Patent ID: 8176424

Claim:
A decoding method comprising: receiving multimedia data which comprises a file type area including information regarding a format of a file, a media area including a video data area and an audio data area, a media information area including a video track area and an audio track area respectively corresponding to the video data area and the audio data area, and a menu description area including description data for displaying a menu that provides an interface between a user and media data in the media area; extracting the description data from the multimedia data; rendering a menu using the extracted description data; and decoding media data extracted from the media area based on the menu, wherein the media area, the media information area and the menu description area are incorporated into one file, the multimedia data further comprises usage metadata in another file, the usage metadata describes and stores a user's action on the media data in the media area, and the decoding comprises decoding the media data from a point of interruption of the media data using the usage metadata, and wherein the description data is created using LASeR (Light-weight Application Scene Representation).