In Broadcast - February 2014 - 78


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

WWW.INBROADCAST.COM | ISSUE 28 - FEBRUARY 2014

N E W S

InTEST

Video Test And Measurement

Video test and measurement (T&M) equipment has been the backbone of broadcast engineering from
the earliest days of television. InBroadcast examines recent developments...
By
Kevin Hilton
Contributing
Editor

O

78

scilloscopes, spectrum
analysers and waveform
monitors have measured gamut
and optical signal to noise ratios
- to name only a few parameters for decades. While they continue
to play an important role in the
setting up of monitor screens
and other equipment, the shift to
file-based broadcast operations
and the growing use of software
programs for quality control (QC) of
TV programmes is bringing major
changes in how and where in the
production chain T&M is done.
International and regional
specifications for broadcast
standards have been set over the
years but many broadcasters and
equipment manufacturers have
interpreted these in their own way
to the point where definitions of
basic tests can vary from country
to country and product to product.
The EBU (European Broadcasting
Union) is now in the final phases
of producing an agreed and
harmonised set of terms and tests
that will guarantee consistency in
QC and quality assurance (QA).
The first version of QC Criteria
(EBU Tech 3363), along with an eyecatching 'periodic table' that lays
out various tests in the categories
of audio, video, format/bit stream
and metadata/other, was published

A recent addition to Hamlet Video International's product range,
the DigiScope DS900G, which won a Star Award at IBC 2013

during IBC 2013. The EBU is also
working with the AMWA (Advanced
Media Workflow Association) on the
FIMS (Framework for Interoperable
Media Services) project into TV
production QA.
The EBU Strategic Group for
QC, chaired by BBC HD's Head of
Technology Andy Quested, is close
to finishing the final list of tests, with
the hope of issuing completed
recommendations in April or May.
Although also heading up the BBC's
Work into QC, Quested outlined the
development of new approaches to
T&M and QC in his role with the EBU,
explaining that work started on a
small scale close to two years ago.
From there more people contributed
suggestions until there was a
"massive list" of over 500 tests. This
has taken the Strategic Group six
months to hone into "something
more manageable".
Quested explains that some of
the entries were requirements rather
than tests: "And other tests turned
out to be the same as each other but

under different names.
What we're working on
now is about 160 tests for
base band audio and video and files
containing both sound and vision."
Four main categories of testing
have been formulated: regulatory,
absolute, objective and subjective.
A key video regulation is PSE
(photosensitive epilepsy) testing;
absolute includes areas that are
covered by formal regulations
in some regions but which are
organised on a more agreementbased footing in others, while still
being necessary. Objective relates
to non-negotiable, recognisable
problems like lip-sync; subjective
testing relies on the judgement and
common sense of an operator to
determine whether something is a
fault or, in the case of old footage
or a flickery effect to replicate a
silent picture look, is deliberate. "It's
about context as much as technical
standards," Quested explains.
The tests have been arranged in
the style of the periodic table of
elements because, says Quested,
there is a "horizontal and vertical"

structure to the new approach,
highlighting where each test
should take place in the workflow.
Vision tests include: digital
tape dropouts, blanking errors,
deinterlacing artefacts, video
clipping and video noise.
John Pallett,
Director of Product
Marketing for
Enterprise Products
at Telestream

customers
"...Ourfor systems that
look
can automatically
correct certain types
of errors instead of
just reporting them

"

The end result for broadcasters
will be the first time everyone will
agree on how test parameters are
defined. "People will be able to look
at what is being tested, such as
video levels or gamut, and it will
be done in the same way across
broadcasters with no differences
because everybody will know what
is meant by a certain test," says
Quested. On the manufacturing
side Quested says this will allow QC

Telestream Vantage, a file-based
automated video processing and
workflow offering some QC functions
and integration with party- systems
Periodic Table of QC Criteria (Source: EBU)

CONTINUED ON PAGE 80


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In Broadcast - February 2014

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

In Broadcast - February 2014
Contents
InNews: Russia's Channel One Looks to Elemental
InNews: Eurosport Teams With SNTV for News Content
InStudio: Integration Is the Aim, but Is Our Aim True?
InGear: Chopperguy Relies on Aja Ki Pro Mini
InGear: NBC Olympics to Utilise Five Artemis Consoles
InGear: Sony Reduces 4K Camcorder Size
InMedia: The Connected Room 1990 – 2020 & Beyond
In Broadcast - February 2014 - Intro
In Broadcast - February 2014 - In Broadcast - February 2014
In Broadcast - February 2014 - Cover2
In Broadcast - February 2014 - Contents
In Broadcast - February 2014 - InNews: Russia's Channel One Looks to Elemental
In Broadcast - February 2014 - 5
In Broadcast - February 2014 - InNews: Eurosport Teams With SNTV for News Content
In Broadcast - February 2014 - 7
In Broadcast - February 2014 - 8
In Broadcast - February 2014 - 9
In Broadcast - February 2014 - 10
In Broadcast - February 2014 - 11
In Broadcast - February 2014 - 12
In Broadcast - February 2014 - 13
In Broadcast - February 2014 - 14
In Broadcast - February 2014 - 15
In Broadcast - February 2014 - 16
In Broadcast - February 2014 - 17
In Broadcast - February 2014 - 18
In Broadcast - February 2014 - 19
In Broadcast - February 2014 - 20
In Broadcast - February 2014 - 21
In Broadcast - February 2014 - 22
In Broadcast - February 2014 - 23
In Broadcast - February 2014 - 24
In Broadcast - February 2014 - 25
In Broadcast - February 2014 - 26
In Broadcast - February 2014 - 27
In Broadcast - February 2014 - 28
In Broadcast - February 2014 - 29
In Broadcast - February 2014 - 30
In Broadcast - February 2014 - 31
In Broadcast - February 2014 - 32
In Broadcast - February 2014 - 33
In Broadcast - February 2014 - 34
In Broadcast - February 2014 - 35
In Broadcast - February 2014 - 36
In Broadcast - February 2014 - 37
In Broadcast - February 2014 - 38
In Broadcast - February 2014 - 39
In Broadcast - February 2014 - 40
In Broadcast - February 2014 - 41
In Broadcast - February 2014 - 42
In Broadcast - February 2014 - InStudio: Integration Is the Aim, but Is Our Aim True?
In Broadcast - February 2014 - 44
In Broadcast - February 2014 - 45
In Broadcast - February 2014 - 46
In Broadcast - February 2014 - 47
In Broadcast - February 2014 - 48
In Broadcast - February 2014 - 49
In Broadcast - February 2014 - InGear: Chopperguy Relies on Aja Ki Pro Mini
In Broadcast - February 2014 - 51
In Broadcast - February 2014 - InGear: NBC Olympics to Utilise Five Artemis Consoles
In Broadcast - February 2014 - 53
In Broadcast - February 2014 - 54
In Broadcast - February 2014 - 55
In Broadcast - February 2014 - 56
In Broadcast - February 2014 - 57
In Broadcast - February 2014 - InGear: Sony Reduces 4K Camcorder Size
In Broadcast - February 2014 - 59
In Broadcast - February 2014 - 60
In Broadcast - February 2014 - 61
In Broadcast - February 2014 - 62
In Broadcast - February 2014 - 63
In Broadcast - February 2014 - 64
In Broadcast - February 2014 - 65
In Broadcast - February 2014 - 66
In Broadcast - February 2014 - 67
In Broadcast - February 2014 - 68
In Broadcast - February 2014 - 69
In Broadcast - February 2014 - 70
In Broadcast - February 2014 - 71
In Broadcast - February 2014 - InMedia: The Connected Room 1990 – 2020 & Beyond
In Broadcast - February 2014 - 73
In Broadcast - February 2014 - 74
In Broadcast - February 2014 - 75
In Broadcast - February 2014 - 76
In Broadcast - February 2014 - 77
In Broadcast - February 2014 - 78
In Broadcast - February 2014 - 79
In Broadcast - February 2014 - 80
In Broadcast - February 2014 - 81
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In Broadcast - February 2014 - 83
In Broadcast - February 2014 - 84
In Broadcast - February 2014 - 85
In Broadcast - February 2014 - S1
In Broadcast - February 2014 - S2
In Broadcast - February 2014 - S3
In Broadcast - February 2014 - S4
In Broadcast - February 2014 - S5
In Broadcast - February 2014 - S6
In Broadcast - February 2014 - S7
In Broadcast - February 2014 - S8
In Broadcast - February 2014 - S9
In Broadcast - February 2014 - S10
In Broadcast - February 2014 - S11
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