Towards context-aware interactive Quality of Experience evaluation for audiovisual multiparty conferencing

Marwin Schmitt, Judith Redi, P.S. Cesar Garcia

Research output: Chapter in Book/Conference proceedings/Edited volumeConference contributionScientificpeer-review


In modern video conferencing services, just as in commonvideo delivery, most of the resource optimization is taken careof in the codec layer. Modern codecs like H.264 use detailedperceptual models to optimize the data reduction in way that itis least noticed by us. Already early evaluations oftelecommunication systems could establish that there aredifferent thresholds for a good quality depending on thesituation. It is further known that subjective quality perceptionsvary from user to user. But the space of user and context factorsis still largely unexplored. To gain insight in which parametersare key in differentiating quality perception, we need to explorethe interaction in different situations while keeping a tightcontrol over the system parameters. In this paper we explorehow clustering participants by their interaction or ratingbehavior can reveal subgroups that show significantly differentperception of the QoE delivered by the same videoconferencingsystem. While for a cluster of users we find video quality toinfluence other QoE dimensions such as audio, for anothercluster this is not the case. We explore whether this effect is dueto conversational dynamics (contextual factor) or individualpreferences (user factor) and discuss what this would mean forthe design of future video-conferencing systems, that want todynamically adapt to situation and participants.
Original languageEnglish
Title of host publicationPQS 2016
Subtitle of host publication5th ISCA/DEGA Workshop on Perceptual Quality of Systems
Number of pages5
Publication statusPublished - 2016
EventPQS 2016: 5th ISCA/DEGA Workshop on Perceptual Quality of Systems - Berlin, Germany
Duration: 29 Aug 201631 Aug 2016


ConferencePQS 2016
Internet address


  • QoE
  • multiparty
  • audiovisual conferencing
  • contextual factors
  • human influence factors


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