In Broadcast - August 2015 - 34


34

www.inbroadcast.com | Vol: 5 - Issue 8 | August 2015

InPreview

The Changing Face Of
Subtitling Technology
Screen Subtitling Systems has been at the forefront of developments in subtitling technology,
but, as Screen's Head of PR & Marketing, Dean Wales explains, IBC 2015 marks a significant
change in how the manufacturer is making its subtitle delivery systems available...

A

nybody working in broadcast
technology who has had their
ear remotely near the ground over
the past two to three years, will
have been poised for a significant
shift in media consumption, and the
consequent swing over to an IT-based
infrastructure for its delivery.
Indeed many of us sat through the
unashamedly candid The Telecoms Are
Coming panel presentation at the 2013
IABM AGM conference, corroborating
to
us
traditional
broadcast
manufacturers how they can do what
we do by employing IT.
The majority vote from the delegates
back then on whether that was seen
as a threat however was a resounding
'no'. And yet in spite of ceaseless
warnings, prepared for the change
or not, the speed at which media
consumption has changed and the
affect it has had on our industry has
knocked the wind out some of even the
most astute manufacturing executives.
Screen Choice
Smart devices and connected home
entertainment systems have resulted
in the viewer calling the shots on
where and when they consume
their exact choice of media. Reports
unequivocally reveal that whilst media
consumption is on a rapid rise, the
time the consumer spends in front of
a traditional TV is dropping away at an
extraordinary rate.
The sheer fact alone that some of the
most heavily viewed content is being
produced by web streaming services
gives us a reliable insight into the
future.
The pace of consumer transition
from traditional to alternative

platforms shows
no signs of
slowing down,
and we have little option other than
embrace this evolution or be left by
the wayside.
Title Challenge
As the pioneers of the electronic
subtitling system, since the 1970s
Screen has faced colossal changes in
the industry, and each time has had
to rise to the challenge to develop
premium subtitling technology that
continues to deliver to the same
high standards associated with our
company.
With the advent of HD, much of
the industry understood the need
to reduce the threat of the viewing
experience being devalued by poor
subtitles, and so turned to Screen's
Polistream BLACK transmission system
- a proven solution for transmitting
high-definition subtitles.
This is a trend which has continued
throughout the HD rollout across the
world.
The Polistream BLACK system from
Screen uses DVB Bitmaps at sub-pixel
level to generate high quality subtitles,
and its decoder technology is already
there for producing them in 4K.
The burgeoning ability of delivering
premium video services over the
internet to television and other
connected devices has also presented
a new and altogether different
challenge for anyone providing
accessibility services for viewers.
Most standard web-video players
use a simple timed-text file for OTT
subtitling (e.g. SRT for YouTube, DFXP
for Flash and QuickTime and SMIL

for
Windows
Media Player).
However these
solutions rely on this timed-text file
being interpreted by the video player
and as a result the appearance of the
subtitles can differ between players
and devices, with positioning being
particularly inconsistent. It is evident
that some early implementations
positioned text within a black box
beneath the main video window, and
so the subtitles were never actually
overlaid within the video picture area.
This means that the subtitle-author
cannot ever be sure as to how the
subtitles will appear in font, style or
position.
For
accurate
and
consistent
presentation of subtitles on web and
OTT content, Screen saw the need for
a different solution to overcome the
potential uncertainties.
Precise Display
Screen's OTT and web subtitling
system offers a method for served web
video playback that guarantees that
subtitles are always displayed in the
style intended regardless of the video
player being used.
This effective solution also allows the
viewer to select from several language
streams and of course switch them
off altogether, without the need to
re-encode the video or host multiple
copies.
The benefits of the Screen OTT web
subtitle system include:
*	 The producer has full creative
control over style and position;
*	 Text is clear as it's not affected by
the video compression;
*	 It allows the viewer to select the

language or turn subtitles off;
*	 It uses standard subtitle
file formats;
*	 It can automatically adjust
a broadcast version for the
web via EDL;
Over and above these technological
transformations, business models
and consequently the needs of
broadcasters and facilities have more
or less been turned on their head.
Adapting to this has in many ways
proven to be more of a challenge
to suppliers than the change in
technology itself.
Changing Views
Screen has had to remodel the
delivery of its mainstay product
Polistream in order to satisfy the
current requirements of its customers.
Traditionally supplied in our rackable
universal 1U case, Screen has had to
broaden the methods of provision of
its subtitle delivery system.
Still available in its conventional 1U
arrangement, Screen's Polistream
solution will soon be available in
certain configurations in either a
Virtual Machine form, or available
for customers to install on their own
hardware, labelled as a Bring-YourOwn-Device or Off-The-Shelf option.
To cast the appeal further to smaller
facilities and short-term projects,
Screen has also announced what
it's calling its OPEX option where
a complete Polistream subtitling
delivery system can be supplied purely
on a rental basis.
Screen will be exhibiting at IBC
and will be available to discuss new
Polistream configurations at their
stand.

Screen's Conventional Polistream System - now available to rent, as a virtual machine option, or on a Bring-Your-Own-Device basis


http://www.inbroadcast.com http://www.screensystems.tv/ http://www.screensystems.tv/products/polistreamblack/

Table of Contents for the Digital Edition of In Broadcast - August 2015

In Broadcast - August 2015 - Intro
In Broadcast - August 2015 - Cover1
In Broadcast - August 2015 - Cover2
In Broadcast - August 2015 - 3
In Broadcast - August 2015 - 4
In Broadcast - August 2015 - 5
In Broadcast - August 2015 - 6
In Broadcast - August 2015 - 7
In Broadcast - August 2015 - 8
In Broadcast - August 2015 - 9
In Broadcast - August 2015 - 10
In Broadcast - August 2015 - 11
In Broadcast - August 2015 - 12
In Broadcast - August 2015 - 13
In Broadcast - August 2015 - 14
In Broadcast - August 2015 - 15
In Broadcast - August 2015 - 16
In Broadcast - August 2015 - 17
In Broadcast - August 2015 - 18
In Broadcast - August 2015 - 19
In Broadcast - August 2015 - 20
In Broadcast - August 2015 - 21
In Broadcast - August 2015 - 22
In Broadcast - August 2015 - 23
In Broadcast - August 2015 - 24
In Broadcast - August 2015 - 25
In Broadcast - August 2015 - 26
In Broadcast - August 2015 - 27
In Broadcast - August 2015 - 28
In Broadcast - August 2015 - 29
In Broadcast - August 2015 - 30
In Broadcast - August 2015 - 31
In Broadcast - August 2015 - 32
In Broadcast - August 2015 - 33
In Broadcast - August 2015 - 34
In Broadcast - August 2015 - 35
In Broadcast - August 2015 - 36
In Broadcast - August 2015 - 37
In Broadcast - August 2015 - 38
In Broadcast - August 2015 - 39
In Broadcast - August 2015 - 40
In Broadcast - August 2015 - 41
In Broadcast - August 2015 - 42
In Broadcast - August 2015 - 43
In Broadcast - August 2015 - 44
In Broadcast - August 2015 - 45
In Broadcast - August 2015 - 46
In Broadcast - August 2015 - 47
In Broadcast - August 2015 - 48
In Broadcast - August 2015 - 49
In Broadcast - August 2015 - 50
In Broadcast - August 2015 - 51
In Broadcast - August 2015 - 52
In Broadcast - August 2015 - 53
In Broadcast - August 2015 - 54
In Broadcast - August 2015 - 55
In Broadcast - August 2015 - 56
In Broadcast - August 2015 - 57
In Broadcast - August 2015 - 58
In Broadcast - August 2015 - 59
In Broadcast - August 2015 - 60
In Broadcast - August 2015 - 61
In Broadcast - August 2015 - 62
In Broadcast - August 2015 - 63
In Broadcast - August 2015 - 64
In Broadcast - August 2015 - 65
In Broadcast - August 2015 - 66
In Broadcast - August 2015 - 67
In Broadcast - August 2015 - 68
In Broadcast - August 2015 - 69
In Broadcast - August 2015 - 70
In Broadcast - August 2015 - 71
In Broadcast - August 2015 - 72
In Broadcast - August 2015 - 73
In Broadcast - August 2015 - 74
In Broadcast - August 2015 - 75
In Broadcast - August 2015 - 76
In Broadcast - August 2015 - 77
In Broadcast - August 2015 - 78
In Broadcast - August 2015 - 79
In Broadcast - August 2015 - 80
In Broadcast - August 2015 - 81
In Broadcast - August 2015 - S1
In Broadcast - August 2015 - S2
In Broadcast - August 2015 - S3
In Broadcast - August 2015 - S4
In Broadcast - August 2015 - S5
In Broadcast - August 2015 - S6
In Broadcast - August 2015 - S7
In Broadcast - August 2015 - S8
In Broadcast - August 2015 - S9
In Broadcast - August 2015 - S10
In Broadcast - August 2015 - S11
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https://europe.nxtbook.com/nxteu/lesommet/inbroadcast_202402
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http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_NewYork2018
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http://europe.nxtbook.com/nxteu/lesommet/inbroadcast_inshowguide2018
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