In Broadcast - December 2011/January 2012 - 82

InFILE
Crushing Need For A Massive Squeeze
By Kieron Seth
Experimental it may be but NHK’s Ultra High Definition Television (UHDTV) at a frame size of 7,680_4,320 has an amazing 16 times the resolution of HDTV. The UHDTV uncompressed signal weighs in at a massive 24 Gbits/s – the audio alone amounting to 28Mbit/s for the possible accompanying 24 channels of audio. As for post, NHK’s editing system consists of four editing servers with 16 video inputs, all controlled by high power central workstation. Storing, editing, distributing and delivering such enormous files is clearly a gargantuan task and one that is technically and financially within the reach of very few broadcasters. However, mainstream IT technologies are now available that can actually begin to commoditise elements of the UHDTV workflow. In theory a 100 Gbit Ethernet could transport UHDTV files over a network. Back in the real world, many broadcasters with an eye to futureproofing their infrastructure are currently upgrading their HD-SDI 1.485 Gbit/s systems and routers to 3G-SDI technology – equipment that should sustain the transition to 1080p, stereoscopic production and digital cinema programming. Even the state-of-the-art Media City is underpinned by ‘only’ a 10 Gbit infrastructure. This kind of communications network is typical of many modern media centres and realistically delivers cutting edge levels of speed. Importantly it brings bandwidth headroom that is more than adequate for traffic between content creators collaborating on compressed and uncompressed HD projects.
Kieron Seth

Uncompressed Wizardry

So if today’s networks, storage systems, routers, and editing systems can handle multiple HD project data rates, why is there an obsession with compressing signals to squeeze media into smaller packages? Why, when an uncompressed video recorder such as the BlackMagic HyperDeck series is available at – let’s face it – high street prices, is media encoding near the top of every broadcaster’s agenda?

compressed to 40 Mbit/s, will look exquisite on domestic HDTV – heavily compressed images do not have to be unimpressive. The practicalities for broadcast organisations mean that dramatic reductions in file sizes and data rates reap huge dividends in terms of storage and archive costs. While camera codecs, such as AVC-Intra reduce file sizes, and storage is following its own version of Moore’s Law, it will be some years before the commonly available storage media could hold the terabytes of data an uncompressed 8K or even 4K camera would create. Transmission infrastructures

Because of this, online channels such as BBC’s iPlayer is capped at 1,500Kb/s; even Virgin Media’s HD channels, running over its own cable network, transmit at only 1617 Mbs.

Tight Fit

There is a wealth of options for technicians encoding content for scheduled TV playout or ondemand internet viewing. Root6’s ContentAgent forms part of a non-linear workflow to provide automated transcoding between formats including MPEG, MPEG2, H.264, Avid DNxHD, DVCPRO, WM9, VC1 and RED R3D. Files can

82

BlackMagic HyperDeck Studio

Starting at the top – UHDTV, 8K and 4K – the image exceeds the resolving capabilities of the human eye. Putting issues of data to one side, compressing an UHDTV to 300Mbit/s results in a picture that arguably maintains colour fidelity, contrast and resolution. It also means that certain satellites and IP networks can already deliver compressed super hi-vision. Moving down the HD chain, a Bluray picture, though

across the world – DVB and IP – are wholly unsuited to anything but compressed media delivery. Even the world’s fastest broadband highway in South Korea can manage an average download speed nationwide of 2.2Mb/s.

b e processed quickly for archive, Blu-ray production, web video, broadcast transmission or anything else the producer may require. Indeed, its power is such that it claims real-time live rendering to multiple formats in parallel, while performing pre-processing such as deinterlacing, cropping and noise reduction.

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In Broadcast - December 2011/January 2012

Table of Contents for the Digital Edition of In Broadcast - December 2011/January 2012

In Broadcast - December 2011/January 2012
Content
Immortal Images: Nuoda & Film Factory
Film Tails Out
IABM Report Revieals New Insights
Masstech Emerald 7.5 LE Preserves Vital Assets
Sneak Peek
Robotics in the Newsroom
Sislive America's World Cup
Expo World Travel Comments on Services
Transcoding: Getting There Faster
In Broadcast - December 2011/January 2012 - In Broadcast - December 2011/January 2012
In Broadcast - December 2011/January 2012 - 2
In Broadcast - December 2011/January 2012 - Content
In Broadcast - December 2011/January 2012 - Immortal Images: Nuoda & Film Factory
In Broadcast - December 2011/January 2012 - 5
In Broadcast - December 2011/January 2012 - 6
In Broadcast - December 2011/January 2012 - 7
In Broadcast - December 2011/January 2012 - 8
In Broadcast - December 2011/January 2012 - 9
In Broadcast - December 2011/January 2012 - 10
In Broadcast - December 2011/January 2012 - 11
In Broadcast - December 2011/January 2012 - 12
In Broadcast - December 2011/January 2012 - 13
In Broadcast - December 2011/January 2012 - 14
In Broadcast - December 2011/January 2012 - 15
In Broadcast - December 2011/January 2012 - 16
In Broadcast - December 2011/January 2012 - 17
In Broadcast - December 2011/January 2012 - 18
In Broadcast - December 2011/January 2012 - 19
In Broadcast - December 2011/January 2012 - Film Tails Out
In Broadcast - December 2011/January 2012 - IABM Report Revieals New Insights
In Broadcast - December 2011/January 2012 - 22
In Broadcast - December 2011/January 2012 - 23
In Broadcast - December 2011/January 2012 - 24
In Broadcast - December 2011/January 2012 - 25
In Broadcast - December 2011/January 2012 - 26
In Broadcast - December 2011/January 2012 - Masstech Emerald 7.5 LE Preserves Vital Assets
In Broadcast - December 2011/January 2012 - Sneak Peek
In Broadcast - December 2011/January 2012 - 29
In Broadcast - December 2011/January 2012 - 30
In Broadcast - December 2011/January 2012 - 31
In Broadcast - December 2011/January 2012 - 32
In Broadcast - December 2011/January 2012 - 33
In Broadcast - December 2011/January 2012 - 34
In Broadcast - December 2011/January 2012 - 35
In Broadcast - December 2011/January 2012 - 36
In Broadcast - December 2011/January 2012 - 37
In Broadcast - December 2011/January 2012 - 38
In Broadcast - December 2011/January 2012 - 39
In Broadcast - December 2011/January 2012 - 40
In Broadcast - December 2011/January 2012 - 41
In Broadcast - December 2011/January 2012 - 42
In Broadcast - December 2011/January 2012 - 43
In Broadcast - December 2011/January 2012 - 44
In Broadcast - December 2011/January 2012 - 45
In Broadcast - December 2011/January 2012 - 46
In Broadcast - December 2011/January 2012 - 47
In Broadcast - December 2011/January 2012 - 48
In Broadcast - December 2011/January 2012 - 49
In Broadcast - December 2011/January 2012 - 50
In Broadcast - December 2011/January 2012 - 51
In Broadcast - December 2011/January 2012 - 52
In Broadcast - December 2011/January 2012 - 53
In Broadcast - December 2011/January 2012 - 54
In Broadcast - December 2011/January 2012 - Robotics in the Newsroom
In Broadcast - December 2011/January 2012 - 56
In Broadcast - December 2011/January 2012 - 57
In Broadcast - December 2011/January 2012 - 58
In Broadcast - December 2011/January 2012 - 59
In Broadcast - December 2011/January 2012 - 60
In Broadcast - December 2011/January 2012 - 61
In Broadcast - December 2011/January 2012 - 62
In Broadcast - December 2011/January 2012 - 63
In Broadcast - December 2011/January 2012 - 64
In Broadcast - December 2011/January 2012 - 65
In Broadcast - December 2011/January 2012 - 66
In Broadcast - December 2011/January 2012 - 67
In Broadcast - December 2011/January 2012 - Sislive America's World Cup
In Broadcast - December 2011/January 2012 - 69
In Broadcast - December 2011/January 2012 - 70
In Broadcast - December 2011/January 2012 - 71
In Broadcast - December 2011/January 2012 - 72
In Broadcast - December 2011/January 2012 - 73
In Broadcast - December 2011/January 2012 - Expo World Travel Comments on Services
In Broadcast - December 2011/January 2012 - 75
In Broadcast - December 2011/January 2012 - 76
In Broadcast - December 2011/January 2012 - 77
In Broadcast - December 2011/January 2012 - 78
In Broadcast - December 2011/January 2012 - 79
In Broadcast - December 2011/January 2012 - 80
In Broadcast - December 2011/January 2012 - 81
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In Broadcast - December 2011/January 2012 - 85
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In Broadcast - December 2011/January 2012 - 87
In Broadcast - December 2011/January 2012 - 88
In Broadcast - December 2011/January 2012 - 89
In Broadcast - December 2011/January 2012 - 90
In Broadcast - December 2011/January 2012 - 91
In Broadcast - December 2011/January 2012 - Transcoding: Getting There Faster
In Broadcast - December 2011/January 2012 - 93
In Broadcast - December 2011/January 2012 - 94
In Broadcast - December 2011/January 2012 - 95
In Broadcast - December 2011/January 2012 - 96
In Broadcast - December 2011/January 2012 - 97
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