Patent ID: 8090682

Claim:
A composite content file editing method for editing a composite content file in which a plurality of types of media data are multiplexed, the composite content file having a header portion in which reproduction conditions including time information indicating reproduction time lengths for each type of the media data are stored and also a media data portion provided separately from the header portion and storing therein the media data, the method comprising: dividing each media data included in the composite content file on the time base so as to generate a first composite content file to be reproduced first on the time base and a second composite content file to be reproduced later, each of said composite content files comprising a group of media data; adding to the first composite content file, as synchronizing information, information about a position shift on the time base at reproduction start and reproduction end of video data that is one type of said group of media data included in the first composite content file, and file information of the second composite content file; and adding to the second composite content file, as synchronizing information, information about a position shift on the time base at reproduction start and reproduction end of video data that is one type of said group of media data included in the second composite content file.