Tuesday, April 15, 2014

bitmovin: Junior / Senior C++ Software Engineer (m/f)

bitmovin GmbH is an Austrian start-up and research spin-off, providing industry leading over-the-top streaming solutions and cloud-based encoding systems which enable best-quality media experience for the user. Our team in Klagenfurt (Austria) is searching for a

Junior / Senior C++ Software Engineer (m/f)

to design and develop innovative software systems for multimedia and streaming purposes in
cloud-, Web- and mobile environments.

Our Offering:
  • Working in an innovative international team
  • Organisation with low hierarchy
  • Opportunity to make an impact to the whole multimedia industry
  • Worldwide customerbase
  • Modern office in the Lakeside Science and Technology Park in Klagenfurt
  • Salary above average & collective agreement, depending on qualification
Our Requirements:
  • University degree in Computer Science, Information Technology, etc. or equivalent education (HTL, College, etc.).
  • Junior: Basic knowledge on C++ software development
  • Senior: Several years of experience in C++ software development
  • Knowledge on design-patterns, frameworks, development- and test environments, Linux, etc.
Further details here. All jobs at bitmovin here.

Monday, April 14, 2014

Special Sessions at QoMEX 2014

QoMEX 2014 is inviting submissions to the following special sessions:
The purpose of these special sessions is to complement the regular program with new or emerging topics of particular interest to the community.

The submission deadlines and review process for papers in the special sessions are the same as for regular papers. To submit your contribution to a special session, follow the submission process for regular papers and select the session title as one of the paper’s topics.

Important dates:
  • Submission deadline: May 4, 2014
  • Notification of acceptance: June 15, 2014
  • Camera-ready papers: July 13, 2014
  • Workshop dates: September 18-20, 2014

Monday, March 24, 2014

PostDoc position (3 years) at Alpen-Adria-Universität Klagenfurt, Austria

Institute of Information Technology, Multimedia Communication (MMC) Group
(Prof. Hermann Hellwagner) 

The MMC group at Klagenfurt University, Austria, is offering a full, three-year PostDoc position (available now) in a basic research project called CONCERT (http://www.concert-project.org/). Important facts about the project are given in the following. We seek candidates with strong expertise in one or several of the following areas: Multimedia Communication, Machine Learning, Multi-Agent Systems, Uncertainty in Artificial Intelligence (Probabilistic Models, Bayesian Networks, Game Theory). Applications should be sent to Prof. Hermann Hellwagner <hermann.hellwagner@aau.at>.

Title: A Context-Adaptive Content Ecosystem Under Uncertainty (CONCERT)
Duration: 3 years

  • University College London (UK): Prof. George Pavlou, Dr. Wei Chai (Coordinator)
  • University of Surrey (UK): Dr. Ning Wang
  • Ecole Polytechnique Fédérale de Lausanne (CH): Prof. Pascal Frossard
  • Alpen-Adria-Universität (AAU) Klagenfurt (AT): Prof. Hermann Hellwagner 
Project character and funding

CONCERT is an international basic research project accepted as a CHIST-ERA project under the Call for Proposals “Context- and Content-Adaptive Communication Networks”. CHIST-ERA is an ERANET consortium, part of the EC FP7 Programme “Future and Emerging Technologies (FET)” (http://www.chistera.eu/). Funding is provided by the national basic research funding agencies, in Austria the FWF (Austrian Science Fund).


The objective of CONCERT is to develop a content ecosystem encompassing all rele- vant players which will be able to perform intelligent content and network adaptation in highly dynamic conditions under uncertainty. This ecosystem will have as basis emerging information-/content-centric networking technologies which support in- trinsic in-network content manipulation. The project will consider uncertainty aspects in the following two application domains: (1) social media networks based on user generated content and (2) CDN-like professional content distribution (Content Distri- bution Networks). Three dimensions of uncertainties will be addressed: (1) heteroge- neous and changing service requirements by end users, (2) threats that may have adverse impacts on the content ecosystem, as well as (3) opportunities that can be exploited by specific players in order to have their costs reduced.

In order to manage and exploit the uncertainty aspects, CONCERT defines a two- dimensional content and network adaptation framework that operates both cross- layer and cross-player. First, the decision on any single adaptation action needs to take into account context information from both the content application layer and the underlying network. Second, we consider joint content and network adaptation in order to simultaneously achieve optimised service performance and network re- source utilisation. Finally, some complex uncertainty scenarios require coordinated content and network adaptation across different ecosystem players. In this case, in- consistent or even conflicting adaptation objectives and different levels of context knowledge need to be reconciled and are key research issues.

In order to achieve adaptation solutions capable of coping with different uncertain- ties, the project will develop advanced learning, decision-making and negotiation techniques. Learning is required for deriving accurate system behavioural patterns according to the acquired context knowledge. This will then drive decision-making functions for taking the most appropriate adaptation actions to address these uncer- tainties. Negotiation techniques are required for resolving potential tussles between specific content/network adaptation objectives by different players in the content ecosystem. The project will consider both centralised and distributed approaches in which learning and decision-making processes on adaptation actions can be per- formed either at the central adaptation domain controller or in a decentralised man- ner across multiple network elements. In the latter case, emerging information- /content-centric networks will become much more intelligent, with content-aware devices performing self-adaptation according to their own context knowledge but through coordination in order to achieve global near-optimality and stability.

Tuesday, March 18, 2014

The Social Multimedia Experience

As of 2014, I'm taking over the IEEE Computer Social Computing column from John Riedl, who, sadly, passed away last year. The Social Computing column aims to explore the latest developments within the field from the point of view of both researchers and practitioners.

Topics of interest include, but are not limited to:
  • social networking services, applications, and tools;
  • social search;
  • social multimedia and social communications;
  • mobile social networks;
  • social network analysis and visualization;
  • standardization trends and federated social Web initiatives;
  • social computing business models; and
  • societal aspects such as privacy and data protection.
This column is part of the IEEE Computer Society’s Special Technical Community on Social Networking (STCSN) which aims to be the online portal for researchers and practitioners in social computing, social networking, and related fields, fostering communication and interaction among members of this rapidly growing global community. Further information about the STCSN and its goals and members are available at www.computer.org/stcsn. Come and join now!

The March 2014 issue is about

The Social Multimedia Experience

Friday, January 31, 2014

MPEG news: a report from the 107th meeting, San Jose, CA, USA

This blog post is also available at bitmovin tech blog and SIGMM records.

The MPEG-2 Transport Stream (M2TS; formally known as Rec. ITU-T H.222.0 | ISO/IEC 13818-1) has been awarded with the Technology & Engineering Emmy® Award by the National Academy of Television Arts & Sciences. It is the fourth time MPEG received an Emmy award. The M2TS is widely deployed across a broad range of application domain such as broadcast, cable TV, Internet TV (IPTV and OTT), and Blu-ray Disks. The Emmy was received during this year’s CES2014 in Las Vegas.

Plenary during the 107th MPEG Meeting.
Other topics of the 107th MPEG meeting in San Jose include the following highlights:
  • Requirements: Call for Proposals on Screen Content jointly with ITU-T’s Video Coding Experts Group (VCEG)
  • Systems: Committee Draft for Green Metadata
  • Video: Study Text Committee Draft for Compact Descriptors for Visual Search (CDVS)
  • JCT-VC: Draft Amendment for HEVC Scalable Extensions (SHVC)
  • JCT-3D: Proposed Draft Amendment for HEVC 3D Extensions (3D-HEVC)
  • Audio: 3D audio plans to progress to CD at 108th meeting
  • 3D Graphics: Working Draft 4.0 of Augmented Reality Application Format (ARAF) 2nd Edition
The official MPEG press release can be downloaded from the MPEG Web site. Some of the above highlighted topics will be detailed in the following and, of course, there’s an update on DASH-related matters at the end.

Call for Proposals on Screen Content

Screen content refers to content coming not from cameras but from screen/desktop sharing and collaboration, cloud computing and gaming, wirelessly connected displays, control rooms with high resolution display walls, virtual desktop infrastructures, tablets as secondary displays, PC over IP, ultra-thin client technology, etc. Also mixed-content is within the scope of this work item and may contain a mixture of camera-captured video and images with rendered computer-generated graphics, text, animation, etc.

Although this type of content was considered during the course of the HEVC standardization, recent studies in MPEG have led to the conclusion that significant further improvements in coding efficiency can be obtained by exploiting the characteristics of screen content and, thus, a Call for Proposals (CfP) is being issued for developing possible future extensions of the HEVC standard.

Companies and organizations are invited to submit proposals in response to this call –issued jointly by MPEG with ITU-T VCEG. Responses are expected to be submitted by early March, and will be evaluated during the 108th MPEG meeting. The timeline is as follows:

  • 2014/01/17: Final Call for Proposals
  • 2014/01/22: Availability of anchors and end of editing period for Final CfP
  • 2014/02/10: Mandatory registration deadline
    One of the contact persons (see Section 10) must be notified, and an invoice for the testing fee will be sent after registration. Additional logistic information will also be sent to proponents by this date.
  • 2014/03/05: Coded test material shall be available at the test site. By this date, the payment of the testing fee is expected to be finalized.
  • 2014/03/17: Submission of all documents and requested data associated with the proposal.
  • 2014/03/27-04/04: Evaluation of proposals at standardization meeting.
  • 2015: Final draft standard expected.
It will be interesting to see the coding efficiency of the submitted proposals compared to a pure HEVC or even AVC approach.

DEC PDP-8 at Computer History
Museum during MPEG Social Event.
Committee Draft for Green Metadata

Green Metadata, formerly known as Green MPEG, shall enable energy-efficient media consumption and reached Committee Draft (CD) status at the 107th MPEG meeting. The representation formats defined within Green Metadata help reducing decoder power consumption and display power consumption. Clients may utilize such information for the adaptive selection of operating voltage or clock frequencies within their chipsets. Additional, it may be used to set the brightness of the backlights for the display to save power consumption.

Green Metadata also provides metadata for the signaling and selection of DASH representations to enable the reduction of power consumption for their encoding.

The main challenge in terms of adoption of this kind of technology is how to exploit these representation formats to actually achieve energy-efficient media consumption and how much!

What’s new on the DASH frontier?

The text of ISO/IEC 23009-1 2nd edition PDAM1 has been approved which may be referred to as MPEG-DASH v3 (once finalized and integrated into the second edition, possibly with further amendments and corrigenda, if applicable). This first amendment to MPEG-DASH v2 comprises accurate time synchronization between server and client for live services as well as a new profile, i.e., ISOBMFF High Profile which basically combines the ISOBMFF Live and ISOBMFF On-demand profiles and adds the Xlink feature.

Additionally, a second amendment to MPEG-DASH v2 has been started featuring Spatial Relationship Description (SRD) and DASH Client Authentication and Content Access Authorization (DAA).

Other DASH-related aspects include the following:

  • The common encryption for ISOBMFF has been extended with a simple pattern-based encryption mode, i.e., a new method which should simply content encryption.
  • The CD has been approved for the carriage of timed metadata metrics of media in ISOBMFF. This allows for the signaling of quality metrics within the segments enabling QoE-aware DASH clients.

What else? That is, some publicly available MPEG output documents… (Dates indicate availability and end of editing period, if applicable, using the following format YY/MM/DD):

  • Report of 3D-AVC Subjective Quality Assessment (14/02/28)
  • Working Draft 3 of Video Coding for Browsers (14/01/31)
  • Common Test Conditions for Proposals on VCB Enhancements (14/01/17)
  • Study Text of ISO/IEC CD 15938-13 Compact Descriptors for Visual Search (14/02/14)
  • WD 4.0 of ARAF 2nd Edition (14/02/07)
  • Text of ISO/IEC 23001-7 PDAM 1 Simple pattern-based encryption mode (14/01/31)
  • Text of ISO/IEC CD 23001-10 Carriage of Timed Metadata Metrics of Media in the ISO Base Media File Format (14/01/31)
  • Text of ISO/IEC CD 23001-11 Green Metadata (14/01/24)
  • Preliminary Draft of ISO/IEC 23008-2:2013/FDAM1 HEVC Range Extensions (14/02/28)
  • Text of ISO/IEC 23008-2:2013/DAM3 HEVC Scalable Extensions (14/01/31)
  • Preliminary Draft of ISO/IEC 23008-2:2013/FDAM2 HEVC Multiview Extensions (14/02/28)
  • Text of ISO/IEC 23008-2:2013/PDAM4 3D Extensions (14/03/14)
  • Text of ISO/IEC CD 23008-12 Image File Format (14/01/17)
  • Text of ISO/IEC 23009-1:201x DCOR 1 (14/01/24)
  • Text of ISO/IEC 23009-1:201x PDAM 1 High Profile and Availability Time Synchronization (14/01/24)
  • WD of ISO/IEC 23009-1 AMD 2 (14/01/31)
  • Requirements for an extension of HEVC for coding of screen content (14/01/17)
  • Joint Call for Proposals for coding of screen content (14/01/22)
  • Draft requirements for Higher Dynamic Range (HDR) and Wide Color Gamut (WCG) video coding for Broadcasting, OTT, and Storage Media (14/01/17)
  • Working Draft 1 of Internet Video Coding (IVC) (14/01/31)


Dr. Christian Timmerer
Alpen-Adria-Universität Klagenfurt | christian.timmerer@aau.at
CIO bitmovin GmbH | christian.timmerer@bitmovin.net

Tuesday, January 28, 2014

bitmovin searching for software engineers, Web developers, internships

bitmovin GmbH is providing industry leading over the top streaming solutions and server encoding systems, enabling best-quality media experience for the user. Our main expertise is technology related to cutting-edge standards and multimedia technologies, which is the basis for our cloud-based transcoding services and high-quality client products. As part of our expansion we are looking for additional employees to support our team in our offices in Klagenfurt (Austria):
Further information can be found here.

We look forward to your application (CV, references and photo) via e-mail to jobs@bitmovin.net.

bitmovin GmbH
Lakeside B01
9020 Klagenfurt | Austria | Europe
T +43 463 27008747
E office@bitmovin.com


Wednesday, January 8, 2014

Call for Papers: QoMEX 2014

6th International Workshop on Quality of Multimedia Experience
Singapore, 18-20 Sept. 2014

The sixth International Workshop on Quality of Multimedia Experience (QoMEX) will bring together leading experts from academia and industry interested in evaluating multimedia quality and user experience. Coming to Asia for the first time, QoMEX 2014 will be held in Singapore, conveniently located adjacent to InterSpeech and MMSP.

Prospective organizers of special sessions are invited to submit proposals as per the guidelines on the web site. Prospective authors are invited to prepare full (six pages) and/or short (two pages) papers. Furthermore, authors of recent journal papers will have the opportunity to present their work as a poster. Please refer to the workshop web site (www.qomex2014.org) for more details. Proceedings will be published in the IEEE Xplore digital library (pending).


QoE Fundamentals: Understanding experience and quality formation; alternatives to MOS; quality vs. user satisfaction vs. acceptance; crowdsourcing studies; long-term quality measurement; physiological QoE assessment; emotions & QoE.

Audio/Visual User Experience: Objective/subjective quality evaluation of speech, audio, video, multimedia; spatial/3D audio and stereo/multi-view video quality; psycho-physical modeling; quality-centered processing, compression and transmission; perceptual optimization.

QoE in Graphics & Rendering: High-dynamic range imaging; (non-)photorealistic rendering; object/texture/motion modeling; special effects; virtual/augmented/mixed realities, games.

Sensory User Experiences: Methods for sensory user feedback; quality metrics for ambient and sensory experiences; novel sensory interfaces; multisensory interaction.

Interactive Systems QoE: Tele-conferencing/tele-presence; multimedia-based group inter-action; gaming; multimedia Web search/browsing; e-commerce; social media applications.

QoE for Mobile Devices: Evaluating multimedia applications and interactive experiences on mobile devices; impact of viewing conditions and device properties; adaptive user interfaces.

QoE-centric Network and Application Management: Distributed and central management approaches; cloud-based multimedia services; adaptive media streaming; link between QoS and QoE; interoperability; performance optimization; pricing and service-level agreements.

Reproducible QoE Research: Multimedia databases/datasets; benchmarking and certification; testing conditions and methods; standardization efforts; open-source QoE tools.


Special session proposals:
Submission deadline: 23 February 2014
Notification of acceptance: 9 March 2014

Full & short papers:
Submission deadline: 4 May 2014
Notification of acceptance: 15 June 2014
Camera-ready submission: 13 July 2014

Journal paper presentations:
Submission deadline: 29 June 2014
Notification of acceptance: 13 July 2014


General Chair
Stefan Winkler, ADSC/UIUC

General Co-Chair
Susanto Rahardja, NUS

Technical Program Chairs
Weisi Lin, NTU
Alexander Raake, TU Berlin
Zhou Wang, Univ. Waterloo

Special Session Chair
Luigi Atzori, Univ. Cagliari

Steering Committee
Loretta Anania, EC
Ian Burnett, RMIT
Touradj Ebrahimi, EPFL/NTNU
Khaled El-Maleh, Qualcomm
Lina Karam, ASU
Patrick Le Callet, Univ. Nantes
Sebastian Mˆller, TU Berlin
Fernando Pereira, IST-IT
Andrew Perkis, NTNU
Amy Reibman, AT&T Labs
Peter Schelkens, iMinds/VUB
Christian Timmerer, AAU

Publicity Chairs
Guangtao Zhai, SJTU
Margaret Pinson, NTIA

Finance Chair
Pina Marziliano, NTU

Local Arrangements Chairs
Lai-Tee Cheok, SMU
Ngai-Man Cheung, SUTD

ACM SIGGRAPH Singapore Chapter
IEEE Singapore Section Signal Processing Chapter