In Broadcast - July 2016 - 72
72
www.inbroadcast.com | Vol: 6 - Issue 7 | July 2016
InTech
Evaluating The Quality
Of HDR Video Content
UHD / 4K video offers a more immersive viewing experience, the next level of picture realism
is provided by high dynamic range imagery, Video Clarity has the tools to test this content
throughout the delivery chain, writes Adam Schadle...
T
hanks to pixel density about four
times that of HD, 4K technology
delivers a more immersive viewing
experience with never-before-seen
levels of clarity. And if 4K provides
the crisp picture, high dynamic range
(HDR) provides the detail. Applying
HDR colour technology to 4K images
enhances the picture by delivering
greater contrast, increased luminance,
and an expanded colour gamut - and
the result is unprecedented realism.
HDR provides a compelling reason
for people to make the switch
from HD televisions to UHD TVs,
and it's a compelling reason for
broadcasters and delivery-equipment
manufacturers to perfect the process
of applying a wider colour gamut to
UHD television. (Sooner or later it will
likely become a requirement, probably
based on the BT.2020 colour space
recommendation.)
For 4K HDR content to make it from
the camera to the television today, it
has to go through a colour-conversion
process during encoding. There are
various proposed ways to do that, such
as PQ with BT.2020, HLG with BT.2020,
and an approach that uses ICtCp colour
components. The industry is studying
all of those formats and techniques
right now, but at the moment there is
no standard.
Meanwhile, viewers (and advertisers)
expect to see accurate HDR content -
an expectation that will only increase
with time. Therefore, we must be able
to study the visual and perceptual
differences that result from enhanced
colour space and HDR.
Fortunately, it is possible to do
a side-by-side, visual comparison
between an HDR source and the
downstream version that appears
on the viewer's end. Video Clarity
has some unique tools to make the
most of this subjective approach, and
importantly, it works with any means
of colour conversion available today.
Subjective Interactive Comparison
The best way to subjectively analyse
and compare two different sequences
is to look at them on the same video
display. Using two different displays,
even of the same type, requires
vigilant calibration, which can slow
down the process and leave room for
error. Video Clarity's ClearView 4K
video quality analyser now provides
an effective way to judge HDR video
sequences on the same monitor, which
was not possible before.
The latest version of ClearView
4K ensures that the HDR source is
properly converted to YCbCr upon
import in compliance with ITU-R
BT.2020, and it checks that the signals
are aligned at output. It also supports
high dynamic range by allowing
interactive, side-by-side comparison
of HDR video clips in the Rec. BT.2020
colour space.
Meanwhile MultiPlayer,
an optional application
for ClearView 4K systems,
can automatically and
interactively
select
sequences for side-byside playback in multiple
video formats on up to
eight screens at once -
the only such product
that can do that.
Together these products
provide
a
powerful
way to perform visual
comparisons at different
resolutions and screen
sizes to see results and subjectively
rate the imagery. They can also
perform JND and DMOS calculations,
which give engineers a numerical
benchmark for quality.
The defining characteristic of the
ClearView products is their interactive
comparison function. They are the only
tools on the market that can rearrange
data on the fly so that any viewing
mode is available instantaneously. You
simply select a comparison view, and
playback starts immediately, with no
pre-rendering required.
ClearView viewing modes are:
* Side-by-side;
* Split mirror;
* Seamless split;
* A minus B with threshold
command;
* A minus B with addback
command.
Side-by-side and split-mirror modes
show only half of the image so that you
can pan the sequences. In seamless
split mode, part of the image comes
from the reference and the rest comes
from a processed version. In any case,
MultiPlayer, for ClearView 4K
systems, can select sequences
for side-by-side comparison
ClearView lets you move the split
point on the fly. Meanwhile, A minus
B mode provides an easy way to view
pixel-intensity differences between
two images. All of these views get
fed simultaneously to the ClearView
GUI and to each of ClearView's fullresolution video outputs. You also
have the option to feed them to a
separate desktop window.
Besides those exclusive subjectiveviewing capabilities, with a simple
button push ClearView can measure
any piece of HDR video regardless
of the HDR colour format at play. As
a result, you can switch seamlessly
between
colour
spaces
(and
between SDR and HDR measurement
workflows). Best of all, no matter what
the requirements are in the future,
you'll be able to rely on ClearView to
cover all of them simply by upgrading
the software.
Adam Schadle is the Vice President
of Video Clarity.
http://www.inbroadcast.com
http://videoclarity.com/PDF/ClearViewDataSheet.pdf
http://videoclarity.com/PDF/ClearViewDataSheet.pdf
Table of Contents for the Digital Edition of In Broadcast - July 2016
In Broadcast - July 2016 - Intro
In Broadcast - July 2016 - Cover1
In Broadcast - July 2016 - Cover2
In Broadcast - July 2016 - 3
In Broadcast - July 2016 - 4
In Broadcast - July 2016 - 5
In Broadcast - July 2016 - 6
In Broadcast - July 2016 - 7
In Broadcast - July 2016 - 8
In Broadcast - July 2016 - 9
In Broadcast - July 2016 - 10
In Broadcast - July 2016 - 11
In Broadcast - July 2016 - 12
In Broadcast - July 2016 - 13
In Broadcast - July 2016 - 14
In Broadcast - July 2016 - 15
In Broadcast - July 2016 - 16
In Broadcast - July 2016 - 17
In Broadcast - July 2016 - 18
In Broadcast - July 2016 - 19
In Broadcast - July 2016 - 20
In Broadcast - July 2016 - 21
In Broadcast - July 2016 - 22
In Broadcast - July 2016 - 23
In Broadcast - July 2016 - 24
In Broadcast - July 2016 - 25
In Broadcast - July 2016 - 26
In Broadcast - July 2016 - 27
In Broadcast - July 2016 - 28
In Broadcast - July 2016 - 29
In Broadcast - July 2016 - 30
In Broadcast - July 2016 - 31
In Broadcast - July 2016 - 32
In Broadcast - July 2016 - 33
In Broadcast - July 2016 - 34
In Broadcast - July 2016 - 35
In Broadcast - July 2016 - 36
In Broadcast - July 2016 - 37
In Broadcast - July 2016 - 38
In Broadcast - July 2016 - 39
In Broadcast - July 2016 - 40
In Broadcast - July 2016 - 41
In Broadcast - July 2016 - 42
In Broadcast - July 2016 - 43
In Broadcast - July 2016 - 44
In Broadcast - July 2016 - 45
In Broadcast - July 2016 - 46
In Broadcast - July 2016 - 47
In Broadcast - July 2016 - 48
In Broadcast - July 2016 - 49
In Broadcast - July 2016 - 50
In Broadcast - July 2016 - 51
In Broadcast - July 2016 - 52
In Broadcast - July 2016 - 53
In Broadcast - July 2016 - 54
In Broadcast - July 2016 - 55
In Broadcast - July 2016 - 56
In Broadcast - July 2016 - 57
In Broadcast - July 2016 - 58
In Broadcast - July 2016 - 59
In Broadcast - July 2016 - 60
In Broadcast - July 2016 - 61
In Broadcast - July 2016 - 62
In Broadcast - July 2016 - 63
In Broadcast - July 2016 - 64
In Broadcast - July 2016 - 65
In Broadcast - July 2016 - 66
In Broadcast - July 2016 - 67
In Broadcast - July 2016 - 68
In Broadcast - July 2016 - 69
In Broadcast - July 2016 - 70
In Broadcast - July 2016 - 71
In Broadcast - July 2016 - 72
In Broadcast - July 2016 - 73
In Broadcast - July 2016 - 74
In Broadcast - July 2016 - 75
In Broadcast - July 2016 - 76
In Broadcast - July 2016 - 77
In Broadcast - July 2016 - 78
In Broadcast - July 2016 - 79
In Broadcast - July 2016 - 80
In Broadcast - July 2016 - S1
In Broadcast - July 2016 - S2
In Broadcast - July 2016 - S3
In Broadcast - July 2016 - S4
In Broadcast - July 2016 - S5
In Broadcast - July 2016 - S6
In Broadcast - July 2016 - S7
In Broadcast - July 2016 - S8
In Broadcast - July 2016 - S9
In Broadcast - July 2016 - S10
In Broadcast - July 2016 - S11
In Broadcast - July 2016 - S12
In Broadcast - July 2016 - S13
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202410
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202409
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202408
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202407
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202406
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202405
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202404
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202403
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202402
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202401
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202312
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202311
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202310
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202309
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202308
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202307
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202306
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202305
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202304
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202303
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202302
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202301
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202212
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202211
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202210
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202209
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202208
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202207
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202206
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202205
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202204
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202203
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202202
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202201
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202112
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202111
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202110
https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202109
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202108
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202107
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202106
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202105
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_PTZ
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202104
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202103
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202102
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202101
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202012
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202011
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202010
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202009
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202008
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202007
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202006
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202005
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202004
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202003
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202002
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202001
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_INREVIEW2019
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201912
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201911
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_NewYork2019
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201910
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201909
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_inshowguide2019
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201908
http://europe.nxtbook.com/nxteu/lesommet/CTA-DAY3
http://europe.nxtbook.com/nxteu/lesommet/CTA-DAY2
http://europe.nxtbook.com/nxteu/lesommet/CTA-DAY1
http://europe.nxtbook.com/nxteu/lesommet/CTA-VISITOR
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201906
http://europe.nxtbook.com/nxteu/lesommet/CTA-PREVIEW
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201905
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201904
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_NABSHOW2019
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201903
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_cabsat2019
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201902
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201901
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_INREVIEW2018
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201812
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201811
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_NewYork2018
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201810
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_inshowguide2018
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201809
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201808
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201806
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201805
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201804
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_NABSHOW2018
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201803
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201802
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_cabsat2018
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201801
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201712
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201711
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201710
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_NABSHOWNYexpo2017
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201709
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_inshowguide2017
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201708
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201707
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201705
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_NABSHOW2017
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201704
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_cabsat2017
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201703
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201702
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201701
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_INREVIEW2016
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201612
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201611
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_NABSHOWNYexpo
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_20110708_DEMO
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201610
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_inshowguide2016
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201609
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201608
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201607
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201606
http://europe.nxtbook.com/nxtbooks/lesommet/inbroadcast_APAC03
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201605
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_NABSHOW2016
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201604
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201603
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_cabsat2016
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201602
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201601
https://www.nxtbook.com/nxtbooks/lesommet/inbroadcast_APAC02
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201512
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201511
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_CCW15expo
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201510
https://www.nxtbook.com/nxtbooks/lesommet/inbroadcast_APAC01
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201509
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_IBC2015
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201508
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201507
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201506
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_BROADCASTASIA2015
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201505
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201504
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_NABSHOW2015
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201503
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_cabsat2015
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201502
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201501
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201412
https://www.nxtbook.com/nxteu/lesommet/inbroadcast_201411
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201410
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201409
http://europe.nxtbook.com/nxteu/lesommet/inbroadcastIBCPRINTEDGUIDE_201409
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201408
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201407
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201406
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201405
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201404
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201403
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201402
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201401
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201312
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201311
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201310
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201309
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201308
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201307
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201306
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201305
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201304
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201303
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201302
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201301
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201211
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201210
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201209
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201208
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201207
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201206
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201205
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201204
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201203
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_201202
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_20121201
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_20111011
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_20110708
http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_20110506
https://www.nxtbookmedia.com