In Broadcast - January 2014 - 70


I N T E R N A T I O N A L

WWW.INBROADCAST.COM | ISSUE 27 - JANUARY 2014

N E W S

InTEST

OTT Is A Hybrid: It's How
You Look At It That Counts
By Simen Frostad
Chairman, Bridge Technologies

T

70

he spectacular growth in the
OTT sector over the past 18
months shows no sign of slowing.
The major broadcasters and
aggregators see OTT as a way
of driving customer engagement,
enriching the brand, and providing
subscribers with the additional
ways of consuming content that
they now expect.
Recent surveys have shown
how many TV viewers now watch
with some form of mobile device
(phone or pad) on their laps,
and broadcasters want to keep
reaching those viewers through
their devices as well as the TV.
OTT also offers broadcasters
new opportunities for targeting
audiences and audience segments,
and packaging services and
content to them. The 'connected

TV' experience is a two-way thing:
viewers like the ability to watch
content on the iPad wherever
they are, and broadcasters like
the ability to remain connected
to the subscriber when they are
not watching TV.

Challenges

But the technical and personnel
challenges of establishing a
glossy, compelling OTT offering
are still daunting. OTT isn't a purely
broadcast affair, and it isn't purely
IT either. Skill sets that bridge
both domains are rare, and staff
from a broadcast engineering
background often struggle to grasp
the implications of the strange
broadcast/IT hybrid operation that
has to be built for an OTT service.
Likewise, IT people often find the

broadcast component difficult to
get to grips with.
All of which means that the tools
used to build, analyse, test and
monitor OTT infrastructures have
something of a translation job to do.

Monitoring

They need to help broadcasters
understand IP a bit better, and
help IT people interpret broadcast
technology accurately. One way
this can be done is to provide
an analysis and monitoring
environment that integrates both
conventional broadcast services
and OTT services and presents
monitoring data from both using
the same set of UI conventions.
A broadcast engineer is unlikely
to feel comfortable reading through
a screen full of code, just as an IT
engineer might glaze over when
faced with a constellation diagram.
But with a clear, consistent colourcoded graphical presentation of
data from both domains, the
hybrid becomes a little more
comprehensible and users can
begin to develop a 'feel' for the

OTT consistency is vital

unfamiliar parts of it, and how the
hybrid behaves as a whole.
Just as it would make no sense
to set up parallel monitoring
systems for OTT and broadcast,
it makes no sense to allow staff
from a broadcast or IT background
to become isolated in their own
cliques, concerned only with the
technology they are already familiar
with, and too ready to pass the
buck when problems arise.
A comprehensive integrated
approach to monitoring and
interpreting both domains together
is the key to breaking down
these barriers.

OmniTek Keep Tabs On Loudness & Quality
L

oudness level, picture quality,
audio quality and lip-sync aren't
just aspects of a broadcast that
need to be maintained as part of a
broadcaster's service to viewers,
with acts such as the CALM Act in
the US, there can also be a legal
requirement to ensure that these
are kept within strict limits at all
times.
An important role for Test &

Measurement equipment is
therefore to monitor parameters
such as loudness level and picture
quality across all the various
programmes and advertisements
that are transmitted and to report
where these parameters go outside
the required levels.
With OmniTek's OTM and OTR
waveform analysers, the facility
to monitor these parameters is

OmniTek Loudness Monitoring options. Top: Loudness Meters (Surround
Sound); Bottom: Loudness Log Schedule and Loudness History Trace

provided through software options.
For instance, picture quality
monitoring is supported through
a PQA option that provides realtime determination of PSNR and
Macroblock counts along with
proprietary edge and/or lumacompensated versions of these
standard metrics, a selection of
difference images and an edge map.
This PQA option also uses ITU-R
BS.1387-1 algorithms to provide
an assessment of audio quality,
expressed in terms of the PEAQ
model parameters. An AV_ISD option
provides a novel form of 'In Service'
Lip Sync monitor that takes all the
information needed to correlate
motion and scene changes directly
from a 'fingerprint' of the video
currently being broadcast, while
loudness monitoring is supported
by an AUDIO_LOUD option. This
offers displays showing both current
and historical values of Momentary
Loudness, Short-term Loudness,
Integrated Loudness, Programme
Loudness and Loudness Range
(LRA) - all determined in accordance
with BS.1770-1 and EBU R128.
However the key features of the
OmniTek analysers for keeping tabs
on these various parameters are

the options the systems offer for
reporting where the values they
measure fall outside the limits you
specify for these parameters. For
immediate feedback, the current
value of any parameter can be seen
either in the Status Overview or one
of the status summaries.
These displays both use red/green
'traffic light'. For longer-term analysis,
a range of log files can be generated
complete with timing data - ranging
from 'event logs' to dedicated logs
that record the values of the various
loudness parameters every second
to a file on disk for analysis outside
of the OTM/OTR system.
The limits that you want to apply
to the various factors are recorded
in the analysers' Video Configuration
and Audio Configuration displays,
with options alongside that enable
you to select whether you want to
flag an error or raise a warning when
the parameter goes out of range and
whether you want the parameter
included in event logs.
You can also opt to trigger an
alarm when the parameter goes out
of range and/or generate an SNMP
trap, which can be used with an
SNMP Manager such as LabVIEW
for remote control.


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Table of Contents for the Digital Edition of In Broadcast - January 2014

In Broadcast - January 2014
Contents
InNews: Full Sail Uni Selects Avid Systems
InNews: Luxembourg Charm Success
InForm: Guntermann & Drunck Intensify Security
InReply: Datavideo – Designed for Versatility
InStudio: Filmmaker Captures Wildlife With Vinten
InGear: Frezzi Skylight – Advanced Led Lighting
InTest: OTT Is a Hybrid: It’s How You Look at It
In Broadcast - January 2014 - Intro
In Broadcast - January 2014 - In Broadcast - January 2014
In Broadcast - January 2014 - Cover2
In Broadcast - January 2014 - Contents
In Broadcast - January 2014 - InNews: Full Sail Uni Selects Avid Systems
In Broadcast - January 2014 - 5
In Broadcast - January 2014 - InNews: Luxembourg Charm Success
In Broadcast - January 2014 - 7
In Broadcast - January 2014 - 8
In Broadcast - January 2014 - 9
In Broadcast - January 2014 - 10
In Broadcast - January 2014 - 11
In Broadcast - January 2014 - 12
In Broadcast - January 2014 - 13
In Broadcast - January 2014 - 14
In Broadcast - January 2014 - 15
In Broadcast - January 2014 - 16
In Broadcast - January 2014 - 17
In Broadcast - January 2014 - 18
In Broadcast - January 2014 - 19
In Broadcast - January 2014 - 20
In Broadcast - January 2014 - 21
In Broadcast - January 2014 - 22
In Broadcast - January 2014 - 23
In Broadcast - January 2014 - InForm: Guntermann & Drunck Intensify Security
In Broadcast - January 2014 - 25
In Broadcast - January 2014 - 26
In Broadcast - January 2014 - 27
In Broadcast - January 2014 - InReply: Datavideo – Designed for Versatility
In Broadcast - January 2014 - 29
In Broadcast - January 2014 - 30
In Broadcast - January 2014 - 31
In Broadcast - January 2014 - 32
In Broadcast - January 2014 - 33
In Broadcast - January 2014 - 34
In Broadcast - January 2014 - 35
In Broadcast - January 2014 - 36
In Broadcast - January 2014 - 37
In Broadcast - January 2014 - 38
In Broadcast - January 2014 - 39
In Broadcast - January 2014 - 40
In Broadcast - January 2014 - 41
In Broadcast - January 2014 - InStudio: Filmmaker Captures Wildlife With Vinten
In Broadcast - January 2014 - 43
In Broadcast - January 2014 - 44
In Broadcast - January 2014 - 45
In Broadcast - January 2014 - InGear: Frezzi Skylight – Advanced Led Lighting
In Broadcast - January 2014 - 47
In Broadcast - January 2014 - 48
In Broadcast - January 2014 - 49
In Broadcast - January 2014 - 50
In Broadcast - January 2014 - 51
In Broadcast - January 2014 - 52
In Broadcast - January 2014 - 53
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In Broadcast - January 2014 - 65
In Broadcast - January 2014 - 66
In Broadcast - January 2014 - 67
In Broadcast - January 2014 - 68
In Broadcast - January 2014 - 69
In Broadcast - January 2014 - InTest: OTT Is a Hybrid: It’s How You Look at It
In Broadcast - January 2014 - 71
In Broadcast - January 2014 - 72
In Broadcast - January 2014 - 73
In Broadcast - January 2014 - 74
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In Broadcast - January 2014 - S1
In Broadcast - January 2014 - S2
In Broadcast - January 2014 - S3
In Broadcast - January 2014 - S4
In Broadcast - January 2014 - S5
In Broadcast - January 2014 - S6
In Broadcast - January 2014 - S7
In Broadcast - January 2014 - S8
In Broadcast - January 2014 - S9
In Broadcast - January 2014 - S10
In Broadcast - January 2014 - S11
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