In Broadcast - CABSAT 2016 - 38


38

www.inbroadcast.com | CABSAT InShow Guide | 8 - 10 March 2016

High Dynamic Range
Video - Software is the
Solution
Elemental's software is allowing organisations to embrace HDR...
By Mark Horchler,
International Marketing Manager - EMEA

T

oday, there is much debate about instances. To the human eye, HDR allows some existing distribution
high dynamic range (HDR) as a more closely approximates what is architectures to carry HDR content,
means to improve video image quality visible in the natural world.
and is incorporated into the highin Ultra HD. The challenge is evident
The emergence of the OLED screen efficiency video coding (HEVC/H.265)
in colour space diagrams. ITU Rec. has raised the potential for HDR. compression standard.
709 defined the high definition (HD) OLED is an emissive technology: the
colour space in 1990, and was limited pixel itself generates light. In the best Compatibility
by the CRT display technology of the OLED screens, the black is remarkably
When colour TV was first introduced
time, including 8-bit colour. ITU Rec. black, and high output devices that it was backwards compatible: one
2020, published in 2012, defines a can generate bright white levels are signal could be viewed on black and
much wider colour gamut, matching available.
white and on colour receivers, where
the capabilities of today's flat screen
Between the two extremes, an OLED the black and white receiver ignored
displays. Delivering this expanded display is very linear. This raises the colour information. Today many
gamut requires more bits per colour to another benefit. Historically, a gamma industry players including Dolby,
provide a richer, more realistic viewing curve was used to make the most of Technicolour, Philips and BBC/NHK,
experience.
a CRT's available dynamic range. It advocate a backwards-compatible
8-bit systems offer 256 levels per ensured the best use of the available approach to HDR.
colour, or 256×256×256 (=16,777,216) bandwidth, enabling colourists to
Others, especially those working
different colours. In a 10-bit system, make artistic judgements about how in over-the-top (OTT) streaming
there are 1024 levels per colour, or the limited range of colours could be and Blu-ray 2, are less concerned
over a billion different shades.
used.
with
backwards
compatibility.
Video images with large areas of
The gamma curve has been replaced Implementing their proposals for
similar colour - a blue sky or a green by a new formula, the electro-optical broadcast could mean swapping out
forest, for example - portrayed in an transfer function (EOTF), sometimes encoders, decoders, and set-top boxes.
8-bit colour environment can lead to called perceptual quality (PQ). EOTF
In a dual-layer approach, standard
distinct stepping artefacts,
definition range (SDR) and
where the colour splits into
HDR video streams are
visible bands. 10-bit colour
carried separately through
makes the difference between
workflows, and the receiving
adjacent shades much finer,
device selects which stream
reducing intrusive banding.
to
accommodate.
This
More colours leads to a
adds complexity, increases
perceived improvement in
required bandwidth, and
image quality. This is because
raises challenges for internal
there is a finer, more sharply
workflows, especially when
delineated difference between
splicing SDR commercials
each colour, even in subtle
into an HDR programme, or
Rec. 2020 offers expanded colour space for HDR video

Standard dynamic range vs. high dynamic range

inserting emergency broadcast signal
messages.
In a single-layer approach, the
architecture carries the SDR signal,
plus additional metadata telling HDRequipped devices how to extend the
dynamic range. This provides full
backwards compatibility - non-HDR
devices will not understand, and
therefore ignore additional metadata.
Introducing additional processing may
limit the benefits of extending the
dynamic range.
Encoder designs need to ensure that
HDR can be achieved in real time, as
live sport is a big HDR driver. It should
also not impose too much latency.
Software
Competing
proprietary
HDR
solutions are on the market, and
standards bodies are racing to keep
pace. Content owners could be asked
to deliver HDR content in different
formats for different distribution
platforms,
making
workflows
more cumbersome, and increasing
processing and storage costs.
Elemental
provides
softwaredefined
video
solutions
for
HDR
implementation,
allowing
broadcasters, service providers, and
content owners to create, manage,
and deliver HDR content. Most
importantly, this can be done without
forcing expensive decisions and the
outlay of substantial capital for video
infrastructure, and does not require
the maintenance of parallel hardware
HDR silos. Elemental features a
scalable, flexible approach to futureproof video workflows kept current
through software updates.
This solution aligns with the
trend
towards
software-defined
architectures, and prepares companies
to take advantage of virtualisation
and the cloud. It reduces both
CAPEX and OPEX, minimising risk
for organisations as they transition.
Elemental's flexible and scalable
software allows organisations to
embrace HDR quickly, lead the market,
and meet the expectations of their
audiences.
To see further information about
Elemental's software, please visit
www.elementaltechnologies.com


http://www.inbroadcast.com http://www.elementaltechnologies.com

Table of Contents for the Digital Edition of In Broadcast - CABSAT 2016

In Broadcast - CABSAT 2016 - Intro
In Broadcast - CABSAT 2016 - Cover1
In Broadcast - CABSAT 2016 - Cover2
In Broadcast - CABSAT 2016 - 3
In Broadcast - CABSAT 2016 - 4
In Broadcast - CABSAT 2016 - 5
In Broadcast - CABSAT 2016 - 6
In Broadcast - CABSAT 2016 - 7
In Broadcast - CABSAT 2016 - 8
In Broadcast - CABSAT 2016 - 9
In Broadcast - CABSAT 2016 - 10
In Broadcast - CABSAT 2016 - 11
In Broadcast - CABSAT 2016 - 12
In Broadcast - CABSAT 2016 - 13
In Broadcast - CABSAT 2016 - 14
In Broadcast - CABSAT 2016 - 15
In Broadcast - CABSAT 2016 - 16
In Broadcast - CABSAT 2016 - 17
In Broadcast - CABSAT 2016 - 18
In Broadcast - CABSAT 2016 - 19
In Broadcast - CABSAT 2016 - 20
In Broadcast - CABSAT 2016 - 21
In Broadcast - CABSAT 2016 - 22
In Broadcast - CABSAT 2016 - 23
In Broadcast - CABSAT 2016 - 24
In Broadcast - CABSAT 2016 - 25
In Broadcast - CABSAT 2016 - 26
In Broadcast - CABSAT 2016 - 27
In Broadcast - CABSAT 2016 - 28
In Broadcast - CABSAT 2016 - 29
In Broadcast - CABSAT 2016 - 30
In Broadcast - CABSAT 2016 - 31
In Broadcast - CABSAT 2016 - 32
In Broadcast - CABSAT 2016 - 33
In Broadcast - CABSAT 2016 - 34
In Broadcast - CABSAT 2016 - 35
In Broadcast - CABSAT 2016 - 36
In Broadcast - CABSAT 2016 - 37
In Broadcast - CABSAT 2016 - 38
In Broadcast - CABSAT 2016 - 39
In Broadcast - CABSAT 2016 - 40
In Broadcast - CABSAT 2016 - 41
In Broadcast - CABSAT 2016 - 42
In Broadcast - CABSAT 2016 - 43
In Broadcast - CABSAT 2016 - 44
In Broadcast - CABSAT 2016 - 45
In Broadcast - CABSAT 2016 - 46
In Broadcast - CABSAT 2016 - 47
In Broadcast - CABSAT 2016 - 48
In Broadcast - CABSAT 2016 - 49
In Broadcast - CABSAT 2016 - 50
In Broadcast - CABSAT 2016 - 51
In Broadcast - CABSAT 2016 - 52
In Broadcast - CABSAT 2016 - 53
In Broadcast - CABSAT 2016 - 54
In Broadcast - CABSAT 2016 - 55
In Broadcast - CABSAT 2016 - 56
In Broadcast - CABSAT 2016 - 57
In Broadcast - CABSAT 2016 - 58
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In Broadcast - CABSAT 2016 - 60
In Broadcast - CABSAT 2016 - 61
In Broadcast - CABSAT 2016 - 62
In Broadcast - CABSAT 2016 - 63
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In Broadcast - CABSAT 2016 - 69
In Broadcast - CABSAT 2016 - 70
In Broadcast - CABSAT 2016 - 71
In Broadcast - CABSAT 2016 - 72
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In Broadcast - CABSAT 2016 - 74
In Broadcast - CABSAT 2016 - 75
In Broadcast - CABSAT 2016 - 76
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