Prof. Dr. Ulrich Reiter

Parts of Books

• Factors Influencing Quality of Experience
  Reiter, U., Brunnström, K., de Moor, K., Larabi, M-C, Pereira, M., Pinheiro, A., You, J., Zgank, A., 2014, Hg.: Springer Verlag. In: Quality of Experience: Advanced Concepts, Applications and Methods. Eds. S. Möller and A. Raake. DOI 10.1007/978-3-319-02681-7_4
  In this chapter different factors that may influence Quality of Experience (QoE) in the context of media consumption, networked services, and other electronic communication services and applications, are discussed.
  Factors Influencing Quality of Experience
• Temporal Development of Quality of Experience
  Weiss, B., Guse, D., Möller, S., Raake, A., Borowiak, A., Reiter, U., 2014, Hg.: Springer Verlag. In: Quality of Experience: Advanced Concepts, Applications and Methods. Eds. S. Möller and A. Raake. DOI 10.1007/978-3-319-02681-7_10
  Most research on Quality of Experience treats QoE as a static event. As a result, QoE is measured for stimuli of delimited length, and the QoE which is associated with the stimulus is considered to be stable along its duration. However, this rarely happens in reality where usage episodes extend over several seconds and minutes (e.g. a phone call), hours (e.g. a video film), or regularly over periods of weeks or months (when considering QoE of a subscribed service). In this chapter we discuss the cognitive processes involved when QoE is integrated over usage episodes, and describe corresponding assessment methods. We also review models for estimating episodic and multi-episodic QoE from momentary QoE judgments or their predictions.
  Temporal Development of Quality of Experience
• Perceived Quality in Game Audio
  Reiter, U., 2010, Hg.: IGI Global. In: Game Sound Technology and Player Interaction: Concepts and Developments. Ed. M. Grimshaw.
  This chapter reviews game audio from a Quality of Experience point of view. It describes cross-modal interaction of auditory and visual stimuli, re-introduces the concept of plausibility, and discusses issues of interactivity and attention as the basis for the qualitative, high-level salience model being suggested here. The model is substantiated by experimental results indicating that interaction or task located in the audio domain clearly influences the perceived audio quality. Cross-modal influence, with interaction or task located in a different (for example, visual) domain, is possible, but is significantly harder to predict and evaluate.
  Perceived Quality in Game Audio
• Quality of Experience for High Definition Presentations - Case: Digital Cinema
  Perkis, A., Rahayu, F.N., Reiter, U., You, J., Ebrahimi, T., 2010, Hg.: Springer Verlag. In: High-Quality Visual Experience: Creation, Processing and Interactivity of High-resolution and High-dimensional Video Signals.
  

Peer-reviewed Journal Publications

• Measuring momentary QoE: User sensitivity to audio quality changes under different presentation conditions
  Borowiak, A., Reiter, U., Svensson, U.P., April 2014, Hg.: Journal of the Audio Engineering Society Volume 62 Issue 4 pp. 235-243
  Subjective evaluation of audio, video, and audiovisual material is typically performed in a static manner, after the sample has finished. This way, the possible temporal variability of the stimulus quality and its impact on quality perception are ignored. In this study, a new technique for momentary quality assessment was used in order to investigate the effect of content coherence/continuity as well as the influence of video stream on audio quality preferences. Obtained results show that the quality requirements are lower when the presented material is played in a continuous manner than when the same clip is cut into segments that are reproduced in a random order with short pauses in between. This may mean that subjective studies that use short audio stimuli extracted from long-duration content generate results that exaggerate the actual quality needs of consumers. Moreover, it has been shown that subjects’ quality preferences are higher when audio is played without the presence of an accompanying visual stimulus.
  Momentary Quality of Experience: Users' Audio Quality Preferences Measured Under Different Presentation Conditions
• Quality Evaluation of Long Duration AV Content – An Extended Analysis Using a Novel Assessment Methodology
  Borowiak, A., Reiter, U., April 2014, Hg.: Journal of Multimedia Tools and Applications, DOI 10.1007/s11042-014-1920-7
  
  Quality Evaluation of Long Duration AV Content – An Extended Analysis Using a Novel Assessment Methodology
• Audio Quality Requirements and Comparison of Multimodal vs. Unimodal Perception of Impairments for Long Duration Content
  Borowiak, A., Reiter, U., Svensson, U.P., Jan. 2014, Hg.: Journal of Signal Processing Systems. Vol. 74, No. 1, pp. 79–89. DOI 10.1007/s11265-013-0777-8
  
  Audio Quality Requirements and Comparison of Multimodal vs. Unimodal Perception of Impairments for Long Duration Content
• Comparing apples and oranges: assessment of the relative video quality in the presence of different types of distortions
  Reiter, U., Korhonen, J., You, J., Sep. 2011, Hg.: EURASIP Journal on Image and Video Processing. Vol. 2011, No. 8.
  
  Comparing apples and oranges: assessment of the relative video quality in the presence of different types of distortions
• Congestion control in wireless links based on selective delivery of erroneous packets
  Korhonen, J., Perkis, A., Reiter, U., Feb. 2011, Hg.: Signal Processing: Image Communication. Vol. 26, No. 2, Elsevier.
  
  Congestion control in wireless links based on selective delivery of erroneous packets
• Perceptual-based Quality Assessment for Audio-visual Services - A Survey
  You, J., Reiter, U., Hannuksela, M., Gabbouj, M., Perkis, A., Aug. 2010, Hg.: Signal Processing: Image Communication. Vol. 25, No. 7, Elsevier.
  
  Perceptual-based Quality Assessment for Audio-visual Services - A Survey

• Senior Member, IEEE
  
• Member of the Audio Engineering Society (AES)
  
• Mitglied der Fernseh- und Kinotechnischen Gesellschaft (FKTG)
  

• IEEE CE Soc Distinguished Lecturer 2013-2014
  IEEE Consumer Electronics Society
• QoMEX 2010 Best Paper Award
  International Workshop on Quality of Multimedia Experience (QoMEX)
• IEEE International Symposium on Consumer Electronics 2007 Best Paper Award
  IEEE Consumer Electronics Society
• IEEE International Symposium on Consumer Electronics 2005 Best Paper Award
  IEEE Consumer Electronics Society