DCI Specs - Digital Cinema Initiatives

5.2.2.3. InteroperableThe Packaging format is required to have an open framework that accommodatescompressed, encrypted files as well as all other files used in Digital Cinema.5.2.2.4. ScalableThe Packaging format is required to accommodate any number of essence or metadatacomponents. There is no limit on the number of files included in the package or the sizeof the files.5.2.2.5. Supports Essential Business FunctionsThe Packaging format is required to support content structure as needed during booking,fulfillment, show preparation, booking updates, secure licensed playback and logging.5.2.2.6. SecureThe Packaging format is required to support integrity and security at two levels: (1) abasic level which can provide reasonable assurance of file integrity without reference tolicenses or a Security Manager (SM), and (2) an engagement-specific level representinga particular business-to-business relationship.5.2.2.7. ExtensibleThe Packaging format is required to allow for new Digital Cinema features(compositions) to be contained within the package.5.2.2.8. SynchronizationThe Packaging format is required to provide support for synchronization of the essenceand metadata elements.5.2.2.9. Human Readable MetadataHuman readable metadata is required to be in English (default) but can be provided inother languages as well.5.2.2.10. IdentityThe packaging format is required to support unique and durable identification of assetsand metadata using embedded unique identifiers. Throughout this document, theacronym “UUID“ shall mean a type 4 (pseudo-random) Universally Unique Identifier(UUID) as defined in IETF RFC 4122.5.2.3. Packaging ConceptsIt is common practice to divide a feature film into reels of between 10 and 20 minutes inlength for post-production, and distribution. These reels are then assembled, together withother content, to create the modern platters that are used in exhibition today. This conceptof reels is required to be supported with Digital Cinema content.The Digital Cinema Packaging System is built on a hierarchal structure. The most basicelement of the packaging system begins with track files. These are the smallest elements ofa package that can be managed or replaced as a distinct asset. A track file can containessence and/or metadata. Its duration is set to be convenient to the processes and systemsDCI Digital Cinema System Specification v.1.2 Page 44