InBroadcast - April 2022 - 60

60
www.inbroadcast.com | Vol: 12 - Issue 4 | April 2022
InFile
AoIP Interoperability is Broadcast's Holy Grail
A
The importance of AoIP interoperability throughout broadcast networks cannot be
underestimated. It is indispensable when integrating equipment from different vendors...
lthough IP infrastructure
has become ubiquitous
in the studio environment,
particularly
over the last
decade, it has been employed
more widely for two decades in
outside broadcast solutions.
The shift
the broadcast
plant
In addition, a Dante card
option is planned in coming
months.
Why
is
interoperability
to IP throughout
has
developed alongside remote
broadcast IP solutions and
both now complement
each other to deliver
integrated digital solutions.
Interoperability
is
essential
to seamlessly manage and
route audio streams between
different AoIP systems and
products. IP codecs help to
facilitate seamless transport
of
outside broadcast
and
studio-based IP audio streams
across LANs and WANs.
Outside Broadcast Solutions
Audio codec
like
Tieline have integrated
manufacturers
IP
technologies in outside broadcast
codecs since 2004 using wired and
cellular technologies
like 2G, 3G,
4G LTE and now 5G networks. True
outside broadcast flexibility requires
the ability to successfully broadcast
over imperfect wide area IP networks
like the public internet using a range
of IP technologies.
As a result,
wireless
solutions
Tieline's wired and
have always
been engineered to perform over
all IP networks - managed
and
unmanaged. This requires IP packet
management strategies like auto jitter
management, redundant streaming,
and
data aggregation solutions.
Sure, some remote sites may have
access to a leased fibre-optic link,
however this is still fairly uncommon
except
at major events. From an
interoperability perspective, Tieline
has always ensured IP interoperability
between its codecs and different IP
codec vendors, which is essential
given not all broadcasters use the
same hardware. All Tieline IP codecs
are compliant with EBU specifications
for IP interoperability using SIP (EBU
N/ACIP Tech 3326/3347). Elements
of which, like Session Description
Protocol (SDP), are part of the AES67
standard,
so
prevalent
infrastructure today.
in
studio
AoIP in the Broadcast Plant
AoIP infrastructure within the
different
broadcast
plant
is
outside broadcasts
and
operates over a managed AES67/ST
2110-30 compliant multicast network,
whereas
often
connect over lossy and less reliable
cellular networks and the like.
AoIP in the studio has been a slower
burn and taken a little longer to
become established. Often this has
been because analogue infrastructure
was reliable and working well, and
established engineers generally were
not IT guys, so there was a need to
ramp up AoIP technical expertise.
Increasingly, new studio consoles
were all digital and the benefits of
AoIP became too numerous to ignore:
faster studio upgrades, higher quality
audio, greater flexibility, a lot less
wiring, and of course AES67 providing
interoperability.
Livewire (Telos), Dante (Audinate),
WheatNet-IP (Wheatstone)
and
networking protocols appeared in
the early
(ALC
NetworkX) was
at IBC in 2010. Since then, these
competing protocols have become
pervasive throughout
the audio
world and dominate broadcast studio
infrastructure.
The Role of AES67 and ST 2110
The AES67 technical
standard
for AoIP and Audio over Ethernet
provides a Layer 3 protocol framework
allowing interoperability
between
to mid-2000s. RAVENNA
introduced
the various proprietary IP networking
systems, e.g. WheatNet-IP, Livewire+,
RAVENNA and
proprietary
protocols
AES67.
ST 2110 is
Dante.
all
a SMPTE
These
support
suite of
standards for broadcast production
and distribution enabling transport
of
IP
is
important
interoperability
in
the
TV world.
ST 2110-30 is the part describing
the transport of linear PCM audio
based on AES67 and ST 2022-7
defines requirements for redundant
streaming and seamless protection
switching.
PTP operating profiles
synchronisation.
Control and Alignment with
Engineering Objectives
Gateway and Gateway 4 codecs
ST 2059-2 defines
for media
Codecs Bridge the Studio Divide
Audio codecs today fulfil a unique
role. They are often 'edge' devices
that bridge between the broadcast
plant, other studios
links), production facilities
live events. They must support
(inter-studio
and
IP
streams traversing lossy WANs like
the internet, yet also integrate with
managed AoIP networks at the studio
that are AES67, ST 2110-30 and ST
2022-7 compliant.
For example, Tieline's Gateway and
Gateway 4 codecs speak the language
of AES67, ST2110-30, ST 2022-7,
RAVENNA, Livewire+, NMOS IS-04
and IS-05, Ember+, and options like
WheatNet-IP. Livewire+ and RAVENNA
are natively supported.
are compliant with the AMWA NMOS
standards IS-04 and IS-05, which
deliver discovery, registration, and
ultimately control
streaming. NMOS
for ST 2110 AoIP
data models
and open standard APIs deliver a
new level
of
networks.
the stations
The Gateway
suite
interoperability and
control with networked equipment
throughout
codecs also supports the Ember+
open control protocol. Ember+ control
software can easily manage devices
from different vendors by integrating
them into a single user interface.
In summary, more straightforward
interoperability
service providers
and
of
video, audio, and data over
networks. It
address
Figure 1: Studio Infrastructure
Supporting Multiple AoIP
Protocols
important? In the realworld,
broadcast engineers
often need to connect and
stream between equipment
from different
vendors
using different
proprietary
protocols. Interoperability
with multiple AoIP protocols
delivers
greater flexibility
when integrating IP audio
streams into the broadcast
plant
sources.
Simplifying Stream
Discovery and
Advertisement
AES67 and ST 2110-30 only
stream transport, packet
setup and synchronization (timing).
Nothing is mandated
regarding
for
discovery and control.
Tieline codecs support WheatNet-IP
(optional), RAVENNA, and Livewire+,
which offer stream discovery and
advertisement, making it simpler to
manage and control AoIP streams
using these protocols.
from a range of
between products
is important as it allows end users
and
to build
better systems with streamlined
management and control options.
Tieline will exhibit at NAB 2022,
booth #C1707.
https://tieline.com
http://www.inbroadcast.com https://tieline.com https://tieline.com/gateway/ https://www.tieline.com

InBroadcast - April 2022

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Contents
InBroadcast - April 2022 - Intro
InBroadcast - April 2022 - Cover1
InBroadcast - April 2022 - Cover2
InBroadcast - April 2022 - Contents
InBroadcast - April 2022 - 4
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InBroadcast - April 2022 - Cover3
InBroadcast - April 2022 - Cover4
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