ST 2110

Video: Transporting ST 2110 Over WAN

Posted on by Russell Trafford-Jones

Is SMPTE ST 2110 suitable for inter-site connectivity over the WAN? As ST 2110 continues to mature and the first facilities are going live bringing 2110 into daily use, there are a number of challenges still to be overcome and moving a large number of essence flows long distances and between PTP time domains is one of them.

Nevion’s Andy Rayner presents the work the VSF is doing to recommend transport of ST 2110 over WAN outlining where they have got to and what has been recommended to date.

The talk starts with SMPTE 2022-7 seamless protection which is recommended for dealing with path breaks. For compensating for transmission errors, FEC is recommended and Andy explains the parameters needed.

Key to the inter-site transport is trunking whereby the individual essences are mixed down to one flow. This has a number of advantages: Reducing the number of flows makes life simpler for service providers, all essences will now share the same signal path from site to site and it FEC protection can be more efficiently applied.

The trunks are made using GRE – Generic Routing Encapsulation – which is a pre-existing IT standard for grouping lots of traffic into a single tunnel whilst preserving the data inside. This then appears at the other end of the trunk with the same IP information as if nothing had happened. Andy looks at the extra encapsulation headers needed to make this work and goes on to discuss payload lengths as we need to keep them short so as not to result in fragmented packets.

Timing, as ever, is important meaning that the recommendation is to align all essences before sending them in to the trunk, though Andy looks at alternatives. Also of key concern is compression as there will be times when uncompressed video is simply too high a bandwidth to be carried on the WAN. JPEG 2000 and, now, JPEG XS are available for this task.

Andy covers timing, discovery, control, security and conversion to and from 2022-6 before finishing the talk by taking questions.

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Speaker

Andy Rayner Andy Rayner
Chief Technologist,
Nevion

Video: ST 2110-30 and NMOS IS-08 — Audio Transport and Routing

Posted on by Russell Trafford-Jones

Andreas Hildebrand starts by introducing 2110 and how it works in terms of sending the essences separately using multicast IP. This talk focusses on the ability of audio-only devices to subscribe to the audio streams without needing the video streams. Andreas then goes on to introduce AES67 which is a standard defining interoperability for audio defining timing, session description, encoding, QOS, transport and much more. Of all the things which are defined in AES67, discovery was deliberately not included and Andreas explains why.

Within SMPTE 2110, there are constraints added to AES67 under the sub-standard 2110-30. The different categories A, B and C (and their X counterparts) are explained in terms how how many audios are defined and the sample lengths with their implications detailed.

As for discovery and other aspects of creating a working system, Andreas looks towards AMWA’s NMOS suite summarising the specifications for Discovery & Registration, Connection Management, Network Control, Event & Tally, Audio Channel Mapping. It’s the latter which is the focus of the last part of this talk.

IS-08 defines a way of defining input and output blocks allowing a channel mapping to be defined. Using IS-05, we can determine which source stream should connect to which destination device. Then IS-08 gives the capability to determine which of the audios within this stream can be mapped to the output(s) of the receiving device and on top of this allows mapping from multiple received streams into the output(s) of one device. The talk then finishes with a deeper look at this process including where example code can be found.

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Speaker

Andreas Hildebrand Andreas Hildebrand
Senior Product Manager,
ALC NetworX

Video: All IP Success Stories Real World Deployments

Posted on by Russell Trafford-Jones

When SDI came in to replace analogue video, there were difficulties and setbacks yet now it’s very well trusted and ubiquitous. Similarly, life is not simple moving from SDI into IP, either 2022-6 or 2110, let alone PTP which replaces black nad burst.

In this talk we hear from people who have made that change and are working with IP. We find out what went well, whether things are up and running yet and also what the challenges and lessons learnt are.

Speakers

Mike Wilken Mike Wilken
SVP of Systems and Technology,
FOX Sports
Francois Legrand Francois Legrand
Senior Project Mangaer,
CBC/Radio Canada
Daniel Murphy Daniel Murphy
NEP

Video: ST 2110 Based OB Production Solution

Posted on by Adam K

This case study focuses on NEP UK’s ST 2110 based OB solution (Broadcast Centre and two IP UHD trucks) that was designed to support large sport events. We have already published a few posts related to full IP vans (e.g. Building a Large OB Truck Using SMPTE ST 2110 and ST 2110 – From Theory to Reality), but this design is slightly more innovative.

The most complex part of this solution is Broadcast Centre built for very large premium UHD productions (routing capabilities of 2000×2000 UHD IP feeds, 4 vision mixers). Such large productions take place only a few time a year, so for all the other times the same hardware can be reconfigured into smaller flypacks that can do multiple independent productions at different places around the world. All devices in Broadcast Centre are installed in mobile racks, so you can simply wheel them in and out of different sports venues.

These flypacks can also be used to extend capabilities of IP OB vans – the only limit is the number of ports available on the switches. A truck can be put in any location and connected to multiple IP systems, creating fully scalable and large broadcast system – the kind that you would only previously find in a fixed studio set up.

The case study covers lessons learned from this COTS based system which leverages SMPTE ST 2110, SMPTE 2059, and adaptive FPGA based edge processing. Maurice Snell focuses on advantages of ST 2110 IP design (massive simplification of wiring, use of COTS equipment, audio breakaway possibility, signal agnostic capabilities, flexibility, scalability) and describes the challenges (operators shouldn’t need to know or care if they are routing SDI, IP or a hybrid mixture of the two, importance of unified facility monitoring and configuration and a new approach to fault finding for engineers).

You can download the slides from here.

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Speaker

Maurice Snell
Senior System Consultant
Grass Valley