DCI Specs - Digital Cinema Initiatives

facility, while the system is in operation. As an example, this would include simultaneouscontent load-in and playback. This movement could consist of many different examplesof operation such as:• Downloading content while playback of presentations are in progress• Movement of content from a central storage to local storage while othercontent is in playback• Deleting content while other content is in playbackI. The SMS or TMS is required to warn and not allow deletion if the content isin use or part of a current Show Playlist.II.The SMS or TMS is required to provide a deletion process that removes allof the content, key information, and playlists associated with thecomposition.7.4.1.6. Assembly of ContentAn electronic method is required to assemble trailers, feature presentations and othercontent in the creation of shows. At a minimum, a standard method is required toelectronically identify the content to the SMS, TMS and the Security Manager (SM) toallow the show to be assembled and played back. This method of identification isembedded within the packaging format as metadata. (See Section: 5 PACKAGING)Operationally, the SMS and TMS are required to provide the user with a method ofcreating a Show Playlist. This method provides for the following:• A method of building shows is required to allow only authorized personal tobuild, save and transport the Show Playlist.• A method is required to use the validity/expiry method, so that one can checkthat one has the security devices and keying parameters required forplayback.• A method is required to make it possible for a Show Playlist to be providedvia an external source.• A method is required to provide a means for inserting a black screen andsilence between content. The Media Block is required to be able to transitionmodes without displaying a roll or similar artifacts during a transition betweenclips in a playlist or between playlists.• Show Playlists can consist of both encrypted and non-encrypted content.• The Show Playlist can be communicated in whole to the Media Block,whereupon it is then stored and subsequently executed within the MediaBlock (Content Data Pull Model).• The Show Playlist can be executed within the SMS and communicated to theStorage and Media Block one command at a time (Content Data PushModel).• A method is required to provide for the insertion of cues. These cues allowthe automation system to perform its tasks at event boundaries, such as startof feature and start of end credits.DCI Digital Cinema System Specification v.1.2 Page 64