About Avb - MOTU 1248 User Manual

Networking
CHAPTER 10
OVERVIEW
The Audio Video Bridging (AVB) network port on
your MOTU interface opens up a world of
possibilities for creating expanded, customized
audio network systems.
About AVB . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 105
MOTU's AVB implementation . . . . . . . . . . . . . . . . . . . . . . . 106
Networking examples . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 106
A quick guide to networking . . . . . . . . . . . . . . . . . . . . . . . 108
Setting up a MOTU AVB interface for networking. . . 109
Mapping audio to network streams . . . . . . . . . . . . . . . . 109
Mapping computer channels to network streams . . 109
Device presets and AVB stream connections. . . . . . . . 110
Bridging to Ethernet . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110
The MOTU AVB Switch . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 110

ABOUT AVB

Audio Video Bridging (AVB) is an extension of the
Ethernet standard developed by the IEEE (802.1
standards committee) specifically to add high-
performance audio and video networking.
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You may also hear AVB referred to as
AVB/TSN or simply TSN because the IEEE is in the
process of renaming the standard to Time Sensitive
Networking to accommodate the expanding scope
of the specification to applications beyond audio
and video.
AVB brings together the worlds of networking
technology and high-end audio. Here is a brief
summary of some of the immediate benefits of
AVB for you, as a MOTU AVB interface user:
An open industry standard - AVB has been
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developed by the IEEE as an international standard
specification. It is not proprietary or controlled by
one company.
High channel counts - AVB provides hundreds
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of network channels.
Extremely low latency - AVB guarantees low-
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latency, real-time performance.
Guaranteed Quality of Service (QoS) - AVB's
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Stream Reservation Protocol provides Guaranteed
Quality of Service for each and every audio stream.
If the network cannot continuously maintain every
bit of every sample in the audio stream, it will not
allow you to make the network connection in the
first place. AVB streams are prioritized over other
network traffic to ensure high performance.
Network-wide clocking and sync - AVB
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devices all clock together over your network for
better-than-sample-accurate phase lock across all
connected devices. Timing accuracy is down to the
nanosecond.
True plug-and-play operation - AVB has been
■
designed from the ground up to provide automatic
device discovery, enumeration, and connection
management. Just plug your MOTU AVB interfaces
into a standard AVB switch and go. If you wish to
make stream connections and have the ability to
select media clock, you must use the web app, or
some other AVB controller. You don't need an IT
professional to configure the network. AVB is a
self-managing network protocol.
Bridging to standard Ethernet - AVB
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cooperates with standard Ethernet networks, for
connecting traditional Ethernet devices like
wireless routers, switches, or any other non-AVB-
aware device.
Support for existing network infrastructure -
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Replace your existing switches with standard AVB-
compatible switches, and your CAT-5e or CAT-6
wired infrastructure now supports AVB.
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