
From QoS Distributions to QoE Distributions: a System's Perspective
In the context of QoE management, network and service providers commonly...
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Confidence Interval Estimators for MOS Values
For the quantification of QoE, subjects often provide individual rating ...
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An Open source Implementation of ITUT Recommendation P.808 with Validation
The ITUT Recommendation P.808 provides a crowdsourcing approach for con...
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Describing Subjective Experiment Consistency by pValue PP Plot
There are phenomena that cannot be measured without subjective testing. ...
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Predicting Regression Probability Distributions with Imperfect Data Through Optimal Transformations
The goal of regression analysis is to predict the value of a numeric out...
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Probabilistic Logic Programming with BetaDistributed Random Variables
We enable aProbLoga probabilistic logical programming approachto r...
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Organic Fiducial Inference
A substantial generalization is put forward of the theory of subjective ...
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Generalized Score Distribution
A class of discrete probability distributions contains distributions with limited support, i.e. possible argument values are limited to a set of numbers (typically consecutive). Examples of such data are results from subjective experiments utilizing the Absolute Category Rating (ACR) technique, where possible answers (argument values) are {1, 2, ..., 5} or typical Likert scale {3, 2, ..., 3}. An interesting subclass of those distributions are distributions limited to two parameters: describing the mean value and the spread of the answers, and having no more than one change in the probability monotonicity. In this paper we propose a general distribution passing those limitations called Generalized Score Distribution (GSD). The proposed GSD covers all spreads of the answers, from very small, given by the Bernoulli distribution, to the maximum given by a Beta Binomial distribution. We also show that GSD correctly describes subjective experiments scores from video quality evaluations with probability of 99.7%. A Google Collaboratory website with implementation of the GSD estimation, simulation, and visualization is provided.
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