sessions with the network, associated with resources which are allocated and released using the U-N Resource protocol. MPEG transport profiles The specification provides profiles to the standard MPEG transport protocol (defined by ISO/IEC 13818-1) to allow transmission of event, synchronization, download, and other information in the MPEG transport stream. Download Several variations of this protocol allow transfer of content from server to client, either within the MPEG transport stream or on a separate (presumably high-speed) channel. Flow-controlled download allows the download operations to be negotiated and controlled by the client. A variation of download is an autonomous "data carousel" on the server which repeatedly downloads information; the download carousel client waits for the information without initiating the transfer. An extension to the data carousel is the "object carousel", which presents downloaded information as objects compatible with the objects defined by the User-User API. (The choice of download or IIOP protocols is embedded in the object's IOR, so the means of access is transparent to the client application.) Switched Digital Broadcast-Channel Change Protocol (SDB/CCP) Enables a client to remotely switch from channel to channel in a broadcast environment. Used to attach a client to a continuous-feed session (CFS) or other broadcast feed. Sometimes used in pay-per-view. An implementation does not always need all of these protocols. Almost all implementations in the real world use a subset. Extension Delivery Multimedia Integration Framework (DMIF) expands upon the MPEG-2 DSM-CC standard (ISO/IEC 13818-6:1998) to enable the convergence of interactive, broadcast and conversational multimedia into one specification which will be applicable to set tops, desktops and mobile stations. The DSM-CC work was extended as part of the ISO/IEC 14496-6 (MPEG-4 Part 6), with the DSM-CC Multimedia Integration Framework (DMIF). References External links ISO/IEC 13818-6:1998 - Information technology -- Generic coding of moving pictures and associated audio information - Part 6: Extensions for DSM-CC How To Become An Expert In DSM-CC - DSM-CC from the perspective of IDTV OpenCaster free GPL licensed software for transport stream broadcasting supporting DSM-CC Audio codecs Video codecs MPEG