WOS’22: Workshop on Streaming, Thursday Nov. 24th 2022, at Inria Rennes and online
supported by Inria IRISA and Broadpeak
9h00 – Welcome Coffee ☕️
9h20 – Optimizing Video Delivery at the CDN Edge
Ali C. Begen (Ozyegin University): Server/Client Cooperation in Low-Latency Live Streaming
Abstract: Today, a glass-to-glass latency of 10-30 seconds is practically achievable in live streaming, and such a range is acceptable in most cases. Nevertheless, the increasing number of cord-cutters is putting pressure on streaming providers to offer low-latency live streaming, especially for sports content. This talk first presents the low-latency solutions the streaming industry produced in the last few years and then exemplifies in what ways the Common Media Client Data (CMCD) standard and its upcoming sister standard — Common Media Server Data (CMSD) — can help improve the low-latency delivery performance.
Franck Chi (B<>Com): A Variable frame rate algorithm and applications (short talk)
Abstract: Ultra-High Definition (UHD) Television has been defined to improve the quality of experience. This specification enhances several technical dimensions such as the dynamic range or the frame-rate. For instance, several studies have demonstrated that the High Frame Rate (HFR) format (+100 fps) improves significantly the perceived video quality. On the other hand, HFR brings several challenges to the transmission chain, including physical interfaces as well as increases in processing complexity and bit-rate. In this presentation, a Variable Frame Rate (VFR) solution is described to determine the minimal video frame-rate that preserves the perceived video quality of HFR videos. The frame-rate determination is modelled as a multiclass classification problem which consists in dynamically and locally selecting one frame-rate among three: input frame rate (HFRin), HFRin/2 or HFRin/4. The results of a subjective evaluation confirm that the proposed solution enables to locally determine the lowest possible frame-rate while preserving the quality of experience. Complementary works have demonstrated the possibility to apply the VFR algorithm on encoded video without additional transcoding. A prototype has been developped showing a VFR enhanced TS SRT transmission chain. VFR filtered streams are correctly displayed by off the shelf SRT players. Therefore the proposed VFR solution provides significant bit-rate savings, complexity reductions and thus energy savings at both encoder and decoder sides.
10h30 – 11h00 Coffee Break ☕️
11h00 – Multipath/P2P
Daniel Negru (INPB and Quanteec): Multi-source p2p streaming: next step towards a fair streaming
Abstract: Today’s solutions for streaming rely almost exclusively on a CDN approach. We can foresee the limits of this model in terms of scalability, quality and energy spent, especially when the audience is high. QUANTEEC tackles the problem with a different paradigm, turning each viewer into a potential re-streamer and enhancing the concept with a multi-source dimension. Each already existing resource is exploited at its maximum to efficiently serve the video content, whilst at the same time save maximum energy.
Quentin De Coninck (UC Louvain & KU Leuven): Integrating a Multipath Transport Protocol in my Application: Challenges to get Benefits
Abstract: With the increasing adoption of Multipath TCP (and more recently Multipath QUIC), applications can now simultaneously use several network paths. There are two major use cases for using multiple paths: bandwidth aggregation and fast network resiliency. However, “Multipath-specific” algorithms (path management, packet scheduling,…) often optimise specific applications and misusing them might lead to counter-intuitive results. In this talk, we will consider two simple applications having different requirements. Considering Multipath TCP and Multipath QUIC, we will see how these protocols behave in different network scenarios. We will conclude by a discussion about the streaming case.
12h30 – 14h Lunch 🍴
14h00 – Content Security
Gwenael Doerr (Synamedia): OTT and Anti-piracy
Abstract: Premium video and exclusive TV programs have been pirated for decades. Typical countermeasures involve cryptography-based mechanisms intended to prevent access to the content (conditional access, DRM) as well as forensic techniques to trace content once it has leaked (digital watermarking). The emergence of new video distribution models such as OTT had an impact on such content protection primitives. In this presentation, we will survey how proof-of-possession can be leveraged to prevent several users from accessing the same resource in a CDN using the same credentials. We will also highlight how OTT has motivated a deviation from the client-based watermarking architectures and showcase the A/B watermarking blueprint that became the industry standard nowadays.
14h45 – Energy 1
Daniel Schien (University of Bristol): Use-of-System approaches for Electricity Footprinting of Digital Media
Electricity footprints are the basis to estimate the carbon emissions from use of electricity. The current metrics suggested by carbon footprinting standards such as the Greenhouse Gas Protocol ICT sector guidance have shortcomings that undermine their effectiveness to support decision making with the goal to decarbonise the sector. In this talk I will be discussing these some of these shortcomings and present an idea how to move forward.
15h30 – 16h Coffee Break ☕️
16h00 – Energy 2
Olivier Le Meur (Interdigital): Energy aware technologies to improve the sustainability of video streaming
Abstract: Video streaming is growing extremely fast representing more than 82% of internet traffic. This rapid growth will continue in the coming years requiring massive energy to support the production, the delivery and the end-user consumption. This is not at all sustainable with respect to the amount of energy required and the ecological emergency we have to face.
The aim of this presentation is both to create awareness of the magnitude of the problem and to show what efforts are underway. We will specifically focus on new methods for delivering high-quality of experience while, in the meantime, reducing energy impact. Beyond the technological aspect, we will also discuss the standardization opportunities that are currently emerging.
Tushar Gohad (Intel): Energy-efficient Streaming Systems
Abstract: Global Internet use accounts for 3% of all carbon emissions, the same as the aviation industry. 82% being video streaming, a signficant contribution is from the content delivery infrastructure at Edge. This talk will cover efforts on making Edge CDN nodes more (resource- and thus) power-efficient, getting the most from the Watts we use, through advancements in CPU and system power management, and smarter Software architecture.
17h30 – Wrap up
Registrations are closed.
The workshop will be taking place at the Centre de conférence Inria, on the Beaulieu Campus of the University of Rennes 1, Avenue du Général Leclerc 35042 Rennes Cedex. More detailed travel information can be found here.