QoE beyond the MOS: Added value using quantiles and distributions

Tobias Hoßfeld, Poul E. Heegaard, Martin Varela

Research output: Chapter in Book/Report/Conference proceedingConference article in proceedingsScientificpeer-review

14 Citations (Scopus)


Traditionally, Quality of Experience (QoE) assessment results (or objective estimations thereof) are presented as a single scalar value, typically a Mean Opinion Score (MOS). While useful, the limitations of MOS are evident even in its name; for many applications, just having a mean value is simply not enough. For service providers in particular, it would be more interesting to have an idea of how the scores are distributed, so as to ensure that a certain portion of the user population is experiencing satisfactory levels of quality, thus reducing churn. In this paper we propose different statistical measures to express important aspects of QoE beyond MOS like user diversity, uncertainty of user rating distributions, ratio of dissatisfied users. Further, we propose a way to use MOS values and the standard deviation of opinion scores (SOS) hypothesis, which postulates a quadratic relation between subjective scores and their standard deviation, in order to derive quantiles for subjective ratings.
Original languageEnglish
Title of host publicationQuality of Multimedia Experience (QoMEX), 2015 Seventh International Workshop on
PublisherIEEE Institute of Electrical and Electronic Engineers
ISBN (Electronic)978-1-4799-8958-4
Publication statusPublished - 6 Jul 2015
MoE publication typeA4 Article in a conference publication
Event7th International Workshop on Quality of Multimedia Experience, QoMEX 2015 - Costa Navarino, Greece
Duration: 26 May 201529 May 2015
Conference number: 7


Workshop7th International Workshop on Quality of Multimedia Experience, QoMEX 2015
Abbreviated titleQoMEX 2015
CityCosta Navarino


  • electronic mail
  • entropy
  • measurement uncertainty
  • quality assessment
  • standards
  • uncertainty
  • web pages


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