DEVICE FOR CONVERTING INPUT DATA INTO MPEG-21 FILE FORMAT AND METHOD THEREFOR, CONCERNED WITH SATISFYING THE REQUIREMENTS OF RANDOM ACCESS/MPEG SYSTEM WITHIN FILE

摘要

PURPOSE: A device for converting input data into an MPEG-21 file format is provided to systematically configure a DID(Digital Item Declaration) and related other DID and a media resource in an MPEG-21 file format, thereby satisfying the requirements of a random access/MPEG system within a file. CONSTITUTION: Data inputted outside is converted into an MPEG-21 file format. The MPEG-21 file format includes as follows. A file header is included. A DI(Digital Item) box includes a DID. A media resource is included. A resource box includes URL information or other DI which refers to the media resource. A resource track includes referred XML-type DIDs existing in recursive way within one box. A security box protects a file while supporting integrity.