ANSI E1.31-2009 pdf download Entertainment Technology Lightweight streaming protocol for transport of DMX51 2 using ACN
1.1 Scope This standard describes a mechanism to transfer DMX51 2-A [DMX] packets over a TCP/IP network using a subset of the ACN protocol suite. It covers data format, data protocol, data addressing, and network management. It also outlines a synchronization method to help ensure that multiple receivers can process this data concurrently when supervised by the same source. Sources transporting either data or synchronization packets must also advertise, via the Universe Discovery mechanism, what universes they are actively transmitting on.
1.2 Overview and Architecture This standard can be used to transfer DMX51 2-A [DMX] packets of all START Codes via an ANSI E1 .1 7 [ACN] supported network. It also defines a method by which this [DMX] data may be synchronized across multiple receivers. A simple packet wrapper approach is used whereby the data is encapsulated in a wrapper following the ACN packet structure. The ACN standard wrapper is carried in UDP [UDP] packets when used on TCP/IP networks. In the future, this use of the ACN wrapper and packet structure will also allow E1 .31 to be carried over other networks supported by ACN. The wrapper is structured such that it is both compatible and meaningful to the ANSI E1 .1 7 [ACN] standard. Readers are referred to the ANSI E1 .1 7 [ACN] standard, particularly the “ACN Architecture” and “Device Management Protocol” documents for more information. The “Root Layer Protocol” used in this standard is described in the “ACN Architecture” document. This standard uses multicast addressing to provide a mechanism to partition traffic for distinct universes of DMX51 2-A [DMX] and synchronization data. Direct unicast of DMX51 2-A [DMX] data is also supported.
1.3 Appropriate Use of This Standard This standard uses a non-reliable IP transport mechanism to stream packets of data from multiple sources to multiple receivers over the ACN network. There is no acknowledgement and therefore no assurance that all packets have been received.