Audio over Ethernet

In audio and broadcast engineering, Audio over Ethernet (sometimes AoE—not to be confused with ATA over Ethernet) is the use of an Ethernet-based network to distribute real-time digital audio. AoE replaces bulky snake cables or audio-specific installed low-voltage wiring with standard network structured cabling in a facility. AoE provides a reliable backbone for any audio application, such as for large-scale sound reinforcement in stadiums, airports and convention centers, multiple studios or stages. While AoE bears a resemblance to voice over IP (VoIP) and audio over IP (AoIP), AoE is intended for high-fidelity, low-latency professional audio. Because of the fidelity and latency constraints, AoE systems generally do not utilize audio data compression. AoE systems use a much higher bit rate (typically 1 Mbit/s per channel) and much lower latency (typically less than 10 milliseconds) than VoIP. AoE requires a high-performance network. Performance requirements may be met through use of a dedicated local area network (LAN) or virtual LAN (VLAN), overprovisioning or quality of service features. Some AoE systems use proprietary protocols (at the lower OSI layers) which create Ethernet frames that are transmitted directly onto the Ethernet (layer 2) for efficiency and reduced overhead. The word clock may be provided by broadcast packets. There are several different and incompatible protocols for audio over Ethernet. Protocols can be broadly categorized into layer-1, layer-2 and layer-3 systems based on the layer in the OSI model where the protocol exists. Layer-1 protocols use Ethernet wiring and signaling components but do not use the Ethernet frame structure. Layer-1 protocols often use their own media access control (MAC) rather than the one native to Ethernet, which generally creates compatibility issues and thus requires a dedicated network for the protocol. AES50 (SuperMAC) by Klark Teknik, a point-to-point interconnect for bidirectional digital audio and sync clock MaGIC by Gibson HyperMAC, a gigabit Ethernet variant of SuperMAC A-Net by Aviom AudioRail ULTRANET By Behringer Layer-2 protocols encapsulate audio data in standard Ethernet packets.

About this result

This page is automatically generated and may contain information that is not correct, complete, up-to-date, or relevant to your search query. The same applies to every other page on this website. Please make sure to verify the information with EPFL's official sources.

Related concepts (8)

Related lectures (4)

Audio signal

An audio signal is a representation of sound, typically using either a changing level of electrical voltage for analog signals, or a series of binary numbers for digital signals. Audio signals have frequencies in the audio frequency range of roughly 20 to 20,000 Hz, which corresponds to the lower and upper limits of human hearing. Audio signals may be synthesized directly, or may originate at a transducer such as a microphone, musical instrument pickup, phonograph cartridge, or tape head.

Audio over IP

Audio over IP (AoIP) is the distribution of digital audio across an IP network such as the Internet. It is used increasingly to provide high-quality audio feeds over long distances. The application is also known as audio contribution over IP (ACIP) in reference to the programming contributions made by field reporters and remote events. Audio quality and latency are key issues for contribution links. In the past, these links have made use of ISDN services but these have become increasingly difficult or expensive to obtain.

Audio over Ethernet

Plasma Instabilities: Non-Linear Effects in Plasmas PHYS-736: Plasma instabilities

Explores non-linear effects in plasmas, focusing on weakly coupled plasmas, Maxwell's equations, collisional effects, and parametric instabilities.

Probability Theory: Midterm Solutions MATH-232: Probability and statistics

Covers the solutions to the midterm exam of a Probability Theory course, including calculations of probabilities and expectations.

Simplex Algorithm

Explains the Simplex Algorithm, covering basic directions, reduced costs, and finding solutions on vertices.