DCI Specs - Digital Cinema Initiatives

When used in theatrical environments, it is required that the Dual Link HD-SDI beencrypted. The encryption specification is required to be an open international standard.The encryption is required to use AES with a 128 bit key. (See Section 9.4.4 LinkEncryption)8.4.3.4. 10 Gigabit FiberFor mastering environments, 10 Gigabit fiber, also known as [IEEE 802.3ae], may beadapted for a point-to-point interface. The goal for this interface would be to use thesame physical layer and adopt a protocol for streaming image data. Listed below aresome of the requirements:• Dual SC Fiber Connector (back haul status/handshake)• Multi Mode• Point-to-point• Matrix Switch and/or Patchable• Up to 100 meter runs• Physical Interface established (Layer 1)• Electrical Interface established (Layer 1)• 10 Gbit/sec link bandwidth to accommodate up to DCDM in real-time8.4.4. Graphics and Timed Text InterfaceTimed Text and subpicture interfaces are required to use a 100Base-T Ethernet [IEEE802.3] interface. This may be the same interface that is used for control and status.8.4.5. Control and Status InterfaceThese signals allow the SMS, TMS, the projector and the theater automation system tocommunicate. The physical implementation is required to be 100Base-T Ethernet [IEEE802.3]. The protocol used is required to be the same as the Theater Management Network.(See Section 7 THEATER SYSTEMS)8.4.5.1. ControlThe following is an example list of control messages that can be sent to the projector:• Local / Remote• Power On / Off• Douser On / Off• Input Select• Test Signal On / Off• Test Signal Selection• User Memory Recall 1 to n• Zoom In / Out• Focus + / -DCI Digital Cinema System Specification v.1.2 Page 89