InBroadcast - April 2022 - 62

62
www.inbroadcast.com | Vol: 12 - Issue 4 | April 2022
InFile
WorldCast launches powerful new versions
of APTmpX for radio broadcast, enabling
the highest audio transparency with low
bandwidth for MPX over IP
W
orldCast Systems, the supplier
of
advanced
broadcast
products, is pleased to announce
the further evolution of its powerful
APTmpX solution. APTmpX is FM's
most
superior and versatile MPX
compression algorithm to save
network bandwidth for STLs - while
ensuring high audio transparency
and link quality.
The transmission of a finally
assembled MPX signal significantly
lowers the hardware and distribution
costs
previously
associated with
standard FM network architecture.
However, the high network
bandwidth required by the composed
linear MPX signal on the transmission
path is a negative attribute, opposed
to the positive cost analysis of an
MPX transmission.
Despite the advent of the internet
and digital broadcasting standards,
FM remains the world's most popular
transmission format and a central
technology in radio broadcasters'
efforts
to maximize their reach
and audience. As a result, new
technologies have had to be created
to enable an FM-centric workflow to
also work for internet delivery.
The
first
high-quality
version of
signal
APTmpX,
launched in October 2020, provided
FM broadcasters with access
to
compression
for the resulting centralized FM
MPX/composite transmission.
The breakthrough solution,
in the
<900Kbps range, solved the difficulty
of ensuring high quality and lowcost
transmission.
However, the
latest version of APTmpX goes one
step further. After optimization by
WorldCast
engineers, three new
versions are available, offering new
compression levels at 600, 400, or
300 Kbps network bandwidth. In
other words, the composite signal
with non-perceptual
compression
occupies only 600kbps down to
300kbps network capacity. Unlike the
psychoacoustic
perceptual
codecs
often used in audio data reduction,
where the recovered content does
not
precisely match the original,
the content recovered by MPX must
exactly match the original in term
of
level
and phase to generate
an accurate and transparent FM
deviation.
APT's well-deserved reputation is
based on the successful placement
of an audio format
that
one of the broadcast
establishes
a
new
remains
industry's
indispensable de facto standards.
Today, WorldCast
format
transmission.
Systems
that
carries the same quality standards
for composite/MPX
As a result, APTmpX is not only less
complex but also equally flexible in
offering a suite of formats.
Packaged in IP packets, APTmpX
has low latency and is remarkably
resilient
to packet
loss. Unlike
formats that organize IP packets in a
group, each APTmpX packet content
can be decoded
independently.
Therefore, packet loss only affects
the content of the affected packet.
The uniform packaging of
payload
the
is
APTmpX's
excellent
also the reason for
suitability
for
synchronizing transmitters. APT's
SynchroStream technology
APTmpX
are synonymous
and
with
the most precise FM synchronous
frequency networks (SFN).
A codec equipped with APTmpX is
free from any ties to an eco-system.
It connects to any sound processor
in the studio and any transmitter in
the field. Ideally, signal production,
processing, and transport
should
be entirely in the digital domain.
A proven digital
support
interface is
AES192 and is supported by most
processors. However, since not all
FM transmitters
APTmpX can be output as
highest
latency
AES192,
highquality
analog MPX.
APTmpX sets the standard
signal
for
fidelity with best
performance, making it
easy to ensure a consistent sound
signature across the transmitter
network. Furthermore, APTmpX
removes the remaining drawback of
MPX transmission, namely the need
for high network bandwidth.
Since a centrally generated MPX/
composite signal eliminates much
of the composite equipment
network
at
transmitter sites, in addition to
the obvious
savings,
several stations have already saved
hardware and transmission costs
with APTmpX. - APTmpX is available
as a software option for APT IP
codecs.
" Thanks
to its
WorldCast Systems engineers highperforming,
reliable and innovative
broadcast solutions
to
the Radio
& TV industry worldwide, meeting
the needs of both international
broadcast networks and small private
stations. Its industry leading brands
include APT, Ecreso, and Audemat,
with an extensive offer including
audio codecs and mobile network
access for
remotes and OBs, FM
transmitters, RDS encoding and
sound processing, and RF signal
monitoring, test and measurement.
WorldCast Systems
low complexity
and easy integration, APTmpX has
already proven itself as the ultimate
solution to enable a 100% digital
transmission chain, bridging
transition from digital studios
the
to
digital transmitters, " comments
Gregory Mercier, Director of Product
Marketing, WorldCast
Systems.
" With these new versions, we bring
its power to a whole new section of
the market, allowing broadcasters in
areas of poor bandwidth penetration
to deliver stunning audio quality to
their audiences no matter what they
are listening on. "
is a part of
WorldCast Group. Headquartered in
Bordeaux, France, and with offices
in the UK, the US, and Malaysia, the
group generates more than 85% of its
turnover internationally.
https://www.worldcastsystems.com
Ideally, signal production, processing, and transport
should be entirely in the digital domain
http://www.inbroadcast.com https://inbroadcast.com/news/worldcast-systems-launch-aptmpx https://inbroadcast.com/news/worldcast-systems-launch-aptmpx https://www.worldcastsystems.com https://inbroadcast.com/news/worldcast-systems-launch-aptmpx

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
InBroadcast - April 2022 - 5
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InBroadcast - April 2022 - Cover3
InBroadcast - April 2022 - Cover4
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