![]() The Picture Track File essence is compressed using JPEG 2000 and the Audio Track File carries a 24-bit linear PCM uncompressed multichannel WAV file. However, as already noted, it is commonplace in the industry to discuss the title in terms of a DCP, as that is the deliverable to the cinema. A composition is a complete representation of a title version, while the DCP need not carry a full composition. The composition, consisting of a Composition Playlist and associated track files, are distributed as a Digital Cinema Package (DCP). Two track files at a minimum must be present in every composition (see SMPTE ST429-2 D-Cinema Packaging – DCP Constraints, or Cinepedia ): a track file carrying picture essence, and a track file carrying audio essence. Track Files carry the essence, which is wrapped using Material eXchange Format (MXF). ![]() The composition consists of a Composition Playlist (in XML format) that defines the playback sequence of a set of Track Files. not a complete set of files), a single complete composition, or multiple and complete compositions. The DCP may carry a partial composition (e.g. ) A DCP is a “packing crate” for compositions, a hierarchical file structure that represents a title version. ("You PLAY a composition, you do NOT play a Digital Cinema Package". However, the industry tends to apply the term to the structure more formally known as the composition. ![]() ![]() The term was popularized by Digital Cinema Initiatives, LLC in its original recommendation for packaging DC contents. A Digital Cinema Package ( DCP) is a collection of digital files used to store and convey digital cinema (DC) audio, image, and data streams. ![]()
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