In Broadcast - September 2021 - 24

24
www.inbroadcast.com | Vol: 11 - Issue 9 | September 2021
InFile
Gateway Delivers AES67,
ST2110 and More
AoIP Protocol Compliance
Delivers Flexible
Codec Streaming
With AoIP infrastructure pervasive
within newer studios, uncompressed
audio is now the norm. After refining
and perfecting IP streaming strategies
in challenging remote broadcast
environments over many years,
Tieline is leading from the front to
integrate uncompressed studio AoIP
streams with inbound compressed
and uncompressed remote
IP streams within today's
broadcast plant.
Tieline codecs are often 'edge'
devices in IP networks bridging
between distant wide area network
(WAN) nodes that may include the
broadcast plant, other studios (interstudio
links), production facilities
and live events. Broadcast engineers
seek AoIP devices that can transcend
multiple technological standards and
traverse across LANs, WANs and the
public internet, a gateway of sorts with
simple monitoring and control. Why
is this so important? Interoperability
delivers greater flexibility when
integrating IP audio streams into
the broadcast plant from a range of
sources.
AES67 and ST 2110 at the Studio
Gateway and Gateway 4 codecs are
compliant with AES67 and SMPTE ST
2110-30 for audio transport. These
standards provide the framework for
transporting uncompressed PCM audio
around the broadcast plant. The AES67
and ST 2110-30 standards support
Session Description Protocol (SDP)
for configuring the number of audio
channels per stream, encoding format,
bits per sample, sampling frequency
and number of samples in a packet.
Tieline codecs stream AES67 and
ST 2110-30 compliant digital
audio between equipment from
manufacturers supporting
these standards. They also
support installation of an
optional WheatNet-IP card. This
provides a flexible platform for
routing audio between a range
of equipment using proprietary
AoIP protocols like WheatNetIP,
as well as devices supporting
RAVENNA, AES67 and ST 2110-30.
The Gateway AoIP codec supports connecting
with a variety of AoIP protocols
Even if studios install equipment
using proprietary AoIP protocols such
as WheatNet-IP, Livewire+ or Dante,
in the real-world broadcast engineers
often need the ability to connect and
stream between equipment from
different vendors. This is where AES67,
RAVENNA, and ST 2110-30 for those in
the TV world, provide a high degree
of interoperability
with proprietary
protocols such as Dante and Livewire+
(in AES67 compatibility mode).
IP Stream Discovery
and Advertisement
AES67 and ST 2110-30 only address
stream transport, packet setup and
synchronization (timing). Nothing is
mandated regarding discovery.
Tieline offers optional WheatNetIP
cards at purchase to interface
directly with a WheatNet-IP network.
Codecs then appear as Blades and
seamlessly support stream discovery,
advertisement and control using
Wheatstone's Navigator software.
There are also other options for
stream discovery and advertisement.
Available RAVENNA devices displayed
in a Tieline codec GUI
and service providers to build
better systems with streamlined
management and control options.
Many broadcast
networks
around
the world use RAVENNA for stream
discovery and advertisement. The
recent integration of RAVENNA allows
Tieline codecs to perform these tasks
over RAVENNA AoIP networks.
" Ever since the days of POTS and
ISDN, Tieline has always advocated
for interoperability of equipment
from different manufacturers, " said
Charlie Gawley, Tieline's VP Sales
APAC/EMEA. " The world of IP is
no different. It's why our Gateway
platform is AES67, ST 211030,
NMOS and RAVENNA
compliant, allowing devices
from different vendors to
connect seamlessly. "
The Gateway and Gateway
4 also support Ember+
which is an openly available
control protocol allowing
equipment to interact more
easily. Ember+ control
Gateway codec added in Navigator
software can easily manage devices
Interoperability with NMOS,
RAVENNA and Ember+
Gateway and Gateway 4 codecs
are compliant with AMWA NMOS
standards IS-04 and IS-05 which
delivers discovery, registration, and
ultimately control for ST 2110 AoIP
streaming. NMOS data models and
open standard APIs deliver a new
level of interoperability and control
with networked equipment throughout
the stations and networks.
NMOS will deliver more
functions and greater
interoperability
between
IP
devices from different vendors
over time. More straightforward
interoperability between products
is important as it allows end users
from
different
Gateway 16 channel AoIP codec
manufacturers
by
integrating them into a single user
interface.
More NMOS and Ember+ features
and capabilities will be developed in
Tieline codecs and integrated over
time via firmware updates.
SIP and Phase-Aligned
Streaming
All
Tieline
codecs
supports
SIP
interoperability standards for IP audio
codecs. EBU3326 (Audio Contribution
over IP) and EBU3347 (Intercom over
IP). These important protocols allow
Tieline codecs to connect with nonTieline
devices. Plus, a Gateway codec
can act as a SIP trunk-based gateway
for public internet communication
circuits between multiple
venues at large sporting
events,
or
between
locations over WANs.
Demand for multichannel
and surround sound
streaming options is also
increasing and up to 8
channels of digital phasealigned
multichannel
audio are supported in Gateway to
provide a range of flexible alternatives.
Selectable options include 6 channel
(5.1 or 6.0), 8 channel (7.1 or 8.0), and
4 channel phase-aligned streams.
Charlie Gawley, Tieline VP Sales
APAC/EMEA, advocates for device
interoperability and flexibility
" With the multitude of use cases,
IP protocols, and vendors supplying
equipment throughout the broadcast
chain, our customers are telling us
they want to do more with less, " said
Gawley. " In other words, fewer boxes,
using less space, with lower power
consumption and more functionality.
Flexibility and interoperability will be
paramount going forward. "
www.tieline.com
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