Sunday, January 14, 2018

Delivering Traditional and Omnidirectional Media

This tutorial will be given at the following events:



Abstract

Universal media access as proposed in the late 90s is now closer to reality. Users can generate, distribute and consume almost 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 most platforms. The next challenge in adaptive media streaming is virtual reality applications and, specifically, omnidirectional (360°) media streaming.
This tutorial first presents a detailed overview of adaptive streaming of both traditional and omnidirectional media, and focuses on the basic principles and paradigms for adaptive streaming. New ways to deliver such media are explored and industry practices are presented. The tutorial then continues with an introduction to the fundamentals of communications over 5G and looks into mobile multimedia applications that are newly enabled or dramatically enhanced by 5G.
A dedicated section in the tutorial covers the much-debated issues related to quality of experience. Additionally, the tutorial provides insights into the standards, open research problems and various efforts that are underway in the streaming industry.

Learning Objectives

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) media delivery
  • Content generation, distribution and consumption workflows
  • Standards and emerging technologies, new delivery schemes in the adaptive streaming space
  • Measuring, quantifying and improving quality of experience
  • Fundamental technologies of 5G
  • Features and services enabled or enhanced by 5G
  • Current and future research on delivering traditional and omnidirectional media

Table of Contents

Part I: Streaming (Presented by Dr. Begen and Dr. Timmerer)
  • Survey of well-established streaming solutions (DASH, CMAF and Apple HLS)
  • HTML5 video and media extensions
  • Multi-bitrate encoding, and encapsulation and encryption workflows
  • Common issues in scaling and improving quality, multi-screen/hybrid delivery
  • Acquisition, projection, coding and packaging of 360 video
  • Delivery, decoding and rendering methods
  • The developing MPEG-OMAF and MPEG-I standards
Part II: Communications over 5G (Presented by Dr. Ma and Dr. Begen)
  • 5G fundamentals: radio access and core network
  • Multimedia signal processing and communications
  • Emerging mobile multimedia use cases
  • Detailed analysis for selected use cases
  • Improving QoE

Speakers


Ali C. Begen recently joined the computer science department at Ozyegin University. Previously, he was a research and development engineer at Cisco, where he has architected, designed and developed algorithms, protocols, products and solutions in the service provider and enterprise video domains. Currently, in addition to teaching and research, he provides consulting services to industrial, legal, and academic institutions through Networked Media, a company he co-founded. Begen holds a Ph.D. degree in electrical and computer engineering from Georgia Tech. He received a number of scholarly and industry awards, and he has editorial positions in prestigious magazines and journals in the field. He is a senior member of the IEEE and a senior member of the ACM. In January 2016, he was elected as a distinguished lecturer by the IEEE Communications Society. Further information on his projects, publications, talks, and teaching, standards and professional activities can be foundhttp://ali.begen.net

Liangping Ma is with InterDigital, Inc., San Diego, CA. He is an IEEE Communication Society Distinguished Lecturer focusing on 5G technologies and standards, video communication and cognitive radios. He is an InterDigital delegate to the 3GPP New Radio standards. His current research interests include various aspects about ultra-reliable and low-latency communication, such as channel coding, multiple access and resource allocation. Previously, he led the research on Quality of Experience (QoE) driven system optimization for video streaming and interactive video communication. Prior to joining InterDigital in 2009, he was with San Diego Research Center and Argon ST (acquired by Boeing), where he led research on cognitive radios and wireless sensor networks and served as the principal investigators of two projects supported by the Department of Defense and the National Science Foundation, respectively. He is the co-inventor of more than 40 patents and the author/co-author of more than 50 journal and conference papers. He has been the Chair of the San Diego Chapter of the IEEE Communication Society since 2014. He received his PhD from University of Delaware in 2004 and his B.S. from Wuhan University, China, in 1998.

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 constrained 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 communications, streaming, adaptation, quality of experience, and sensory experience. He was the general chair of WIAMIS 2008, QoMEX 2013 and MMSys 2016, 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 a standard editor. In 2012, he co-founded Bitmovin to provide professional services around MPEG-DASH where he currently holds the position of the Chief Innovation Officer (CIO).

Saturday, January 6, 2018

What to care about in multimedia communication in 2018?

In the past days/weeks you may have witness a high number of forecasts/predictions for 2018, like this one here. I'm not so good at predictions and we all learned these days to be careful about speculation. Thus, my focus here is on things to care about in 2018.

MPEG and VCEG are working towards a new video coding standard (naming, number scheme yet to be defined) and the call for proposals is out. Responses will be evaluated by the 122nd MPEG meeting in April 2018 (San Diego, CA, USA) and a new standard is expected to be available in late 2020. The main focus of the CfP is (i) 360-degree omnidirectional video, (ii) high-dynamic range (HDR), (iii) wide colour gamut (WCG), and (iv) conventional standard-dynamic-range camera content. The goal is -- simple, as usual -- compress digital video content, i.e., twice as much as you did before with the same video quality, e.g., as HEVC, or get higher quality with the same number of bits (or a combination thereof). Initial, preliminary results indicate this goal is feasible and everyone is looking forward to the MPEG meeting in April; certainly a place to be.

In addition to what MPEG/VCEG is doing, the Alliance for Open Media gained significant attention with its AV1 codec, first demos are available, and recently also Apple joined AOM. AV1 is not longer controlled by a single company, and, thus, it is becoming a real alternative in the video coding landscape, specifically for the streaming market. The nice thing, it's open source and royalty-free! In other words, one should not neglect AV1 and I think we will see many, hopefully good news in 2018.

On this topic, you might be interested in reading this and this.

What about DASH in 2018? We will see a 3rd edition of MPEG-DASH, the DASH-IF will further work on interoperability points, and I expect further convergence of DASH and HLS towards CMAF. However, I also expect minor changes for the main, common use cases utilizing the core technology of HTTP adaptive streaming. Changes, if any, will be transparent to most of us. On the other hand, immersive media and user engagement will become more and more important as more services are delivered over the top leading to more content becoming available to end users, thus, increasing competition among providers, vendors, etc. As a consequence, (a) content, (b) quality, and (c) costs will be important aspects, whereby (a+c) are "easy to sell" but (b) is still difficult to quantify (and "sell") with many open issues to solve in the (near) future.

Before drifting off to forecasts and predictions, I'd like to conclude with a list of scientific events in 2018 which are worthwhile to attend:
  • QoMEX -- Int'l Conf. on Quality of Multimedia Experience -- will be hosted in Sardinia, Italy from May 29-31, which is THE conference to be for QoE of multimedia applications and services. Submission deadline is January 15/22, 2018.
  • MMSys -- Multimedia Systems Conf. -- and specifically Packet Video, which will be on June 12 in Amsterdam, The Netherlands. Packet Video is THE adaptive streaming scientific event 2018. Submission deadline is March 1, 2018.
  • Additionally, you might be interested in ICME (July 23-27, 2018, San Diego, USA; I'm part of a tutorial there;), ICIP (October 7-10, 2018, Athens, Greece; specifically in the context of video coding), and PCS (June 24-27, 2018, San Francisco, CA, USA; also in the context of video coding).
  • The DASH-IF academic track hosts special events at MMSys (Excellence in DASH Award) and ICME (DASH Grand Challenge).
  • MIPR -- 1st Int'l Conf. on Multimedia Information Processing and Retrieval -- will be in Miami, Florida, USA from April 10-12, 2018. It has a broad range of topics including networking for multimedia systems as well as systems and infrastructures.

Tuesday, December 19, 2017

University Assistant (f/m)

Alpen-Adria-Universität Klagenfurt announces the following job vacancy (in accordance with § 107 Abs. 1 Universitätsgesetz 2002):

University Assistant (f/m)
(fixed-term employment for the period of 4 years, 40 hours/week (Uni-KV: B1)

at the Faculty for Technical Sciences, Dept. of Information Technology. The monthly minimum salary for this position as stated in the collective agreement and according to the classification scheme is €2.731 (pre-tax, 14 x per year), but may be higher due to previous employment periods eligible for inclusion and other earnings and remunerations. 

[Important note: this English version is only informative and the official description of the job vacancy is available here, only in German though]

Your duties:
  • Collaboration at the department within the research group “Multimedia Communication” in terms of research and teaching
  • Independent scientific research with the goal to obtain the conferral of a doctorate
  • Participation at the students’ counselling
  • Collaboration at administrative tasks within the department and university committees
  • Collaboration at public relations activities within the department and faculty

The research group “Multimedia Communication” conducts its research within the fields of communication, adaptation, quality of experience (QoE) and use of multimedia data, as well as in the area of future content-aware networks. The goal is to publish in international, high quality professional journals and conference proceedings and to cooperate with various commercial partners. With regard to teaching, additional fields such as computer organization, computer networks, operating systems and parallel systems are covered by our research group.

Your profile:
  • Master or diploma degree of Technical Science in the field of Informatics, Computer Engineering, Electrical Engineering, Information and Communication Engineering or Telematics completed at a domestic or foreign university (with good final degrees)
  • Excellent knowledge and experience in at least one of the following fields: computer organization, operating systems, computer networks, multimedia systems, distributed systems 

Desirable qualifications are:
  • Fluency in German and English, both in written and oral form
  • Excellent programming skills
  • Relevant international and practical work experience
  • Social and communicative competences and ability to work in a team
  • Experience with university teaching and research activities 

All relevant documents for the application (including copies of all school certificates and performance records) have to be submitted via the online application form www.aau.at/obf of Alpen-Adria-Universität Klagenfurt no later than January 10, 2018, mentioning reference number 639/17.

The goal of the position is to equip graduates of a master or diploma programme with the necessary technical and scientific training to complete a doctorate or PhD program in Technical Sciences. Applications of scientists already holding such a degree can therefore not be taken into further consideration.

Alpen-Adria-Universität Klagenfurt lays special emphasis on increasing the number of women in senior and in academic positions and therefore strongly invites qualified women to apply for this position. In case of equal qualifications, female applicants will receive preferential consideration.

Furthermore, persons with disabilities or chronic illnesses who meet the required qualification criteria are also explicitly invited to apply for the position. 

General information for applicants: www.aau.at/jobs/information

Additional information regarding the research group “Multimedia Communication” can be found online (www.aau.at/tewi/inf/itec/) or by phone +43-463-2700-3612 (Univ.-Prof. DI Dr. Hermann Hellwagner).

Alpen-Adria-Universität Klagenfurt cannot refund any travel or accommodation expenses that arise in connection with the admission procedure.

Thursday, December 14, 2017

MPEG news: a report from the 120th meeting, Macau, China

MPEG Meeting Plenary
The original blog post can be found at the Bitmovin Techblog and has been updated here to focus on and highlight research aspects. Additionally, this version of the blog post will be also posted at ACM SIGMM Records.

The MPEG press release comprises the following topics:
  • Point Cloud Compression – MPEG evaluates responses to call for proposal and kicks off its technical work 
  • The omnidirectional media format (OMAF) has reached its final milestone 
  • MPEG-G standards reach Committee Draft for compression and transport technologies of genomic data 
  • Beyond HEVC – The MPEG & VCEG call to set the next standard in video compression 
  • MPEG adds better support for mobile environment to MMT 
  • New standard completed for Internet Video Coding 
  • Evidence of new video transcoding technology using side streams 

Point Cloud Compression

At its 120th meeting, MPEG analysed the technologies submitted by nine industry leaders as responses to the Call for Proposals (CfP) for Point Cloud Compression (PCC). These technologies address the lossless or lossy coding of 3D point clouds with associated attributes such as colour and material properties. Point clouds are referred to as unordered sets of points in a 3D space and typically captured using various setups of multiple cameras, depth sensors, LiDAR scanners, etc., but can also be generated synthetically and are in use in several industries. They have recently emerged as representations of the real world enabling immersive forms of interaction, navigation, and communication. Point clouds are typically represented by extremely large amounts of data providing a significant barrier for mass market applications. Thus, MPEG has issued a Call for Proposal seeking technologies that allow reduction of point cloud data for its intended applications. After a formal objective and subjective evaluation campaign, MPEG selected three technologies as starting points for the test models for static, animated, and dynamically acquired point clouds. A key conclusion of the evaluation was that state-of-the-art point cloud compression can be significantly improved by leveraging decades of 2D video coding tools and combining 2D and 3D compression technologies. Such an approach provides synergies with existing hardware and software infrastructures for rapid deployment of new immersive experiences.
Although the initial selection of technologies for point cloud compression has been concluded at the 120th MPEG meeting, it could be also seen as a kick-off for its scientific evaluation and various further developments including the optimization thereof. It is expected that various scientific conference will focus on point cloud compression and may open calls for grand challenges like for example at IEEE ICME 2018.

Omnidirectional Media Format (OMAF)

The understanding of the virtual reality (VR) potential is growing but market fragmentation caused by the lack of interoperable formats for the storage and delivery of such content stifles VR’s market potential. MPEG’s recently started project referred to as Omnidirectional Media Format (OMAF) has reached Final Draft of International Standard (FDIS) at its 120th meeting. It includes
  • equirectangular projection and cubemap projection as projection formats; 
  • signalling of metadata required for interoperable rendering of 360-degree monoscopic and stereoscopic audio-visual data; and 
  • provides a selection of audio-visual codecs for this application. 
It also includes technologies to arrange video pixel data in numerous ways to improve compression efficiency and reduce the size of video, a major bottleneck for VR applications and services, The standard also includes technologies for the delivery of OMAF content with MPEG-DASH and MMT.
MPEG has defined a format comprising a minimal set of tools to enable interoperability among implementers of the standard. Various aspects are deliberately excluded from the normative parts to foster innovation leading to novel products and services. This enables us -- researcher and practitioners -- to experiment with these new formats in various ways and focus on informative aspects where typically competition can be found. For example, efficient means for encoding and packaging of omnidirectional/360-degree media content and its adaptive streaming including support for (ultra-)low latency will become a big issue in the near future.

MPEG-G: Compression and Transport Technologies of Genomic Data

The availability of high throughput DNA sequencing technologies opens new perspectives in the treatment of several diseases making possible the introduction of new global approaches in public health known as “precision medicine”. While routine DNA sequencing in the doctor’s office is still not current practice, medical centers have begun to use sequencing to identify cancer and other diseases and to find effective treatments. As DNA sequencing technologies produce extremely large amounts of data and related information, the ICT costs of storage, transmission, and processing are also very high. The MPEG-G standard addresses and solves the problem of efficient and economical handling of genomic data by providing new
  • compression technologies (ISO/IEC 23092-2) and 
  • transport technologies (ISO/IEC 23092-1), 
which reached Committee Draft level at its 120th meeting.
Additionally, the Committee Drafts for
  • metadata and APIs (ISO/IEC 23092-3) and 
  • reference software (ISO/IEC 23092-4) 
are scheduled for the next MPEG meeting and the goal is to publish Draft International Standards (DIS) at the end of 2018.
This new type of (media) content, which requires compression and transport technologies, is emerging within the multimedia community at large and, thus, input is welcome.

Beyond HEVC – The MPEG & VCEG Call to set the Next Standard in Video Compression

The 120th MPEG meeting marked the first major step toward the next generation of video coding standard in the form of a joint Call for Proposals (CfP) with ITU-T SG16’s VCEG. After two years of collaborative informal exploration studies and a gathering of evidence that successfully concluded at the 118th MPEG meeting, MPEG and ITU-T SG16 agreed to issue the CfP for future video coding technology with compression capabilities that significantly exceed those of the HEVC standard and its current extensions. They also formalized an agreement on formation of a joint collaborative team called the “Joint Video Experts Team” (JVET) to work on development of the new planned standard, pending the outcome of the CfP that will be evaluated at the 122nd MPEG meeting in April 2018. To evaluate the proposed compression technologies, formal subjective tests will be performed using video material submitted by proponents in February 2018. The CfP includes the testing of technology for 360° omnidirectional video coding and the coding of content with high-dynamic range and wide colour gamut in addition to conventional standard-dynamic-range camera content. Anticipating a strong response to the call, a “test model” draft design is expected be selected in 2018, with development of a potential new standard in late 2020.
The major goal of a new video coding standard is to be better than its successor (HEVC). Typically this "better" is quantified by 50% which means, that it should be possible encode the video at the same quality with half of the bitrate or a significantly higher quality with the same bitrate including. However, at this time the “Joint Video Experts Team” (JVET) from MPEG and ITU-T SG16 faces competition from the Alliance for Open Media, which is working on AV1. In any case, we are looking forward to an exciting time frame from now until this new codec is ratified and how it will perform compared to AV1. Multimedia systems and applications will also benefit from new codecs which will gain traction as soon as first implementations of this new codec becomes available (note that AV1 is available as open source already and continuously further developed).

MPEG adds Better Support for Mobile Environment to MPEG Media Transport (MMT)

MPEG has approved the Final Draft Amendment (FDAM) to MPEG Media Transport (MMT; ISO/IEC 23008-1:2017), which is referred to as “MMT enhancements for mobile environments”. In order to reflect industry needs on MMT, which has been well adopted by broadcast standards such as ATSC 3.0 and Super Hi-Vision, it addresses several important issues on the efficient use of MMT in mobile environments. For example, it adds distributed resource identification message to facilitate multipath delivery and transition request message to change the delivery path of an active session. This amendment also introduces the concept of a MMT-aware network entity (MANE), which might be placed between the original server and the client, and provides a detailed description about how to use it for both improving efficiency and reducing delay of delivery. Additionally, this amendment provides a method to use WebSockets to setup and control an MMT session/presentation.

New Standard Completed for Internet Video Coding

A new standard for video coding suitable for the internet as well as other video applications, was completed at the 120th MPEG meeting. The Internet Video Coding (IVC) standard was developed with the intention of providing the industry with an “Option 1” video coding standard. In ISO/IEC language, this refers to a standard for which patent holders have declared a willingness to grant licenses free of charge to an unrestricted number of applicants for all necessary patents on a worldwide, non-discriminatory basis and under other reasonable terms and conditions, to enable others to make, use, and sell implementations of the standard. At the time of completion of the IVC standard, the specification contained no identified necessary patent rights except those available under Option 1 licensing terms. During the development of IVC, MPEG removed from the draft standard any necessary patent rights that it was informed were not available under such Option 1 terms, and MPEG is optimistic of the outlook for the new standard. MPEG encourages interested parties to provide information about any other similar cases. The IVC standard has roughly similar compression capability as the earlier AVC standard, which has become the most widely deployed video coding technology in the world. Tests have been conducted to verify IVC’s strong technical capability, and the new standard has also been shown to have relatively modest implementation complexity requirements.

Evidence of new Video Transcoding Technology using Side Streams

Following a “Call for Evidence” (CfE) issued by MPEG in July 2017, evidence was evaluated at the 120th MPEG meeting to investigate whether video transcoding technology has been developed for transcoding assisted by side data streams that is capable of significantly reducing the computational complexity without reducing compression efficiency. The evaluations of the four responses received included comparisons of the technology against adaptive bit-rate streaming using simulcast as well as against traditional transcoding using full video re-encoding. The responses span the compression efficiency space between simulcast and full transcoding, with trade-offs between the bit rate required for distribution within the network and the bit rate required for delivery to the user. All four responses provided a substantial computational complexity reduction compared to transcoding using full re-encoding. MPEG plans to further investigate transcoding technology and is soliciting expressions of interest from industry on the need for standardization of such assisted transcoding using side data streams.

MPEG currently works on two related topics which are referred to as network-distributed video coding (NDVC) and network-based media processing (NBMP). Both activities involve the network, which is more and more evolving to highly distributed compute and delivery platform as opposed to a bit pipe, which is supposed to deliver data as fast as possible from A to B. This phenomena could be also interesting when looking at developments around 5G, which is actually much more than just radio access technology. These activities are certainly worth to monitor as it basically contributes in order to make networked media resources accessible or even programmable. In this context, I would like to refer the interested reader to the December'17 theme of the IEEE Computer Society Computing Now, which is about Advancing Multimedia Content Distribution.
Publicly available documents from the 120th MPEG meeting can be found here (scroll down to the end of the page). The next MPEG meeting will be held in Gwangju, Korea, January 22-26, 2018. Feel free to contact Christian Timmerer for any questions or comments.
Some of the activities reported above are considered within the Call for Papers at 23rd Packet Video Workshop (PV 2018) co-located with ACM MMSys 2018 in Amsterdam, The Netherlands. Topics of interest include (but are not limited to):
  • Adaptive media streaming, and content storage, distribution and delivery 
  • Network-distributed video coding and network-based media processing 
  • Next-generation/future video coding, point cloud compression 
  • Audiovisual communication, surveillance and healthcare systems 
  • Wireless, mobile, IoT, and embedded systems for multimedia applications 
  • Future media internetworking: information-centric networking and 5G 
  • Immersive media: virtual reality (VR), augmented reality (AR), 360° video and multi-sensory systems, and its streaming 
  • Machine learning in media coding and streaming systems 
  • Standardization: DASH, MMT, CMAF, OMAF, MiAF, WebRTC, MSE, EME, WebVR, Hybrid Media, WAVE, etc.
  • Applications: social media, game streaming, personal broadcast, healthcare, industry 4.0, education, transportation, etc. 
Important dates
  • Submission deadline: March 1, 2018 
  • Acceptance notification: April 9, 2018 
  • Camera-ready deadline: April 19, 2018

Wednesday, October 25, 2017

University Assistant (m/f)

The Alpen-Adria-Universität Klagenfurt announces the following job vacancy (in accordance with § 107 Abs. 1 Universitätsgesetz 2002):

University Assistant (m/f)
(fixed-term employment for the period of 4 years, 40 hours/week (Uni-KV: B1))

at the Faculty for Technical Sciences, Department for Computer Science. The monthly minimum salary for this position as stated in the collective agreement and according to the classification scheme is €2.731 (pre-tax, 14 x per year), but may be higher due to previous employment periods eligible for inclusion and other earnings and remunerations. Estimated commencement of duties will be the 1st of March, 2018.

Your duties:
  • Independent scientific research with the goal to obtain the conferral of a doctorate
  • Collaboration at the department within the research group “distributed systems” in terms of research and teaching
  • Independent scientific research within the field of distributed systems
  • Participation at the students’ counselling
  • Collaboration at administrative tasks within the department and university committees
  • Collaboration at public relations activities within the institute and faculty

The research group “Distributed Systems” does its research within the field of scientific high-performance computing, cloud computing and multimedia systems. The goal is to publish in international, high quality professional journals and conference transcripts and to cooperate with various commercial partners. With regard to teaching, additional fields such as computer networks, operation systems, distributed systems and compiler construction are covered by our research group.

Your profile:
  • Master or diploma degree of Technical Science in the field of Computer Science, completed at a domestic or foreign university (with good final degrees)
  • Excellent knowledge and experience in: high-performance computing, cloud-computing, virtualisation, big data, energy efficiency
  • Fluency in English, both in written and oral form

All relevant documents for the application (including copies of all school certificates and performance records) have to be submitted via the online application form www.aau.at/obf of the University of Klagenfurt no later than the 8th of November, mentioning reference number 607/17.

Desirable qualifications are:
  • Fluency in German, both in written and oral form
  • Excellent programming skills, especially C++ and Java
  • Experience in handling OpenStack
  • Relevant international and practical work experience
  • Social and communicative competences and ability to work in a team
  • Experience with university teaching and research activities

The goal of the position is to equip graduates of a master or diploma programme with the necessary technical and scientific training to complete a doctorate or PhD. In Technical Sciences. Applications of scientists already holding such degree can therefore not be taken into further consideration.

The University of Klagenfurt lays special emphasis on increasing the number of women in senior and in academic positions and therefore strongly invites qualified women to apply for this position. In case of equal qualifications, female applicants will receive preferential consideration.

Furthermore, persons with disabilities or chronic illnesses who meet the required qualification criteria are also explicitly invited to apply for the position.

General information for applicants: www.aau.at/jobs/information

Additional information regarding the research group “Distributed Multimedia Systems” can be found online (www.aau.at/tewi/inf/itec/) or by phone +43-463-2700-3611 (Univ.-Prof. DI Dr. Radu Prodan).

The University of Klagenfurt cannot refund any travel or accommodation expenses that arises in connection with the admission procedure.

Saturday, October 14, 2017

Happy World Standards Day 2017

Today on October 14 we celebrate the World Standards Day which is a good opportunity to review how standards impact our everyday's life. In fact, many standards help me creating this blog post ranging from web standards (W3C), communication standards (IETF, ITU), and standards defining representation formats (e.g., JPEG, MPEG).

Perhaps you are wondering how such standards are created. In MPEG, for example and in a nutshell, new work items are proposed and discussed within the requirements subgroup, which typically issues a requirements document followed up by a call for proposal. The responses to this call are discussed and evaluated according to predefined criteria and adopted into a working draft. Once the working draft becomes mature, MPEG may decide to issue a Committee Draft (CD), which goes out to national bodies for ballot. If national bodies agree on the CD, which could include comments on how to improve it, the next stage would be Draft International Standard (DIS) followed up Final Draft International Standard (FDIS), each accompanied by a ballot including comments. At FDIS stage mainly yes|no vote is allowed and only pure editorial comments can be integrated before going to International Standard (IS), which is when the standard is finally published. [note: sometimes it's a bit more complicated but this is another story - for the interested reader, I've documented the process when working on MPEG-DASH here]

This may sound like a very boring process but it's also possible to win Engineering Emmy Awards like HEVC did very recently, where also Leonardo Chiariglione received the Charles F. Jenkins Lifetime Achievement Award (see his response to this award here). 

In this context, I often quote the following xkcd comic which shows two sides of the coin. First, the obvious one where one should indeed not create the 15th competing standards, which one may think it's easy but it isn't although there's also a positive aspect about this (see at the end of this blog post). Second, standards should only define the minimum to enable interoperability and leave out enough space for innovation and competition. However, it's not always clear from the beginning, where to draw the line in order to become a successful standard.
https://xkcd.com/927/
In the past couple of years I was heavily involved in the standardization of MPEG-DASH. In the beginning we've been in the situation with multiple competing formats (Adobe HDS, Apple HLS, Microsoft Smooth Streaming, etc.). MPEG-DASH was finally adopted by Adobe and Microsoft, leaving HLS as competing format/standard (i.e., informational RFC 8216) which now utilizes MPEG's Common Media Application Format (CMAF) to allow a common media segment format to be used by both DASH and HLS. Thus, we did not create the 15th competing standard and DASH/HLS/CMAF is an important step towards reducing market fragmentation although it's not yet the end of the path.

I'd like to conclude with two quotes related to standards. One is from one of my professor at university who was saying "if you have sleeping problems, read a standard", which is true - they are boring to read for an outsider - but it's exciting to work on standards as you basically define the path for future products and services. Finally, my favorite quote goes back to Andrew S. Tanenbaum's book on computer networks: "The nice thing about standards is that you have so many to choose from" which I interpret as a positive statement as competition leads to innovation which eventually leads to innovative products and services - that's what we want.

In this spirit: Happy World Standards Day!


Wednesday, September 13, 2017

Packet Video Workshop 2018

23rd Packet Video Workshop 2018
June 12, 2018, Amsterdam, The Netherlands
(co-located with ACM MMSys'18)

Workshop Co-Chairs
  • Ali C. Begen, Ozyegin University / Networked Media, Turkey (ali.begen at networked.media)
  • Christian Timmerer, Alpen-Adria-Universität Klagenfurt / Bitmovin Inc., Austria (christian.timmerer at itec.uni-klu.ac.at)
Workshop TPC Co-Chairs
  • Roger Zimmermann, National University of Singapore (NUS), Singapore (rogerz at comp.nus.edu.sg)
  • Thomas Schierl, Fraunhofer Heinrich Hertz Institute (HHI), Germany (thomas.schierl at hhi.fraunhofer.de)
The 23rd Packet Video Workshop (PV 2018) is devoted to presenting technological advancements and innovations in video and multimedia transmission over packet networks. The workshop provides a unique venue for people from the media coding and networking fields to meet, interact and exchange ideas. Its charter is to promote the research and development in both established and emerging areas of video streaming and multimedia networking. PV 2018 will be held in Amsterdam on June 12th. The workshop will be a single-track event and welcomes paper submissions from both cutting-edge research, and business and consumer applications. PV 2018 will be co-located with ACM MMSys, NOSSDAV, NetGames and MMVE.

PV 2018 seeks papers in all areas of media delivery over current IP and future networks. Authors are especially encouraged to submit papers with real-world experimental results and datasets.

Topics of interest include (but are not limited to)
  • Adaptive media streaming, and content storage, distribution and delivery
  • Network-distributed video coding and network-based media processing
  • Next-generation/future video coding, point cloud compression
  • Audiovisual communication, surveillance and healthcare systems
  • Wireless, mobile, IoT, and embedded systems for multimedia applications
  • Future media internetworking: information-centric networking and 5G
  • Immersive media: virtual reality (VR), augmented reality (AR), 360° video and multi-sensory systems, and its streaming
  • Machine learning in media coding and streaming systems
  • Standardization: DASH, MMT, CMAF, OMAF, MiAF, WebRTC, MSE, EME, WebVR, Hybrid Media, WAVE, etc.
  • Applications: social media, game streaming, personal broadcast, healthcare, industry 4.0, education, transportation, etc.
Important dates
  • Submission deadline: March 1, 2018
  • Acceptance notification: April 9, 2018
  • Camera-ready deadline: April 19, 2018

Submission instructions
Prospective authors are invited to submit an electronic version of full papers, in PDF format, up to six printed pages in length (double column ACM conference format) at the PV 2018 Web site. The authors are also encouraged to regularly check the PV 2018 web site for the latest information and updates. The proceedings will be published by ACM Digital Library.