Apparatus and method for providing high speed download service of multimedia contents

Abstract

An apparatus for downloading a multimedia file including a file converter configured to convert a larger multimedia file into a smaller multimedia file by deleting prescribed medial information based on a media format contained in the larger file. Further, the file converter converts the larger file into the smaller file by deleting multi bit-rate media not corresponding to a selected bit rate or by deleting enhancement layer video.

1 . An apparatus for downloading a multimedia file, comprising: 
 a file converter configured to convert a larger multimedia file into a smaller multimedia file by deleting prescribed media information based on a media format contained in the larger file.    
   
   
       2 . The apparatus of  claim 1 , wherein the file converter converts the larger file into the smaller file by deleting multi bit-rate media not corresponding to a selected bit rate or by deleting enhancement layer video.  
   
   
       3 . The apparatus of  claim 1 , wherein a format of the media comprises: 
 a format containing multi bit-rate media; and    a format containing enhancement layer video.    
   
   
       4 . The apparatus of  claim 1 , wherein if there is multi bit-rate media in the larger file, the file converter deletes tracks of a ‘moov’ part and media data of a ‘mdat’ part except for a selected bit rate and adjusts a value of a track header box in the ‘moov’ part.  
   
   
       5 . The apparatus of  claim 4 , wherein adjustment of the track header box value is performed so an alternate_group value indicating alikeness of media data content is set to ‘0’, a chunk_offset value indicating a spatial-position of non-deleted media data is adjusted, and a hint track is deleted.  
   
   
       6 . The apparatus of  claim 1 , wherein if there is an enhancement layer video in the larger file, the file converter deletes tracks of a ‘moov’ part and media data of a ‘mdat’ part related to the enhancement layer video and adjusts a value of the track header box of ‘moov’ part.  
   
   
       7 . The apparatus of  claim 6 , wherein adjustment of the track header box value is performed so a chunk_offset value indicating a spatial position of non-deleted media data is adjusted, and a hint track is deleted.  
   
   
       8 . A method for downloading a multimedia file, comprising: 
 converting a larger multimedia file into a smaller multimedia file by deleting prescribed media information based on a media format contained in the larger multimedia file.    
   
   
       9 . The method of  claim 8 , wherein converting the larger file into the smaller file is performed by deleting multi bit-rate media not corresponding to a selected bit rate or by deleting enhancement layer video.  
   
   
       10 . The method of  claim 8 , further comprising: 
 receiving a download service request for the larger multimedia file; and    transmitting the smaller file to a terminal after converting the larger file into the smaller file.    
   
   
       11 . The method of  claim 7 , wherein converting the larger file into a smaller file comprises: 
 checking a media format in the larger multimedia file;    deleting the prescribed media information; and    adjusting a track header box value for the deleted media information.    
   
   
       12 . The method of  claim 11 , wherein checking the media format comprises: 
 determining whether a multi bit-rate media is contained therein; and    determining whether an enhancement layer video is contained therein.    
   
   
       13 . The method of  claim 8 , wherein converting the larger file into the smaller file, comprises: 
 deleting tracks of ‘moov’ part and media data of an ‘mdat’ part except for a bit rate selected by a user; and    deleting tracks of a ‘moov’ part and media data of an ‘mdat’ part related to enhancement layer video.    
   
   
       14 . The method of  claim 11 , wherein adjusting the track header box value comprises: 
 adjusting a chunk_offset value indicating a spatial position of non-deleted media data.    
   
   
       15 . The method of  claim 11 , wherein adjusting the track header box value comprises: 
 setting an alternate_group value indicating alikeness of the media data to ‘0’.    
   
   
       16 . The method of  claim 8 , wherein converting the larger file into the smaller file comprises: 
 deleting a hint track indicating a streaming service.