Streaming Video Alliance Archives – The Broadcast Knowledge

Video: Distribution in a Covid-19 World

Posted on 7th July 2021 by Russell Trafford-Jones

A look at the impacts of Covid-19 from the perspective of Disney+ and ESPN+. In this talk Eric Klein from Disney Streaming Services gives his view on the changes and learnings he saw as Covid hit and as it continues. He first comments on the increase in ‘initial streams’ as the lockdowns hit with Austria topping the list with a 44% increase of time spent streaming within a just a 48-hour period and in the US, Comcast has reported an uptick of 38% in general streaming and web video consumption. Overall fixed broadband networks tended to do better with the peaks than mobile broadband, whereas mobile internet which is quite common in Italy was observed to be suffering.

Distribution in a Covid-19 World from Streaming Video Alliance on Vimeo.

Content providers played their part to help with the congestion in adjusting to the situation by altering video profiles and changing starting bitrates as part of an industry-wide response. And it’s this element of everybody playing their part which seems to be the secret sauce behind Eric’s statement that “the internet is more resilient than everybody thought”. Eric goes on to point out that such networks are designed to deal with these situations as the first question is always “what’s your peak traffic going to be”. Whilst someone’s estimates may be off, the point is that networks are provisioned for peaks so when many peak forecasts come to pass, their average is usually within the network’s capabilities. The exceptions come on last-mile links which are much more fixed than provisioning of uplink ports and router backplane bandwidth within datacentres.

Eric points out the benefits of open caching, a specification in development within the Streaming Video Alliance. Open caching allows for an interoperable way of delivering files into ISP, modelled around popular data, so that services can cache data much closer to customers. By doing this, Eric points to data which has shown an ability to deliver an up to 15% increase in bandwidth as well as a 30% decrease in ‘customer-impacting events.

This session ends with a short Q&A

Watch now!
Speakers

	Eric Klein Co-Chair, Open Caching Workgroup, Streaming Video Alliance, Director, Content Distribution, Disney Streaming Services
	Moderator: Jason Thibeault Executive Director, Streaming Video Alliance

Video: Examining the OTT Technology Stack

Posted on 24th June 2021 by Russell Trafford-Jones

This video looks at the whole streaming stack asking what’s now, what trends are coming to the fore and how are things going to be done better in the future? Whatever part of the stack you’re optimising, it’s vital to have a way to measure the QoE (Quality of Experience) of the viewer. In most workflows, there is a lot of work done to implement redundancy so that the viewer sees no impact despite problems happening upstream.

The Streaming Video Alliance’s Jason Thibeault diggs deeper with Harmonic’s Thierry Fautier, Brenton Ough from Touchstream, SSIMWAVE’s Hojatollah Yeganeh and Damien Lucas from Ateme.

Talking about Codecs, Thierry makes the point that only 7% of devices can currently support AV1 and with 10 billion devices in the world supporting AVC, he sees a lot of benefit in continuing to optimise this rather than waiting for VVC support to be commonplace. When asked to identify trends in the marketplace, moving to the cloud was identified as a big influencer that is driving the ability to scale but also the functions themselves. Gone are the days, Brenton says, that vendors ‘lift and shift’ into the cloud. Rather, the products are becoming cloud-native which is a vital step to enable functions and products which take full advantage of the cloud such as being able to swap the order of functions in a workflow. Just-in-time packaging is cited as one example.

Examining the OTT Technology Stack from Streaming Video Alliance on Vimeo.

Other changes are that server-side ad insertion (SSAI) is a lot better in the cloud and sub partitioning of viewers, where you do deliver different ads to different people, is more practical. Real-time access to CDN data allowing you near-immediate feedback into your streaming process is also a game-changer that is increasingly available.

Open Caching is discussed on the panel as a vital step forward and one of many areas where standardisation is desperately needed. ISPs are fed up, we hear, of each service bringing their own caching box and it’s time that ISPs took a cloud-based approach to their infrastructure and enabled multiple use servers, potentially containerised, to ease this ‘bring your own box’ mentality and to take back control of their internal infrastructure.

HDR gets a brief mention in light of the Euro soccer championships currently on air and the Japan Olympics soon to be. Thierry says 38% of Euro viewership is over OTT and HDR is increasingly common, though SDR is still in the majority. HDR is more complex than just upping the resolution and requires much more care over which screen it’s watched. This makes adopting HDR more difficult which may be one reason that adoption is not yet higher.

The discussion ends with a Q&A after talking about uses for ‘edge’ processing which the panel agrees is a really important part of cloud delivery. Processing API requests at the edge, doing SSAI or content blackouts are other examples of where the lower-latency response of edge compute works really well in the workflow.

Watch now!
Speakers

	Thierry Fautier VP Video Strategy. Harmonic Inc.
	Damien Lucas CTO, Ateme
	Hojatollah Yeganeh Research Team Lead SSIMWAVE
	Brenton Ough CEO & Co-Founder, Touchstream
	Moderator: Jason Thibeault Executive Director, Streaming Video Alliance

Video: 5G – Game-Changer Or Meh?

Posted on 20th May 2021 by Russell Trafford-Jones

The 5G rollout has started in earnest in the UK, North America, Asia and many other regions. As with any new tech rollout, it takes time and currently centres on densely populated areas, but tests and trials are already underway in TV productions to find out whether 5G can actually help improve workflows. Burnt by the bandwidth collapse of 4G in densely populated locations, there’s hope amongst broadcasters that the higher throughput and bandwidth slicing will, this time, deliver the high bandwidth, reliable connectivity that the industry needs.

Jason Thibeault from the Streaming Video Alliance join’s Zixi’s Eric Bolten to talk to Eric Schumacher-Rasmussen who moderates this discussion on how well 5G is standing up to the hype. For a deeper look at 5G, including understanding the mix of low frequencies (as used in 2G, 3G and 4G) and high, Ultra Wide Band (UWB) frequencies referred to in this talk, check out our article which does a deep dive on 5G covering roll out of infrastructure and many of the technologies that make it work.

Eric starts by discussing trials he’s been working on in including one which delivered 8K at 100Mbps over 5G. He sees 5G as being very useful to productions whether on location or on set. He’s been working to test routers and determine the maximum throughput possible which we already know is in excess of 100Mbps, likely in the gigabits. Whilst rollouts have started and there’s plenty of advertising surrounding 5G, the saturation in the market of 5G-capable phones is simply not there but that’s no reason for broadcasters of film crews not to use it. 30 markets in the US are planning to be 5G enabled and all the major telcos in the UK are rolling the technology out which is already in around 200 cities and towns. It’s clear that 5G is seen as a strategic technology for governments and telcos alike.

Jason talks about 5G’s application in stadia because it solves problems for both the on-location viewers but also the production team themselves. One of the biggest benefits of 5G is the ultra-low-latency. Having 5G cameras keeps wireless video in the milliseconds using low-latency codecs like JPEG XS then delivery to fans within the stadium can also be within milliseconds meaning the longest delay in the whole system is the media workflow required for mixing the video, adding audio and graphics. The panel discusses how this can become a strong selling point for the venue itself. Even supporters who don’t go into the stadium itself can come to an adjacent location for good food, drinks a whole load of like-minded people, massive screens and a second-screen experience like nothing available at home. On top of all of that, on-site betting will be possible, enabled by the low latency.

Moving away from the stadium, North America has already seen some interest in linking the IP-native ATSC 3.0 broadcast network to the 5G network providing backhaul capabilities for telcos and benefits for broadcasters. If this is shown to be practical, it shows just how available IP will become in the medium-term future.

Jason summarises the near-term financial benefits in two ways: the opportunity for revenue generation by delivering better video quality and faster advertising but most significantly he sees getting rid of the need for satellite backhaul as being the biggest immediate cost saver for many broadcast companies. This won’t all be possible on day one, remembering that to get the major bandwidths, UWB 5G is needed which is subject to a slower roll-out. UWB uses high-frequency RF, 24Ghz and above, which has very little penetration and relies on line-of-sight links. This means that even a single wall can block the signal but those that can pick it up will get gigabits of throughput.

The panel concludes by answering a number of questions from the audience on 5G’s benefit over fibre to the home, the benefits of abstracting the network out of workflows and much more.

Watch now!
Speakers

	Jason Thibeault Executive Director, Streaming Video Alliance
	Eric Bolten VP of Business Development, Zixi
	Moderator: Eric Schumacher-Rasmussen Editor-in-Chief, Streaming Media

Video: Best Practices for End-to-End Workflow and Server-Side Ad Insertion Monitoring

Posted on 26th March 2021 by Russell Trafford-Jones

This video from the Streaming Video Alliance, presented at Mile High Video 2020 looks at the result of recent projects document the best practice for two important activities: server-side ad insertion (SSAI) and end-to-end (E2E) workflow monitoring. First off, is E2E monitoring which defines a multi-faceted approach to making sure you’re delivering good-quality content well.

The this part of the talk is given by Christopher Kulbakas who introduces us to the document published by the Streaming Video Alliance covering monitoring best practices. The advice surrounds three principles: Creating a framework, deciding on metrics, and correlation. Christopher explains the importance of monitoring video quality after a transcode or encode since it’s easy to take a sea of green from your transport layer to indicate that viewers are happy. If your encode looks bad, viewers won’t be happy just because the DASH segments were delivered impeccably.

The guidance helps your monitor your workflow. ‘End to end’ doesn’t imply the whole delivery chain, only how to ensure the part you are responsible for is adequately monitored.

Christopher unveils the principles behind the modular monitoring across the workflow and tech stack:
1) Establish monitoring scope
Clearly delineate your responsibility from that of other parties. Define exactly how and to what standard data will be handled between the parties.

2) Partition workflow with monitoring points
Now your scope is clear, you can select monitoring points before and after key components such as the transcoder.

3) Decompose tech stage
Here, think of each point in the workflow to be monitored as a single point in a stack of technology. There will be content needing a perceptual quality monitor, Quality of Service (QoS) and auxiliary layers such as player events, logs and APIs which can be monitored.

4) Describe Methodology
This stage calls for documenting the what, where, how and why of your choices, for instance explaining that you would like to check the manifest and chunks on the output of the packager. You’d do this with HTTP-GET requests for the manifest and chunks for all rungs of the ladder. After you have finished, you will have a whole set of reasoned monitoring points which you can document and also share with third parties.

5) Correlate results
The last stage is bringing together this data, typically by using an asset identifier. This way, all alarms for an asset can be grouped together and understood as a whole workflow.

End-to-End Server-Side Ad Monitoring

The last part of this talk is from Mourad Kioumgi from Sky who walks us through a common scenario and how to avoid it. An Ad Buyer complains their ad didn’t make it to air. Talking to every point in the chain, everyone checks their own logs and says that their function was working, from the schedulers to the broadcast team inserting the SCTE markers. The reality is that if you can’t get to the bottom of this, you’ll lose money as you lose business and give refunds.

The Streaming Video Alliance considered how to address this through better monitoring and are creating a blueprint and architecture to monitor SSAI systems.

Mourad outlines these possible issues that can be found in SSAI systems:
1) Duration of content is different to the ad duration.
2) Chunks/manifest are not available or poorly hosted
3) The SCTE marker fails to reach downstream systems
4) Ad campaigns are not fulfilled despite being scheduled
5) Ad splicing components fail to create personalised manifests
6) Over-compression of the advert.

Problems 2,3, 5 and 6 are able to be caught by the monitoring proposed which revolves around adding the Creative ID and AdID into the manifest file. This way, problems can be correlated which particularly improves the telemetry back from the player which can deliver a problem report and specify which asset was affected. Other monitoring probes are added to monitor the manifests and automatic audio and video quality metrics. Sky successfully implemented this as a proof of concept with two vendors working together resulting in a much better overview of their system.

Mourad finishes his talk looking at the future creating an ad monitoring framework to distribute an agreed framework document for. best practices.

Watch now!
Speakers

	Christopher Kulbakas Project Lead, Senior Systems Designer, Media Technology & infrastructure, CBC/Radio Canada
	Mourad Kioumgi VOD Solutions Architect. Sky

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