1. Field of the Invention
The present invention relates to a recording medium, reproducing method thereof and reproducing apparatus thereof, and more particularly, to a method of recording auxiliary data such as a text subtitle stream and reproduction management information for reproducing the auxiliary data efficiently in a recording medium, a recording medium reproducing method using the same and a reproducing apparatus using the same.
2. Discussion of the Related Art
Generally, an optical disc on which a large volume of data is recordable is widely used as an optical record medium. Recently, many efforts are made to develop a new high density optical record medium (HD-DVD), on which video data of high definition and audio data of high quality can be recorded and stored, such as a Blu-ray disc (hereinafter abbreviated BD) and the like.
The Blu-ray disc (BD) that is a sort of a next generation HD-DVD technology is the next generation optical record solution enabling to be fully equipped with data to remarkably surpass the previous DVD, and the technology specifications of global standardizations for the BD are being established together with other digital equipments.
Moreover, although many efforts are made to develop optical record players adopting the BD specifications, there are many difficulties in developing a complete optical record player since the BD specifications fail in being fully established yet.
Specifically, in order to efficiently reproduce the data recorded in the BD, main AV data and various kinds of data such as text subtitle information as auxiliary data associated with the main AV data for user's convenience should be provided. Moreover, management information for reproducing the main and auxiliary data recorded in the optical disc should be systematized to provide.
However, the current BD specifications fail to be equipped with the unified specifications for the text subtitle stream file, whereby a great deal of limitation is put on full-scale development of the BD-based optical record players. Specifically, such limitation causes difficulty to recording and reproducing the text subtitle in the optical disc.