Delft Image Quality Lab
 

IQ Lab
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Introduction
People

 

Resources
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A&A_dataset: The Aesthetics and visual Attention image dataset
EMMA: Database for emotion and mood recognition
i_QoE: A database for individual QoE analysis
SA-IQ: Semantic Aware Image Quality dataset
Perceived Ringing
Eye-Tracking Release 1
Eye-Tracking Release 2
Interactions
Video Task Effect

i_QOE

We kindly request you to cite the following paper in any published work if you use this dataset.

Zhu, Yi, Ingrid Heynderickx, and Judith A. Redi. "Understanding the role of social context and user factors in video Quality of Experience." Computers in Human Behavior 49 (2015): 412-426.

If you have any questions about the dataset that are not covered in this description, please feel free to email Y.Zhu_1@tudelft.nl with your query.


Motivation and Background

Recently, a lot of effort has been devoted to estimating users' Quality of Experience (QoE) in order to optimize video delivery. So far, subjective (and objective, as a consequence) QoE assessment has been mostly associated to the perceptual quality of the video (i.e., asking users to self-report their perceptual satisfaction with respect to a set of multimedia contents), neglecting other QoE aspects, such as enjoyment or endurability. In addition, it is common practice in QoE research to target the average of user opinion scores gathered from subjective tests (also known as Mean Opinion Score, MOS). This approach does not take into account the dependency of QoE on individual characteristic, such as gender effects or personality, which are also known to influence user's QoE. As a result, there is a lack of publicly available QoE datasets (1) targeting other aspects of QoE besides perceptual quality and (2) providing individual subjective QoE ratings as well as corresponding individual user characteristics (e.g., gender, personality).

We present here a dataset to address the above issues. The i_QoE dataset can be used for analyzing individual Quality of Experience in its many aspects, beyond perceptual quality only.

Dataset summary

The i_QoE dataset is based on an empirical study. For a full description of the experiment and its setup, please check the paper referenced above.

Six different videos covering three genres (i.e., comedy, sports, education) were further encoded at two bitrate levels (i.e., 600kbps and 2000kbps) to enforce different perceived quality levels. Sixty participants were involved in this study. They were split into two disjoint groups: the 30 participants of one group watched all videos by themselves, whereas the 30 participants in the second group watched all videos with two friends (so, in groups of three; interaction among them was allowed).

Before starting the experiment, participants were asked to fill in some questionnaires investigating personal information, such as the level of interest they had (a priori) in the video genres they were about to see, their immersive tendency, nationality, gender as well as their personality. After filling in the personal data questionnaire, participants watched one of the two versions (i.e., 600 or 2000 kbps) of each video, for all six videos. Bitrate levels as well as video order were counterbalanced across participants to guarantee that each participant would witness a similar range of perceived quality, and to avoid fatigue and learning effects.

For each video, participants scored their QoE in terms of enjoyment, endurability, satisfaction, involvement and perceived visual quality via a QoE questionnaire. All aspects (excluding Perceived Quality) were quantified by means of 4 questions each to be answered on a 7-point likert scale. Perceived video quality was instead measured through 2 questions (i.e., one for the annoyance of artifacts, and another one for the overall video quality) to be rated on a 5-point scale, according to the ITU-R BT.500 (2002) specification.

File list

The dataset consists of three excel files and one pdf file:

1. VideoInfo: The information related to the six videos used in this dataset.

2. UserCharactristics: The individual characteristics information of all participants, including information on gender and personality.

3. UserRating: All QoE ratings that participants gave after watching each test video.

4. QoE_Questionnaire: The questionnaire used to measure Quality of Experience in our study.

Download information

The database can be downloaded here. The files are password protected. To get the password you can contact Yi Zhu (Y.Zhu-1@tudelft.nl)

Due to the copyright issue, the test video files are password protected. To obtain them, please contact Yi Zhu.

This research group is part of the Multimedia Computing Group based in the Technical University of Delft
For questions or comments regarding this page, please contact Yi Zhu