29. An apparatus for reproducing text subtitle streams, the apparatus comprising: a decoder configured to decode the at least one text subtitle stream selected from an external source, each text subtitle stream including text data to be displayed within a region of a display screen, first information specifying a global style of the region, and second information specifying a local style for a portion of the text data; and a controller configured to read a playlist including at least one playitem and first and second subplayitems, the playitem specifying a time based playing interval from an in-time until an out-time associated with at least one audio/video stream, the first subplayitem specifying a time based playing interval from an in-time until an out-time associated with the at least one text subtitle stream, the first subplayitem for a reproducing of the text subtitle stream being synchronized with the playitem, the second subplayitem for a reproduction of browsable slideshow being not synchronized with the playitem and to control the decoder to decode the text subtitle stream using the first information and the second information.
29. An apparatus for reproducing text subtitle streams, the apparatus comprising: a decoder configured to decode the at least one text subtitle stream selected from an external source, each text subtitle stream including text data to be displayed within a region of a display screen, first information specifying a global style of the region, and second information specifying a local style for a portion of the text data; and a controller configured to read a playlist including at least one playitem and first and second subplayitems, the playitem specifying a time based playing interval from an in-time until an out-time associated with at least one audio/video stream, the first subplayitem specifying a time based playing interval from an in-time until an out-time associated with the at least one text subtitle stream, the first subplayitem for a reproducing of the text subtitle stream being synchronized with the playitem, the second subplayitem for a reproduction of browsable slideshow being not synchronized with the playitem and to control the decoder to decode the text subtitle stream using the first information and the second information. 30. The apparatus of claim 29 , wherein the controller is configured to read clip information files for the audio/video stream and the text subtitle stream, each of the clip information files including timing information for mapping a presentation time stamp (PTS) with a source packet number (SPN) of the audio/video stream or the text subtitle stream.