Content reproduction apparatus and subtitle reproduction method

A content reproduction apparatus comprising:

• a content reproduction unit configured to reproduce a content data item from a recording medium, the recording medium storing the content data item;
• an acquiring unit configured to acquire, via a network, a plurality of segment data items which are described in a structured document description language, the segment data items corresponding, respectively, to a plurality of time periods which are segments of a reproduction time period required for reproducing whole of the content data item, and each of the segment data items, which corresponds to each of the time periods, including a group of subtitle data items to be reproduced within the each of the time periods;
• and
• a subtitle reproduction unit configured to reproduce the group included in the each of the segment data items while a partial content data part which is to be reproduced within the each of the time periods is reproduced by the content reproduction unit.

A content reproduction apparatus comprising:

• a reproduction unit configured to reproduce a content data item from a recording medium, the recording medium storing the content data item and a plurality of segment data items which are described in a structured document description language, a subtitle reproduction control information item and a common subtitle data item, (a) the segment data items corresponding, respectively, to a plurality of time periods which are segments of a reproduction time period required for reproducing whole of the content data item, and each of the segment, which corresponds to each of the time periods, including a group of subtitle data items to be reproduced within the each of the time periods, (b) the subtitle reproduction control information item representing the time periods and the segment data items corresponding to them, respectively, (c) the common subtitle data item including a style information item indicating a subtitle display region and a display form of each of the subtitle data items of the group;
• and
• a subtitle reproduction unit configured to reproduce the group included in the each of the segment data items while a partial content data part which is to be reproduced within the each of the time periods by the content reproduction unit is reproduced, the each of the segment data items being selected in reference to the subtitle reproduction control information item, and display the group on the subtitle display region in the display form based on the common subtitle data item.