Patent ID: 8032013

Claim:
An optical disc having a data structure for managing a text subtitle, the optical disc comprising: a recording area storing a main file and at least one separate text subtitle file, the main file including at least one of audio and video data streams as transport packets and bitmap subtitle stream as transport packets that have a unique packet identifier distinguishable from a packet identifier of the at least one of audio and video data streams, and each separate text subtitle file including a single text subtitle stream as transport packets, the transport packets of the text subtitle stream having a packet identifier that is distinguishable from the packet identifier of the at least one of audio and video data streams, and the text subtitle stream having the transport packets with a same packet identifier, wherein the bitmap subtitle stream and the at least one of audio and video data streams are multiplexed in the main file while the text subtitle stream is separate from the main file, wherein either the text subtitle stream or the bitmap subtitle stream is reproduced together with the at least one of audio and video data streams, both of the text subtitle stream and the bitmap subtitle stream not being reproduced at the same time, wherein if the bitmap subtitle stream is used for a display of the subtitle, the bitmap subtitle stream is reproduced together with the at least one of audio and video data streams by using the main file, wherein if the text subtitle stream is used for a display of the subtitle, the text subtitle stream is reproduced together with the at least one of audio and video data streams by using the main file and the at least one separate text subtitle file.