Logo TU Ilmenau

You are here


Audiovisual Technology Group

The Audiovisual Technology group is part of the Institute of Media Technology at TU Ilmenau. It is headed by Prof. Dr.-Ing. Alexander Raake, recently succeeding Prof. Dr.-Ing. Hans-Peter Schade. Before, Prof. Raake was the head of the research group Assessment of IP-based Applications at Technische Universität Berlin, a group established in 2009.

The Audiovisual Technology Group (AVT) deals with the function, application and perception of audio and video equipment and systems. An essential focus of the research is on the relationship between the technical characteristics of audio, video and audiovisual systems and human perception and experience (“Quality of Experience”, QoE). The group conducts research on user perception, performance and cognitive models for multi-media applications and services, with a special focus on networked applications and services (Voice over IP, IPTV, media streaming), or networked multi-channel audio conferencing or audio reproduction. In this context, the group develops new perceptive test and assessment methods as well as instrumental models for automatic prediction of human perception or performance. As part of the Institute of Media Technology, the Audiovisual Technology Lab disposes of a cutting-edge laboratory space enabling high-quality audio and video capturing and rendering as well as extensive audio and audiovisual tests.

Aspects of the entire chain are considered, from production, recording, transmission, reproduction, perception and experience for voice, audio and video signals and accompanying metadata. Current research relates to the possibilities offered by converged, IP-based networks for new multimedia services, as well as immersive audiovisual technologies such as UHD/4k and 360° video or spatial audio based on sound field synthesis.

Creation - Technology - Perception [nach Raake & Egger, in Raake & Möller, 2014]

Award for P. Lebreton and A. Raake at ICME 2017

Dr. Pierre Lebreton (former TU Ilmenau, now Zhejiang Universitiy, China) and Prof. Dr. Alexander Raake got the "Award for Best Head Movement Prediction" at the IEEE International Conference on Multimedia and Expo (ICME) 2017 in Hong Kong.

P.NATS Phase 1 - TU Ilmenau part of all winning groups

Building blocks of the ITU-T P.1203 model

The International Telecommunication Union - Telecommunication Standardization Sector (ITU-T) has recently published the P.1203 series of recommendations. This standard is the first which allows to measure the quality of different streaming services such as YouTube, Netflix etc. The standardized models were developed in a competition within the ITU-T Study Group 12 (SG12) which was previously referred to as the P.NATS (Parametric Non-intrusive Assessment of TCP-based multimedia Streaming quality) consisting of seven participating companies. The standardized models are available in four modes of operation depending on the different levels of media-related information used for analysis which in turn reflect the different types of media stream encryption. The models are developed to assess the quality of streaming services up to HD resolution. A modular model framework has been used to develop the models. This modular architecture is as shown in the figure.

TU Ilmenau in collaboration with Deutsche Telekom has been part of the winning groups for all the four modes.


Raake, A., Garcia, M.N., Robitza, W., List, P., Göring, S. and Feiten, B., 2017, May.
A bitstream-based, scalable video-quality model for HTTP adaptive streaming: ITU-T P. 1203.1.
In Quality of Multimedia Experience (QoMEX), 2017 Ninth International Conference on (pp. 1-6). IEEE.

Robitza, W., Garcia, M.N. and Raake, A., 2017, May.
A modular HTTP adaptive streaming QoE model—Candidate for ITU-T P. 1203 (“P. NATS”). In Quality of Multimedia Experience (QoMEX), 2017 Ninth International Conference on (pp. 1-6). IEEE.

Links to the standardization documents:
1) [Recommendation P.1203] -
2) [P.1203.1] -
3) [P.1203.2] -
4) [P.1203.3] -

Other links:

QoMEX 2017

In May 2017, the Audiovisual Technology Group of TU Ilmenau organized the 9th International Conference QoMEX 2017 in Erfurt. The conference brought together leading experts from academia and industry to present and discuss current research on multimedia quality, Quality of Experience (QoE) and user experience.

More information is available on the website:

Group Assessment of IP-based Applications at TU Berlin

Prof. Raake’s previous research group at TU Berlin: Assessment of IP-based Applications (AIPA)

The book "Quality of Experience" appeared in 2014. Alexander Raake is the co-editor, and many other former members of the AIPA team are co-authors of different chapters. The book:

  • develops the definition of "Quality of Experience" for telecommunication services and applies it to various fields of communication and media technology
  • provides examples and guidelines for many fields of application
  • • was written by well-known experts in the field

Information at Springer-Verlag