ANSI ESTA E1.31 pdf free download
ANSI ESTA E1.31 pdf free download.Entertainment Technology Lightweight streaming protocol for transport of DMX512 using ACN.
3.6 Receiver: A receiver is the intended target of information from a source. A receiver may listen on multiple universes.
3.7 Active Data Slots: When translating ANSI El .11 DMX512-A [DMX] to El .31, the active data slots are defined as ranging from data slot 1 to the maximum data slot in the most recently received packet with the corresponding START Code. Devices originating El .31 shall define their active data slots using the DMP First Property Address and DMP Property Count fields shown in Table 1.
3.8 El .31 Data Packet: There are several types of El .31 packets, differentiated by the vectors in their Framing Layer. An El .31 Data Packet is a packet which carries a DMX51 2-A [DMX] payload. It is transmitted with the VECTOR_El 31_DATA_PACKET vector.
3.9 El .31 Synchronization Packet: There are several types of El .31 packets, differentiated by the vectors in their Framing Layer. An El .31 Synchronization Packet is a packet which contains only universe synchronization information and no additional data. It is transmitted with the
VECTOR_El 31_EXTENDED_SYNCHRONIZATION vector.
3.10 El.31 Universe Discovery: There are several types of E1.31 packets, differentiated by the vectors in their Framing Layer. An El .31 Universe Discovery Packet is a packet which contains a packed list of the universes upon which a source is actively operating. It is transmitted with the VECTOR_E131_EXTENDED_DISCO VERY vector.
4 Protocol Packet Structure Summary
El .31 is a protocol that lives within the suite of protocols defined by the ANSI El .17 [ACN] standard. The ACN standard provides a method for layering protocols and for using a simple repeating message structure throughout. The lowest layer ACN protocol is called the Root Layer Protocol (RLP), which wraps El .31 as well as other protocols such as Session Data Transport (SDT). It is not necessary to implement or understand these other protocols to use El .31 to send DMX512-A [DMX] data over ACN.
The repeating message structure is called the Protocol Data
Unit (PDU) format which is fully defined in “Section 2.2 Protocol
Data Units and Blocks The Standard ACN Message Format”
and “Section 2.4 PDU Fields” of the “ACN Architecture
Document” of ANSI El.17 [ACN].
El .31 defines several distinct packets. El .31 components must support the El .31 Data Packet for transportation of DMX51 2-A data, as well as the El .31 Universe Discovery Packet for tracking of El .31 traffic. El .31 components may support the El .31 Synchronization Packet. A more complete discussion of Universe Synchronization follows in section 11. Universe Discovery can be found in section 12.
4.1 El .31 Data Packet
The El .31 Data Packet defines an outer layer PDU wrapper that specifies the sequence number of a packet and that carries a block of data. This data block contains a nested PDU containing a single message of the Device Management Protocol of ANSI El .17 [ACN] to carry DMX51 2-A [DMX] data. Each PDU contains a length field which equals the length of the entire PDU, including its header and data block information.
ANSI ESTA E1.31 pdf download.
