In Broadcast - May 2017 - 58

58

www.inbroadcast.com | Vol: 7 - Issue 5 | May 2017

InTech

Next Generation
Audio for Broadcast
By Peter Poers,
Managing Director, J√ľnger Audio...

T

he world of broadcast audio is on
the verge of a major revolution.
Numerous "3D Immersive" formats are
under development and will find their
way into the mainstream of broadcast
production and distribution in the near
future. Unlike the world of channel
based coding as we are accustomed
to, these new formats will support
more channels and/or object based
audio coding. For the end consumer,
there will be two major benefits from
this new approach, a greater sense
of involvement or immersion, and a
degree of personalisation.
Greater involvement will come from
an increased channel count typically
by the addition of overhead "height"
channels. This creates a "3D" sound
image where the viewer or listener is
immersed in audio in all dimensions.

Object based audio will give the
user the option to personalise their
experience by selecting from a number
of audio sources, and controlling the
level and maybe even the position
in the mix. In object based audio,
an "object" is essentially an audio
stream with accompanying descriptive
metadata. The metadata carries
information about where the object
is in the mix and at what level, and is
used to render the audio experience
for the end user. Objects may be
static and placed at a fixed point in
the mix, or dynamic where they are
panned across the three dimensional
soundscape.
Does this mean multiple speakers
need to be installed to avail of these
new benefits? Not necessarily,
although of course the best experience

Revolution: 3D immersive sound

will result from a full installation of
discrete speakers at both floor level
and overhead, however where this
is not practical, the final "renderer"
will re-create the mix as accurately
as possible based on the actual
number and location of speakers the
end user has. An increasing number
of soundbars that are designed to
sit underneath a display are already

available to create a surround
experience
without
consuming
valuable space.
What does this all mean for the
broadcaster? A complete re-build of
existing facilities and a total re-think
about the audio processing equipment
required for outside broadcast
vehicles? Well, if we get
it right, it should entail
just relatively minimal
changes
to
overall
workflow and hardware,
but inevitably some
additions to production
and
distribution
equipment.
In
the
case of object based
audio, the metadata
appropriate for the
final codec needs to
be created and added to the audio
for distribution, and the engineer
needs to be able to monitor this
complex mix (and all the potential
downmix variations) to ensure that
the distribution chain is fed with all
available objects correctly. Loudness
levels should also be considered in
respect of existing standards and there
should be provision for local insertion
of content at any point in the chain.

Broadcast 'Edgeware' Applications
By Bluebell Opticom Managing Director,
Paul McCann...

I

n years gone by broadcast broadcast type signals and the IP
engineering was undertaken by a world. This will allow BNC and XLR
select few highly skilled people who technology to be transported over IP
understood end-to-end how images of networks. The user interface remains
actors, sportsmen and presenters got the same but the transport technology
from in front of the camera to your is new, so allowing existing equipment
TV at home. We all had only one TV in to be repurposed for IP delivery.
those days. And there were far fewer
Our new Camera Back unit is now
TV channels too. Fast forward from fully in production. The BCX-760 is
525/625 Line NTSC, PAL and SECAM designed to convert a basic camcorder
to today's 4K-SDI, Multi-screen OTT into a rackable professional camera
interactive viewing. The amount of channel. It slots in between the
data is now enormous and the delivery camera body and the battery. Neat,
mediums are rich and varied and are compact and very powerful...
all being used in unison to provide
the modern experience. The
technical requirements for realtime interactive multi-screening
from the comfort of your own
sofa are substantial.
Bluebell based close to London
has come up with an IP Gateway
product range called 'Edgware'. This Mux/Demux
is effectively a bridge between current unit, the BC390

12G-SDI or 4K UHD TV is
commonplace.
So
many
productions are now shot in 4K
even if they don't get broadcast
in that format. All the camera
manufacturers are in this market
space and storage is getting
bigger in a smaller physical size.
We have come up with several
products for this. As always with
Bluebell its Fibre Optic transport.
We have a straight 12G-SDI to
Fibre Converter range, the BN365.
This will convert a single channel
of 12G-SDI on one BNC to fibre and
back.
We are launching our Mux/
Demux unit, the BC390. This
receives 4 x 3G-SDI and serialises it
to 1 x 12G-SDI on both a BNC and a
Fibre Port. It will also do the reverse.
This is the first of a range of
modules that will up/down
and cross convert HD-SDI,
3G-SDI, 6G-SDI and 12G-SDI.
It is aimed squarely at
the 12G market but it can be
implemented in other ways. If you

BCX-760
Camera Back unit

have a HD or 3G-SDI CWDM
network and you are running out of
wavelengths, using the BN390 puts
4 x 3G-SDI onto one wavelength. This
allows you to quadruple your payload
and with very little extra cost. Neat.


http://www.inbroadcast.com http://junger-audio.com/ http://bluebellcomms.co.uk/ http://bluebellcomms.co.uk/

Table of Contents for the Digital Edition of In Broadcast - May 2017

Contents
In Broadcast - May 2017 - Intro
In Broadcast - May 2017 - Cover1
In Broadcast - May 2017 - Cover2
In Broadcast - May 2017 - Contents
In Broadcast - May 2017 - 4
In Broadcast - May 2017 - 5
In Broadcast - May 2017 - 6
In Broadcast - May 2017 - 7
In Broadcast - May 2017 - 8
In Broadcast - May 2017 - 9
In Broadcast - May 2017 - 10
In Broadcast - May 2017 - 11
In Broadcast - May 2017 - 12
In Broadcast - May 2017 - 13
In Broadcast - May 2017 - 14
In Broadcast - May 2017 - 15
In Broadcast - May 2017 - 16
In Broadcast - May 2017 - 17
In Broadcast - May 2017 - 18
In Broadcast - May 2017 - 19
In Broadcast - May 2017 - 20
In Broadcast - May 2017 - 21
In Broadcast - May 2017 - 22
In Broadcast - May 2017 - 23
In Broadcast - May 2017 - 24
In Broadcast - May 2017 - 25
In Broadcast - May 2017 - 26
In Broadcast - May 2017 - 27
In Broadcast - May 2017 - 28
In Broadcast - May 2017 - 29
In Broadcast - May 2017 - 30
In Broadcast - May 2017 - 31
In Broadcast - May 2017 - 32
In Broadcast - May 2017 - 33
In Broadcast - May 2017 - 34
In Broadcast - May 2017 - 35
In Broadcast - May 2017 - 36
In Broadcast - May 2017 - 37
In Broadcast - May 2017 - 38
In Broadcast - May 2017 - 39
In Broadcast - May 2017 - 40
In Broadcast - May 2017 - 41
In Broadcast - May 2017 - 42
In Broadcast - May 2017 - 43
In Broadcast - May 2017 - 44
In Broadcast - May 2017 - 45
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In Broadcast - May 2017 - Cover3
In Broadcast - May 2017 - Cover4
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