Universal Disk Format (UDF) is an open, vendor-neutral file system for computer data storage for a broad range of media. In practice, it has been most widely used for DVDs and newer optical disc formats, supplanting ISO 9660.Due to its design, it is very well suited to incremental updates on both recordable and (re)writable optical media.UDF was developed and maintained by the …

Video storage format. While the primary application for UMD discs is as a storage medium for PSP games, the format is also used for the storage of motion pictures and, to a lesser degree, television shows for playback on the PSP. The video is encoded in the H.264/MPEG-4 AVC format, with the audio in ATRAC3plus or PCM.Video stored on UMD is typically encoded in 720×480 …