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audio over Ethernet (AoE)

Ethernet is the most frequently used network concept. Among other things, it is used in corporate networking, but also in city networks, production technology and automotive technology. Even audio technology uses Ethernet for the transmission of audio files. This technology, called Audio over Ethernet, has found its way into professional audio technology, at manufacturers, system integrators, in audio broadcasting and in recording studios.

In terms of technology, Audio over Ethernet uses Ethernet for the transmission of digital audio. It thus relies on existing structures and cabling, and transports the audio data using specially developed transport protocols. There are various approaches to this from the Audio Engineering Society( AES) and EtherSound from Digigram.

All Audio-over-Ethernet methods involve multi- channel audio transmissions between any transmitting and receiving devices via a transmission medium, and in high-quality HiFi. For this reason, the transmissions require the highest possible bandwidths, such as those offered by Fast Ethernet and Gigabit Ethernet. However, it is also a question of quality features such as those for real-time Ethernet, which are expressed in the lowest possible latency, a defined quality of service( QoS) and no packet losses.

Ethernet uses a stochastic access method that does not allow for true real-time capability. However, for high-quality audio playback, delay and latency must be accurately predicted or quality will be compromised. Thus, in the case of latency, values below 6 milliseconds (ms) must be maintained. With Audio over Ethernet, 64 audio channels with a sampling rate of 48 kHz and an audio resolution of 24 bits should be transmitted simultaneously, or 32 channels with a sampling rate of 96 kHz. Other data rates must also be supported.

Informations:
Englisch: audio over Ethernet - AoE
Updated at: 13.02.2009
#Words: 267
Links: Ethernet, network, audio, transmission, system
Translations: DE
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