted segmented unit using the linking information, wherein the linking information assigns reference information to the specific content data for associating the specific content data with the language-formatted data;
• a decoder configured to decode each associated content segmented unit at specific times determined by the presentation time information included in each content segmented unit to obtain decoded content data, and decode each associated language-formatted segmented unit to obtain decoded language-formatted data;
• and
• a display unit configured to synchronously display the decoded content data and the decoded language-formatted data using the presentation time information included in each language-formatted segmented unit.