Essential Guide: IP for Mobile Production
November 3rd 2016 - 05:00 PM
Once logged in you can set content preferences to let us know what you are interested in and whether you want to receive email from us.
Already Registered? Login
Arena TV's mobile uses an all-IP infrastructure, the first AIMS truck?
IP networks have been at the heart of many broadcast operations for two decades and more. Editing uses commodity workstations and IP networks, as do playout operations. But live production has, until recently, been the preserve of SDI. The advances in IT, driven by the data centers that power the cloud, and the general move to virtualization, brings benefits that now make live, real-time broadcast operations possible in an all-IP environment. There is gathering momentum to consider IP-connected broadcast equipment instead of the tried and tested SDI, which has served the industry well since the introduction of digital video.
The outside broadcast vehicle is an ideal place to start with IP operations. For one, they are a manageable scale when compared with the rebuild of an entire broadcasting center.
Live UHD broadcasts are already a reality for some OTT providers. Over-the-air broadcast will follow, once all the transmission issues have been resolved. Mobile operators are at the vanguard of UHD coverage, with sports being the driver.
All-IP systems
Moving to all-IP radically changes the landscape. IP switches are a fraction of the size of SDI routers. The number of interconnecting cables is reduced. One 10G Ethernet connection can carry three 3G-SDI circuits, HD or compressed UHD. Multi-channel audio, communications and control can share Ethernet connections, simplifying connections to remote commentary boxes and the like.
Moving from SDI to IP offers an alternative which decouples the intimate connection between coding systems and the electrical interface that we have with SDI standards.
IP connections are duplex (bidirectional). Stage boxes can use a single Ethernet fiber to carry the inputs and outputs. The physical layer carrying the IP data is generally Ethernet. This can be twisted cable pairs, or fiber for higher data rates (10Gb and more) and long cable runs.
Ideally, the move to IP should lower costs, provide same facilities as SDI systems, and offer new possibilities.
Advantages for mobile
An IP infrastructure brings a scalability and flexibility to a truck that is not possible with an SDI system. Scale means IP can be used to build a large 32-camera truck.
Flexibility means a truck can be used for an HD production one day, and UHD the next without the need for time-consuming reconfiguration. For mobile operators, reconfiguration time is down time.
Format and standards upgrades can be made through software changes rather than re-cabling. As standards evolve, the operator can move from embedded audio to elemental streams without major hardware changes.
IP is On-air
IP trucks are on-air now, they are field-proven and being used to cover prestigious sporting events, where gear failure is not an option. IP infrastructure has been demonstrated to be a lighter weight, especially when compared with a quad-link UHD system. The commodity Ethernet switches and routers are designed for the high performance demands of today’s enterprise data centers. The scale of manufacture, and the pace of change means 40Gb and 100Gb equipment is becoming more affordable, with 10Gb being a step on the road.
IP in broadcast is no longer a science experiment. It offers real advantages, without necessitating changes to the operators’ familiar facilities and control surfaces.
You might also like...
Future Technologies: Timing Asynchronous Infrastructures
We continue our series considering technologies of the near future and how they might transform how we think about broadcast, with a technical discussion of why future IP infrastructures may well take a more fluid approach to timing planes.
Standards: Part 13 - Exploring MPEG4-Part 10 - H.264/AVC
The H.264/AVC codec has been very successful. Here we dig deeper into how profiles and levels work to facilitate deployment of delivery systems and receiving client-player designs.
The Meaning Of Metadata
Metadata is increasingly used to automate media management, from creation and acquisition to increasingly granular delivery channels and everything in-between. There’s nothing much new about metadata—it predated digital media by decades—but it is poised to become pivotal in …
Designing IP Broadcast Systems: Remote Control
Why mixing video and audio UDP/IP streams alongside time sensitive TCP/IP flows can cause many challenges for remote control applications such as a camera OCP, as the switches may be configured to prioritize the UDP feeds, or vice…
Future Technologies: Autoscaling Infrastructures
We continue our series considering technologies of the near future and how they might transform how we think about broadcast, with a discussion of the concepts, possibilities and constraints of autoscaling IP based infrastructures.