AES67 |
A technical standard for audio over IP and audio over Ethernet (AoE) interoperability developed by the AES. It is a layer 3 protocol suite facilitating interoperability between IP-based audio networking systems. Proprietary AoIP systems like WheatNet-IP, RAVENNA, Livewire, and Dante offer compatibility modes for interoperability using AES67 standards. |
API |
An Application Programming Interface (API) is a software intermediary allowing two applications to talk to each other. |
Dante |
Dante is a proprietary AoIP system developed by Audinate which also supports AES67 streaming. |
Destination |
An AoIP Destination is an endpoint for receiving an AES67 or ST 2110-30 stream. |
DSCP |
The Differentiated Services Code Point or Diffserv Value is a field in an IP packet header for prioritizing data when traversing IP networks. This is often used in AES67 streaming. |
Flow |
The term Dante uses to describe an audio stream over an AoIP network. E.g. Source flow. |
Follower |
Devices that are synced to an elected PTP Leader Clock over an AoIP network. |
GPIO |
A General Purpose Input/Output is a customizable pin on an integrated circuit that can be controlled by software. A GPI is a General Purpose Input and a GPO is a General Purpose Output. |
IGMP |
A communications protocol used by hosts and adjacent routers on IPv4 networks to establish multicast group mships to IPv4 routers. |
IGMP snooping |
The process of listening to IGMP network traffic for delivery of IP multicasts. Network switches with IGMP snooping maintain a map of which links need which IP multicast transmission. Multicasts may be filtered to conserve bandwidth on links. |
Livewire+ AES67 |
Livewire+ is a proprietary protocol from the Telos Alliance which is the second-generation of Livewire. It facilitates AES67 devices connecting directly to Livewire+ AES67 networks to exchange audio streams. |
Multicast |
Efficient one to many streaming of IP audio using multicast IP addressing. |
NMOS |
Networked Media Open Specifications (NMOS) delivering Discovery and Registration to ensure that parts of a networked media system can find each other. NMOS also provides connection management and audio channel mapping to device I/O channels. |
Primary Leader Clock |
The primary source of synchronization for clock distribution via PTP. |
PTP |
The general class clock distribution protocol standardized in IEEE 1588-2002, IEEE 1588-2008 and IEEE 802.1AS-2011. PTP syncing requires a leader clock source (often an installed PTP primary leader clocking device) with clocking replicated on synced devices. |
RAVENNA |
RAVENNA is an open technology developed by ALC NetworX for discovery and control. It is AES67 and SMPTE ST 2110 compliant. |
Redundant Streaming (SMPTE ST2022-7) |
Redundant AoIP streaming, also known as hitless merge or Seamless Protection Switching, is a redundancy mechanism whereby two streams of identical RTP packets are streamed over diverse paths. The objective is to seamlessly reconstruct a single perfectly reconstructed output stream based on the receipt of two potentially network impaired input streams. |
SAP |
SAP (Session Announcement Protocol) is a discovery protocol used by Dante to distribute SDP descriptions to receivers, enabling simplified connection management for multicast streaming. Settings are also available in other devices such as Livewire xNodes. |
Signal |
In WheatNet-IP a Signal is what defines a Source or Destination |
Source |
An AoIP Source in the codec is an AES67 stream sent by the codec to an AES67 LAN. |
Time To Live (TTL) |
TTL is the setting used in muliticast servers to ensure data packets have a finite life and don't cause congestion over networks. Each time a packet passes through a router it reduces by 1 until it reaches zero, at which point a router will no longer pass the packet. |
WheatNet-IP |
Proprietary IP protocol and networking system enabling AoIP audio streams to be intelligently distributed to devices across scalable networks. Compatibility mode also available for AES67 device interoperability. |
