Recording medium having data structure for managing reproduction of text subtitle and recording and reproducing methods and apparatuses

Abstract

In the data structure for managing reproduction of text subtitle data, a recording area stores a main file and at least one separate text file. The main file includes multiplexed audio and video data streams, and the text subtitle file includes a single text subtitle stream.

1 . A method of reproducing data recorded on a recording medium, the method comprising:
 receiving at least one text subtitle stream from an external source,   reproducing at least one subtitle stream including the at least one text subtitle stream and at least one bitmap subtitle stream recorded on the recording medium,   wherein either one of the text subtitle stream and the bitmap subtitle stream is reproduced.   
     
     
         2 . The method of  claim 1 , wherein the external source includes contents provided through networks, and the text subtitle stream is received in a format of MPEG2 transport stream. 
     
     
         3 . The method of  claim 1 , further comprising:
 reproducing at least one video data stream, wherein the bitmap subtitle stream is multiplexed with the video data stream in a main file.   
     
     
         4 . The method of  claim 3 , wherein the bitmap subtitle stream and the text subtitle stream include transport packets having a unique packet identifier distinguishable from a packet identifier of the video data stream. 
     
     
         5 . The method of  claim 1 , wherein the bitmap subtitle stream being included in a bitmap subtitle file, the text subtitle stream being included in a text subtitle file, the bitmap subtitle file being separated from the text subtitle file. 
     
     
         6 . The method of  claim 1 , wherein the at least one text subtitle stream is included in a plurality of text subtitle files, and each text subtitle file including a single text subtitle stream, one of the plurality of text subtitle files storing the single text subtitle stream for one language, and another one of the plurality of text subtitle files storing the single text subtitle stream for a different language. 
     
     
         7 . An apparatus for reproducing data recorded on a recording medium, the apparatus comprising:
 a pickup configured to read at least one bitmap subtitle stream recorded on a recording medium,   a memory configured to store at least one text subtitle stream received from an external source,   a first decoder configured to decode the bitmap subtitle stream, a second decoder configured to decode the text subtitle stream,   wherein either one of the text subtitle stream and the bitmap subtitle stream is reproduced.   
     
     
         8 . The apparatus of  claim 7 , wherein the external source includes contents provided through networks, and the text subtitle stream is received in a format of MPEG2 transport stream. 
     
     
         9 . The apparatus of  claim 7 , further comprising:
 a video decoder to decode at least one video data stream, wherein the bitmap subtitle stream is multiplexed with the video data stream in a main file.   
     
     
         10 . The apparatus of  claim 9 , wherein the bitmap subtitle stream and the text subtitle stream include transport packets having a unique packet identifier distinguishable from a packet identifier of the video data stream. 
     
     
         11 . The apparatus of  claim 7 , wherein the bitmap subtitle stream being included in a bitmap subtitle file, the text subtitle stream being included in a text subtitle file, the bitmap subtitle file being separate from the text subtitle file. 
     
     
         12 . The apparatus of  claim 7 , wherein the at least one text subtitle stream is included in a plurality of text subtitle files, and each text subtitle file including a single text subtitle stream, one of the plurality of text subtitle files storing the single text subtitle stream for one language, and another one of the plurality of text subtitle files storing the single text subtitle stream for a different language. 
     
     
         13 . The apparatus of  claim 7 , further comprising:
 a selector configured to reproduce either one of the text subtitle stream and the bitmap subtitle stream.