ACMMM’19 Tutorial: A Journey towards Fully Immersive Media Access

ACM Multimedia 2019
October 21-25, 2019, Nice, France

Note: exact date/time slot of this tutorial will be provided at a later stage

Christian Timmerer, Alpen-Adria-Universität Klagenfurt & Bitmovin, Inc.
Ali C. Begen, Ozyegin University and Networked Media

Universal media access as proposed in the late 90s, early 2000 is now reality. Thus, we can generate, distribute, share, and consume any media content, anywhere, anytime, and with/on any device. A major technical breakthrough was the adaptive streaming over HTTP resulting in the standardization of MPEG-DASH, which is now successfully deployed in HTML5 environments thanks to corresponding media source extensions (MSE). The next big thing in adaptive media streaming is virtual reality applications and, specifically, omnidirectional (360°) media streaming, which is currently built on top of the existing adaptive streaming ecosystems. This tutorial provides a detailed overview of adaptive streaming of both traditional and omnidirectional media within HTML5 environments. The tutorial focuses on the basic principles and paradigms for adaptive streaming – both traditional and omnidirectional media – as well as on already deployed content generation, distribution, and consumption workflows. Additionally, the tutorial provides insights into standards and emerging technologies in the adaptive streaming space. Finally, the tutorial includes the latest approaches for immersive media streaming enabling 6DoF DASH through Point Cloud Compression (PCC) and concludes with open research issues and industry efforts in this domain.

Keywords: Omnidirectional media, HTTP adaptive streaming, over-the-top video, 360 video, virtual reality, immersive media access.

Learning Objectives
This tutorial consists of two main parts. In the first part, we provide a detailed overview of the HTML5 standard and show how it can be used for adaptive streaming deployments. In particular, we focus on the HTML5 video, media extensions, and multi-bitrate encoding, encapsulation and encryption workflows, and survey well-established streaming solutions. Furthermore, we present experiences from the existing deployments and the relevant de jure and de facto standards (DASH, HLS, CMAF) in this space. In the second part, we focus on omnidirectional (360-degree) media from creation to consumption as well as first thoughts on dynamic adaptive point cloud streaming. We survey means for the acquisition, projection, coding and packaging of omnidirectional media as well as delivery, decoding and rendering methods. Emerging standards and industry practices are covered as well (OMAF, VR-IF). Both parts present some of the current research trends, open issues that need further exploration and investigation, and various efforts that are underway in the streaming industry. Upon attending this tutorial, the participants will have an overview and understanding of the following topics:

  • Principles of HTTP adaptive streaming for the Web/HTML5
  • Principles of omnidirectional (360-degree) media delivery
  • Content generation, distribution and consumption workflows for traditional and omnidirectional media
  • Standards and emerging technologies in the adaptive streaming space
  • Current and future research on traditional and omnidirectional media delivery, specifically enabling 6DoF adaptive streaming through point cloud compression

ACM Multimedia attracts attendees that are quite knowledgeable in specific areas. However, not all are experts across multiple disciplines (such as the subject matter here) and only few are familiar with what is happening in the field and standards. Thus, we believe the proposed tutorial will be of interest to this year’s attendees as much as it did in the past.

Table of Contents
Part I: The HTML5 Standard and Adaptive Streaming

  • HTML5 video and media extensions
  • Survey of well-established streaming solutions
  • Multi-bitrate encoding, and encapsulation and encryption workflows
  • The MPEG-DASH standard, Apple HLS and the developing CMAF standard
  • Common issues in scaling and improving quality, multi-screen/hybrid delivery

Part II: Omnidirectional (360-degree) Media

  • Acquisition, projection, coding and packaging of 360-degree video
  • Delivery, decoding and rendering methods
  • The developing MPEG-OMAF and MPEG-I standards
  • Ongoing industry efforts, specifically towards 6DoF adaptive streaming

Christian Timmerer received his M.Sc. (Dipl.-Ing.) in January 2003 and his Ph.D. (Dr.techn.) in June 2006 (for research on the adaptation of scalable multimedia content in streaming and constraint environments) both from the Alpen-Adria-Universität (AAU) Klagenfurt. He joined the AAU in 1999 (as a system administrator) and is currently an Associate Professor at the Institute of Information Technology (ITEC) within the Multimedia Communication Group. His research interests include immersive multimedia communication, streaming, adaptation, Quality of Experience, and Sensory Experience. He was the general chair of WIAMIS 2008, QoMEX 2013, MMSys 2016, and PV 2018 and has participated in several EC-funded projects, notably DANAE, ENTHRONE, P2P-Next, ALICANTE, SocialSensor, COST IC1003 QUALINET, and ICoSOLE. He also participated in ISO/MPEG work for several years, notably in the area of MPEG- 21, MPEG-M, MPEG-V, and MPEG-DASH where he also served as standard editor. In 2013, he cofounded Bitmovin ( to provide professional services around MPEG-DASH where he holds the position of the Chief Innovation Officer (CIO) – Head of Research and Standardization. He is a senior member of IEEE and member of ACM, specifically IEEE Computer Society, IEEE Communications Society, and ACM SIGMM. Dr. Timmerer was a guest editor of three special issues for the IEEE Journal on Selected Areas in Communications (JSAC) and currently serves as associate editor for IEEE Transactions on Multimedia. Further information available at

Ali C. Begen is the co-founder of Networked Media, a technology company that offers consulting services to industrial, legal and academic institutions in the IP video space. He has been a research and development engineer since 2001, and has broad experience in mathematical modeling, performance analysis, optimization, standards development, intellectual property and innovation. Between 2007 and 2015, he was with the Video and Content Platforms Research and Advanced Development Group at Cisco, where he designed and developed algorithms, protocols, products and solutions in the service provider and enterprise video domains. Currently, he is also affiliated with Ozyegin University, where he is teaching and advising students in the computer science department. Ali has a PhD in electrical and computer engineering from Georgia Tech. To date, he received a number of academic and industry awards, and was granted 30+ US patents. He held editorial positions in leading magazines and journals, and served in the organizing committee of several international conferences and workshops in the field. He is a senior member of both the IEEE and ACM. In 2016, he was elected distinguished lecturer by the IEEE Communications Society, and in 2018, he was re-elected for another two-year term. More details are at

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QoMEX’19: Tile-based Streaming of 8K Omnidirectional Video: Subjective and Objective QoE Evaluation

Tile-based Streaming of 8K Omnidirectional Video: Subjective and Objective QoE Evaluation


Raimund Schatz (AIT Austrian Institute of Technology), Anatoliy Zabrovskiy (Alpen-Adria Universität Klagenfurt), Christian Timmerer (Alpen-Adria Universität Klagenfurt, Bitmovin Inc.)

Abstract: Omnidirectional video (ODV) streaming applications are becoming increasingly popular. They enable a highly immersive experience as the user can freely choose her/his field of view within the 360-degree environment. Current deployments are fairly simple but viewport-agnostic which inevitably results in high storage/bandwidth requirements and low Quality of Experience (QoE). A promising solution is referred to as tile- based streaming which allows to have higher quality within the user’s viewport while quality outside the user’s viewport could be lower. However, empirical QoE assessment studies in this domain are still rare. Thus, this paper investigates the impact of different tile-based streaming approaches and configurations on the QoE of ODV. We present the results of a lab-based subjective evaluation in which participants evaluated 8K omnidirectional video QoE as influenced by different (i) tile-based streaming approaches (full vs. partial delivery), (ii) content types (static vs. moving camera), and (iii) tile encoding quality levels determined by different quantization parameters. Our experimental setup is characterized by high reproducibility since relevant media delivery aspects (including the user’s head movements and dynamic tile quality adaptation) are already rendered into the respective processed video sequences. Additionally, we performed a complementary objective evaluation of the different test sequences focusing on bandwidth efficiency and objective quality metrics. The results are presented in this paper and discussed in detail which confirm that tile-based streaming of ODV improves visual quality while reducing bandwidth requirements.

Index Terms: Omnidirectional Video, Tile-based Streaming, Subjective Testing, Objective Metrics, Quality of Experience

Acknowledgment: This work was supported in part by the Austrian Research Promotion Agency (FFG) under the Next Generation Video Streaming project “PROMETHEUS”.

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Multi-Codec DASH Dataset accepted for publication at ACM MMSys 2018

Our paper on “Multi-Codec DASH Dataset” has been accepted for publication at ACM Multimedia Systems (MMSys) 2018. Details and links to our dataset can be found here. A pre-print of our paper is also available on Finally, Bitmovin presented it on their blog as well as NABShow 2018, see further details here.
We are looking forward meeting you at MMSys 2018.
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New Publication: A Comparative Study of DASH Representation Sets Using Real User Characteristics

We are proud to announce that our article “A Comparative Study of DASH Representation Sets Using Real User Characteristics” has been accepted for publication in the 26th ACM SIGMM Workshop on Network and Operating Systems Support for Digital Audio and Video (NOSSDAV 2016) co-located with MMsys 2016 and held in Klagenfurt am Wörthersee, Austria, on May 10-13, 2016.
We are looking to forward to meet you @ NOSSDAV 2016 and @ MMSys 2016

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ITEC-DASH project nominated for Houskapreis 2016

The ITEC project around adaptive media streaming over HTTP – which significantly contributed to the MPEG-DASH standard – has been nominated for the prestigious Houskapreis 2016 in the category of ‘academic research’ (German “Universitäre Forschung”).

The project will presented to the public on April 28, 2016 in Vienna at the Museum of Applied Arts where the actual winner will be announced.

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New Publication: Investigating the Performance of Pull-based Dynamic Adaptive Streaming in NDN

We are proud to announce that our article Investigating the Performance of Pull-based Dynamic Adaptive Streaming in NDN has been accepted for publication in IEEE Journal on Selected Areas in Communications (Special Issue on Video Distribution over Future Internet). The article will be published in the second quarter of 2016.

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ACM Multimedia Systems Conference 2016 in Klagenfurt, Austria

We are proud to announce that the ACM MMSys 2016 will be held in Klagenfurt, Austria. A preliminary call for papers is already available here. We want to emphasize that co-located to the MMSys 2016 there is a range of high quality workshop like the NOSSDAV (Network and Operating Systems Support for Digital Audio and Video Workshop CFP), MoVid (Mobile Video Workshop), and MMVE (Massively Multiuser Virtual Environments Workshop).
For the conference the preliminary dates are:
Submission Deadline: November 27, 2015
Reviews available to Authors: January 15, 2016
Rebuttal Deadline: January 22, 2016
Acceptance Notification: January 29, 2015
Camera-ready Deadline: March 11, 2016
General Chair: Christian Timmerer, AAU
TPC Chair: Ali C. Begen, CISCO
Dataset Chair: Karel Fliegel, CTU
Demo Chairs: Omar Niamut, TNO & Michael Zink, UMass
Proceedings Chair: Benjamin Rainer, AAU
Asia: Sheng-Wei Chen (Kuan-Ta), Academia Sinica
Middle East: Mohamed Hefeeda, QCRI
Europe: Vincent Charvillat, IRIT-ENSEEIHT-Toulouse Univ.
Local Chair: Laszlo Böszörmenyi, AAU

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Meet us at the ICME in Torino

We are proud to announce that we are going to attend this years ICME in Torino, Italy.
The following full paper of Christopher Mueller (Bitmovin GmbH) got accepted for an oral presentation:
Oscillation Compensating Dynamic Adaptive Streamin Over HTTP, Christopher Mueller (Bitmovin GmbH), Stefan Lederer (bitmovin GmbH), Reinhard Grandl (bitmovin GmbH), Christian Timmerer (Alpen-Adria-Universität Klagenfurt, Austria)
We further have two workshop papers that investigate multimedia streaming in ICN/NDN/CCN at the MuSIC workshop co-located with the ICME:
Towards Controller-aided Multimedia Dissemination in Named Data Networking, Florian Bacher (Alpen-Adria-Universität Klagenfurt, Austria), Benjamin Rainer (Alpen-Adria-Universität Klagenfurt, Austria), Hermann Hellwagner (Alpen-Adria-Universität Klagenfurt, Austria)
Modelling the Impact of Caching and Popularity on Concurrent Adaptive Multimedia Streams in Information-Centric Networks, Christian Kreuzberger (Alpen-Adria-Universität Klagenfurt, Austria), Benjamin Rainer (Alpen-Adria-Universität Klagenfurt, Austria), Hermann Hellwagner (Alpen-Adria-Universität Klagenfurt, Austria)
Moreover, Christian Timmer and Ali C. Begen will give their superior Tutorial on Over-the-Top Content Delivery, do not miss it!
Over-the-Top Content Delivery: State of the Art and Challenges Ahead, Christian Timmerer (Alpen-Adria-Universität Klagenfurt, Austria), Ali C. Begen (CISCO)

Posted in DASH | Leave a comment – The Future of Adaptive Video Transcoding is the future of transcoding, providing a high performance cloud-service to transcode multimedia content orders of magnitudes faster than real-time, even for highest 4K qualities and beyond.

Read the full article at

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Workshop on Multimedia Streaming in Information-Centric Networks (MuSIC)

For more information: MuSIC Workshop
Topics of Interests

      Video-on-demand applications, prototypes, and demos over ICN
      Voice/video conferencing applications, prototypes, and demos over ICN
      Novel multimedia applications, prototypes, and demos over ICN
      Error and loss control and mitigation
      Congestion detection and control
      Naming and routing of media streams
      Forwarding, aggregation, replication strategies (interests and content)
      Caching strategies
      Caching effects (probably unexpected and/or undesired)
      DRM and its impact on or interplay with caching
      Content adaptation in ICN
      Media stream adaptation, bandwidth estimation etc. on clients
      Use of scalable media content
      Fairness issues and metrics in ICN
      Security and Privacy issues for multimedia streaming over ICN
      QoS and QoE mechanisms and metrics: impact on and interplay with ICN
      Evaluation methodologies, in particular ICN simulation and experimental testbeds
      Deployment and scalability issues

Important Dates
Paper Submission: March 30, 2015
Acceptance Notification: April 30, 2015
Camera Ready: May 15, 2015
Workshop Date: July 3, 2015

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