People are relentlessly trying to find better ways to compress video. For some, better means lower bitrate. For some, this means faster processing. But for everyone, this means new codecs and new standards.
Andreas Rossholm from Eyevinn Technology gives us the ‘lay of the land’ and explains the factors looming large in the minds of those who are developing the new standards.
Perceived Quality (QoE) is influenced by many factors, so is a moveable, translatable feast when it comes to pinning it down to a number. Andreas also talks about objective and subjective measurements are both valuable and so very different. We also see the advance from 2017 into 2018 of HEVC and AV1 with a look at the things to look out for when you hear about the results of a test. This will help you work out whether the results apply to you, or whether you need to do your own.
Andreas does a great job of explaining the types of things codecs are trying to minimise and the tools they’re using to succeed.
With a final look to the future and how codecs like AV1 and HEVC will perform, Andreas reminds us it’s not just about the codecs but also about how you use them; per-title parameters or per-shot?
Video compression is a never-ending endavour with hundreds of techniques possible. Some which aren’t in use are waiting for computers to catch up or, in this case, to find the best way to apply new techniques, such as machine learning, to the task.
In this talk from Streaming Tech Sweden 2018, Fritz Barnes from Entecon explains that region of interest compression – where you compress the image more in areas where the viewer won’t be looking – can significantly help reduce bitrate.
Fritz looks at techniques to analyse video and work out where people will be looking. This technique is called ‘saliancy deteciton’ and has been made practical by machine learning. Convolutional Neural Networks are introduced. The extensive training material is introduced and explains the model used to learn from it. Optical flow is a way to encode the motion of the video and is also part of the video.
The talk finishes by looking at the results of this technique; both the successes and problems.
Watch now! Free registration required
Streaming Tech Sweden is an annual conference run by Eyevinn Technology in Sweden. Talks are recorded and are available to delegates for several months and are then freely available. Whilst registration is required on the website, it is free to register and to watch this video.
Patrick Debois summarises the world of low-latency players from his perspective of wanting to deploy his own solution.
Low- and ultra low-latency is an emerging market in the sense that there are few standards and getting the solutions working at scale and across all platforms is difficult and is a ‘work in progress’. As such, selecting a player is a compromise and there are many issues at play.
Patrick covers the following aspects:
DIY vs ‘as a service’ models
Different methods of ingest (replacing RTMP?)
Platform support & SDK size
From event to event it’s not a surprise that streaming traffic increases, but this look at the Wolrd Cup 2018 shows a very sharp rise beating many expecatations. Joachim Hengge tells us what hte World Cup looked like from Akamai’s perspective.
Joachim takes us through the stats for streaming the World Cup where they peaked at 23Tbps of throuhgput with nearly 10 million concurrent viewers. The bandwidth was significantly higher than the last World Cup but looking at the data, we can learn a few more things about the market.
After looking at a macth-by-match breakdown we look at a sytsem architecture for one customer who delivered the World Cup to highlight the importance of stable content ingest, latency and broadcast quality. Encoding and packaging into HLS with 4-second chunks were tasks done on site with the rest happening within Akamai and being fed to other CDNs. Joachim pulls this together into three key recommendations for anyone looking at streaming large events before delvingin to some Sweden-specific streaming stats where over 81% of feeds were played back at the highest quality.
This talk is from Streaming Tech Sweden, an annual conference run by Eyevinn Technology. Videos from the event are available to paid attendees but are released free of charge after several months. As with all videos on The Broadcast Knowledge, this is available free of charge after registering on the site.
Senior Product Manager, Media Services,
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