Staying within a recognisable landscape


Alan Wheable TV-Bay Magazine
Read ezine online
by Alan Wheable
Issue 110 - February 2016

2015 saw the maturing development of UHDTV 4K signal technologies and a growing agreement that both SDI and IP will exist in their respective strong application areas, as a solid engineering solution to the differing requirements of live signal handling and programme contribution. While the apparent panacea of one signal format appears attractive, the dependency of the live production sector on long-developed and keep-it-simple SDI infrastructure has made the extension of this technology into 4K and beyond a natural way to respond to viewers interest in high resolution and their take up of 4K TVs.

While the IP landscape has yet to emerge from the mist, the adoption of 12G-SDI by a large number of manufacturers world-wide, has shown a strong desire to stay within a landscape that is recognisable.

Fears and myths about 12G-SDI are being dispelled by industry leaders as they cut their teeth on this new technology and there is a broadening industry realisation that 75 Ohm cable is a dependable and rugged engineering solution for many 4K signal connections.

With a large number of manufacturers adopting 12G-SDI as a viable way forwards, and more and more 12G-SDI equipment coming on the market, the need for a confident understanding of this new high speed SDI technology is becoming important for those embracing it.

Some of the new challenges that are being overcome in the world of 12G-SDI are similar to those encountered when the industry moved to HD-SDI and 3G-SDI. These challenges, as with those of previous moves in technology require industry understanding and the tools to understand what the new norm is.

Looking at the Eye Pattern of a 12G-SDI signal you will notice that, compared to HD-SDI or 3G-SDI, the waveform is basically a sine wave. Signal amplitude, rise time and fall time still have the same importance as before, but now the challenge is to see the Eye through the increased level of permitted jitter. T&M equipment that provides automatic measurement and a jitter-free Eye is essential here to be able to see the actual quality of the signal being generated. At this early stage of 12G-SDI development the most significant factor determining Eye quality is the current generation of driver chips.

A significant advantage of having a jitter-free Eye Pattern display is that when the actual Eye closes it is due to the frequency response of the generating equipments output circuitry and the connecting cable to the measuring device. On a jittering display this cannot be seen.

Jitter has always been present on SDI signals, due to the encoding method employed, but its effect has only be apparent in worst case scenarios such as low signal amplitudes caused by long unequalised cable runs, the use on non-re-clocking devices and intolerant receiving equipment. With 6G-SDI and 12G-SDI the permissible level of jitter has increased dramatically, but to counter this the current generation of receiver chips are highly tolerant to even greater levels of jitter. By its nature Jitter is random, so to ensure that the level of jitter introduced by generating is within SMPTE limits, it needs to be checked to ensure that there are no surprises when live video is used.

When 6G-SDI and 12G-SDI technologies started to appear on the market there were concerns about the use of short cable lengths required to wire up equipment. Many organisations have already over-come this predicted limitation by converting between single 12G-SDI copper to quad 3G copper or fibre as necessary to suit their infrastructures. The conversion process can be challenging to get right, due to the complexities of the different SMPTE standards, but as long as factors such as Square Division to 2 Sample Interleave conversions, link timing and audio routing are checked all is well in the world.

The remaining challenge for anyone embracing 4K / UHDTV and 12G-SDI, 6G-SDI, Quad Link 3G-SDI interface technology is finding the most appropriate 75 Ohm broadcast test and measurement equipment. For those with deep pockets, high end Real Time oscilloscopes are available. These, however, are typically 50 Ohm, non-broadcast-centric, complicated to use and do not necessarily provide the portability and durability required in most broadcast environments.

The Omnitek Ultra 4K Tool Box provides a practical and useable tool set available for anyone working with 4K / UHD and using 12GSDI, 6G-SDI, 3G-SDI, DisplayPort or HDMI interfaces. It provides consistent and reliable results using dedicated instruments directly applicable to broadcast equipment manufacturers, installers and testers.


Tags: iss110 | omnitek | uhdtv | 4k | 12g-sdi | eyepattern | Alan Wheable
Contributing Author Alan Wheable

Read this article in the tv-bay digital magazine
Article Copyright tv-bay limited. All trademarks recognised.
Reproduction of the content strictly prohibited without written consent.

Related Interviews
  • Omnitek Updates for Ultra 4k Toolbox at NAB 2018

    Omnitek Updates for Ultra 4k Toolbox at NAB 2018

  • Omnitek Ultra 4K Tool Box at IBC 2015

    Omnitek Ultra 4K Tool Box at IBC 2015

  • Omnitek Ultra TQ at IBC 2017

    Omnitek Ultra TQ at IBC 2017

  • Omnitek Consultancy and Design Services at IBC 2017

    Omnitek Consultancy and Design Services at IBC 2017

  • Omnitek at IBC 2016

    Omnitek at IBC 2016

  • Omnitek at NAB 2016

    Omnitek at NAB 2016

  • Omnitek at BVE 2016

    Omnitek at BVE 2016

  • Ateme at IBC 2014

    Ateme at IBC 2014

  • Matrox Unveils Monarch EDGE 4K Contribution Encoder at IBC 2018

    Matrox Unveils Monarch EDGE 4K Contribution Encoder at IBC 2018

  • 12G 4K microMUSA Jackfield and Fibre Termination Solutions from Canford at IBC 2018

    12G 4K microMUSA Jackfield and Fibre Termination Solutions from Canford at IBC 2018

  • Blackmagic Design Pocket Cinema Camera BMPCC 4K at IBC 2018

    Blackmagic Design Pocket Cinema Camera BMPCC 4K at IBC 2018

  • Apantac 4k UHD HDMI/DVI Multiviewer with KVM at IBC 2018

    Apantac 4k UHD HDMI/DVI Multiviewer with KVM at IBC 2018

  • JVC 4K Connected Camera GY-HC550 and 500 at IBC 2018

    JVC 4K Connected Camera GY-HC550 and 500 at IBC 2018

  • IMT Vislink HCAM 4k UHD transmitter at IBC 2018

    IMT Vislink HCAM 4k UHD transmitter at IBC 2018

  • Blackmagic Pocket Cinema Camera 4K at NAB 2018

    Blackmagic Pocket Cinema Camera 4K at NAB 2018

  • Blackmagic ATEM Television Studio Pro 4K at NAB 2018

    Blackmagic ATEM Television Studio Pro 4K at NAB 2018

  • 4K UHD Multi-viewer HDMI 2.0 from Apantac at NAB 2018

    4K UHD Multi-viewer HDMI 2.0 from Apantac at NAB 2018

  • 4k and HEVC with Garland at BVE 2018

    4k and HEVC with Garland at BVE 2018

  • 6K Sony Venice and Sony 4k Palm Camcorders at IBC 2017

    6K Sony Venice and Sony 4k Palm Camcorders at IBC 2017

  • JVC 4K UHD Monitors at IBC 2017

    JVC 4K UHD Monitors at IBC 2017

  • The CFU5 4k Transmitter from Vislink at IBC 2017

    The CFU5 4k Transmitter from Vislink at IBC 2017

  • Wireless 4K Transmitter from DTC Domo Broadcast at IBC 2017

    Wireless 4K Transmitter from DTC Domo Broadcast at IBC 2017

  • AJA Thunderbolt 3 IO 4k Plus at IBC 2017

    AJA Thunderbolt 3 IO 4k Plus at IBC 2017

  • HDR, 12G, 4k, IP - the range expands from Phabrix at NAB 2017

    HDR, 12G, 4k, IP - the range expands from Phabrix at NAB 2017

  • Quad 4k Capture and Stream with Maevex from Matrox at NAB 2017

    Quad 4k Capture and Stream with Maevex from Matrox at NAB 2017

  • 4k 60 Matrix from GDSYS at NAB 2017

    4k 60 Matrix from GDSYS at NAB 2017

  • HEVC 4k Encoding from Aviwest at NAB 2017

    HEVC 4k Encoding from Aviwest at NAB 2017

  • Apantac 4k live demo at NAB 2016

    Apantac 4k live demo at NAB 2016

  • Snell Advanced Media (SAM) 4k workflow at IBC 2015

    Snell Advanced Media (SAM) 4k workflow at IBC 2015

  • MULTIDYNE Silverback 4k at NAB 2015

    MULTIDYNE Silverback 4k at NAB 2015

  • Atomos talking 4K on BroadcastShow LIVE at IBC 2013

    Atomos talking 4K on BroadcastShow LIVE at IBC 2013

  • Panasonic Lumix GH5 at BVE 2017

    Panasonic Lumix GH5 at BVE 2017

  • Garland at BVE 2017

    Garland at BVE 2017

  • Ikegami 8k camera at IBC 2016

    Ikegami 8k camera at IBC 2016

  • Ikegami HQLM-3120W monitor at IBC 2016

    Ikegami HQLM-3120W monitor at IBC 2016

  • Ikegami UHK-430 camera at IBC 2016

    Ikegami UHK-430 camera at IBC 2016

  • Video Devices PIX-E at IBC 2016

    Video Devices PIX-E at IBC 2016

  • Sound Devices Wingman app at IBC 2016

    Sound Devices Wingman app at IBC 2016

  • JVC GY-LS300 at IBC 2015

    JVC GY-LS300 at IBC 2015

  • AVIWEST at IBC 2015

    AVIWEST at IBC 2015

  • BBright at IBC 2015

    BBright at IBC 2015

  • Thomson Video Networks at IBC 2015

    Thomson Video Networks at IBC 2015

  • Lynx Technik at IBC 2015

    Lynx Technik at IBC 2015

  • JVC at BVE 2015

    JVC at BVE 2015

  • Grass Valley at BVE 2015

    Grass Valley at BVE 2015

  • Gearhouse Broadcast at BVE 2015

    Gearhouse Broadcast at BVE 2015

  • KITPLUS rig setup at IBC 2014

    KITPLUS rig setup at IBC 2014

  • Tektronix at IBC 2014

    Tektronix at IBC 2014

  • Cooke Optics technology at IBC 2014

    Cooke Optics technology at IBC 2014

  • Cooke Optics talk anamorphic at IBC 2014

    Cooke Optics talk anamorphic at IBC 2014

  • JVC GY-LS300 prototype at IBC 2014

    JVC GY-LS300 prototype at IBC 2014

  • MultiDyne SilverBACK at IBC 2014

    MultiDyne SilverBACK at IBC 2014

  • BBright at IBC 2014

    BBright at IBC 2014

  • Hitachi at IBC 2014

    Hitachi at IBC 2014

  • Guntermann and Drunck DP-HR range at IBC 2014

    Guntermann and Drunck DP-HR range at IBC 2014

  • Quantel LiveTouch at IBC 2014

    Quantel LiveTouch at IBC 2014

  • Quantel deal with AFP at IBC 2014

    Quantel deal with AFP at IBC 2014

  • Snell Kahuna Production Switcher at IBC 2014

    Snell Kahuna Production Switcher at IBC 2014

  • Matrox Monarch HD at NAB 2014

    Matrox Monarch HD at NAB 2014

  • Elemental Technologies Software-Defined Video at NAB 2014

    Elemental Technologies Software-Defined Video at NAB 2014

  • Elemental Technologies HEVC solutions at NAB 2014

    Elemental Technologies HEVC solutions at NAB 2014

  • Elemental Technologies Multiscreen Solutions at NAB 2014

    Elemental Technologies Multiscreen Solutions at NAB 2014

  • Guntermann and Drunck at NAB 2014

    Guntermann and Drunck at NAB 2014

  • Matrox Mojito at NAB 2014

    Matrox Mojito at NAB 2014

  • Matrox Capture Card at NAB 2014

    Matrox Capture Card at NAB 2014

  • Blackmagic URSA at NAB 2014

    Blackmagic URSA at NAB 2014

  • Blackmagic Studio Camera at NAB 2014

    Blackmagic Studio Camera at NAB 2014

  • Cintel Film Scanner: Blackmagic Design at NAB 2014

    Cintel Film Scanner: Blackmagic Design at NAB 2014

  • Guntermann and Drunck at BVE 2014

    Guntermann and Drunck at BVE 2014

  • Philip Bloom on Tour in Belfast

    Philip Bloom on Tour in Belfast

  • Cinegy on BroadcastShow LIVE at IBC 2013

    Cinegy on BroadcastShow LIVE at IBC 2013

  • Blackmagic Design on BroadcastShow LIVE at IBC 2013

    Blackmagic Design on BroadcastShow LIVE at IBC 2013

  • Miranda on BroadcastShow LIVE at IBC 2013

    Miranda on BroadcastShow LIVE at IBC 2013

  • Snell on BroadcastShow LIVE at IBC 2013

    Snell on BroadcastShow LIVE at IBC 2013

  • Harmonics Tom Lattie on BroadcastShow LIVE at IBC 2013

    Harmonics Tom Lattie on BroadcastShow LIVE at IBC 2013

  • JVC GY-HM600 series camera updates at IBC 2013

    JVC GY-HM600 series camera updates at IBC 2013

  • ATEME at IBC 2013

    ATEME at IBC 2013

  • Multidyne SilverBack, BullDog and Spider at IBC 2013

    Multidyne SilverBack, BullDog and Spider at IBC 2013

  • Cinegy at IBC 2013

    Cinegy at IBC 2013

  • Facilis at IBC 2013

    Facilis at IBC 2013

  • Blackmagic Design with the new ATEM Production Suite at IBC 2013

    Blackmagic Design with the new ATEM Production Suite at IBC 2013

  • MultiDyne: SilverBACK at NAB 2013

    MultiDyne: SilverBACK at NAB 2013

  • Quantel Pablo Rio at NAB 2013

    Quantel Pablo Rio at NAB 2013

  • Blackmagic Design: Products at NAB 2013

    Blackmagic Design: Products at NAB 2013

  • Facilis at NAB 2013

    Facilis at NAB 2013

  • AJA at BVE 2013

    AJA at BVE 2013

  • JVC at BVE 2012

    JVC at BVE 2012

  • QX Hybrid 2110/12G-SDI UHD Rasterizer from Phabrix at IBC 2018

    QX Hybrid 2110/12G-SDI UHD Rasterizer from Phabrix at IBC 2018


Related Shows
  • Philip Bloom chats 4k: BVE Day 2

    Philip Bloom chats 4k: BVE Day 2


Articles
Creating Authentic Content That Counts
Frank le Mair We’re deep into the 2010’s and the way in which we consume content has changed forever. Broadcasters and content owners are fighting for eyeballs in a saturated market where consumers are watching their favourite shows on different devices across a number of platforms. To target millennials and younger generations, who generally consume short bursts of video on YouTube and social media - particularly Snapchat, Instagram and now IGTV - media companies are creating more and more authentic stories and are using platforms that are compelling for this demographic. Unlike generations before them, they have totally new video viewing patterns and ideals.
Tags: iss133 | insight tv | monster energy | amazon | millennial | Frank le Mair
Contributing Author Frank le Mair Click to read or download PDF
Managing Technological Change
Alan Wheable Continual technological change in the broadcast and media industries can make it difficult to plan for the mid to long term. Typically, broadcasters and media organisation are still implementing the last set of changes to working practices when the next changes come along.
Tags: iss133 | omnitek | ip | waveform | vectorscope | ultra tq | Alan Wheable
Contributing Author Alan Wheable Click to read or download PDF
Smashing the WTA Tour
Danny Ridler The Women’s Tennis Association (WTA) is the global leader in women’s professional sport with more than 2500 players representing nearly 100 nations competing for a record $146 million in prize money. The 2018 WTA competitive season includes 54 events and four Grand Slams in 30 countries. In 2017, the WTA was watched around the world by a total TV audience of 500 million – with host broadcast services provided by NEP UK.
Tags: iss133 | tennis | wta | nep | outside broadcast | ob | Danny Ridler
Contributing Author Danny Ridler Click to read or download PDF
Perimeter LED screens management
Nicolas Houel Opened in January 2016, Parc Olympique Lyonnais, also known as Groupama Stadium, is the new home of Olympique Lyonnais football club, one of the most popular clubs in France. Since its inauguration, the stadium was a host of UEFA Euro 2016, and was also chosen to stage, among other important events, the 2018 UEFA Europa League Final and football at the 2024 Summer Olympics.
Tags: iss133 | 3dstorm | graphics | groupama stadium | liveexpert | livecg | deltacast | Nicolas Houel
Contributing Author Nicolas Houel Click to read or download PDF
Fast-moving productions need multi-cam RF reliability
Darren Bilton Wireless acquisition creates a level of freedom not possible with any other form of filming yet only a decade ago the technique was barely possible. The technology enabling live real-time connections over radio frequencies has advanced leaps and bounds such that there is barely an entertainment, documentary, sports or news format today that doesn’t benefit from at least one link system. That means the demands on the kit continues to rise and includes the need for fail safe multi-camera operation, ease of use and backwards compatibility all within a small, lightweight and budget-friendly package.
Tags: iss133 | boxx tv | wireless | mpeg-4 | multicam | rf | multi-cam | Darren Bilton
Contributing Author Darren Bilton Click to read or download PDF