1 Scope
2 References
3 Definitions
3.1 Terms defined elsewhere
3.2 Terms defined in this Recommendation
4 Abbreviations and acronyms
5 Conventions
6 Selection of 360º source content
6.1 Source signals recordings
6.2 Spatial and temporal information
6.3 Exploratory information
6.4 Comfort and simulator sickness symptoms
6.5 Duration of stimuli
6.6 Audio considerations
7 Test methods
7.1 Test methods for audiovisual quality
7.2 Test methods for simulator sickness symptoms
7.3 Test methods for exploration behaviour
7.4 Methods to collect the observers' scores
8 Environment and equipment
8.1 Test environment
8.2 Equipment
9 Subjects
10 Experiment design
10.1 Inclusion of reference conditions within the experiment
10.2 Size of the experiment and subject fatigue
11 Experiment implementation
11.1 Informed consent
11.2 Viewer screening
11.3 Post-screening of subjects
11.4 Instructions and training
11.5 Experiment sessions and breaks
11.6 Questionnaire or interview
12 Data analysis
12.1 Calculate mean opinion score or differential mean opinion score
12.2 Analysis of exploration data
13 Elements of subjective test reporting
13.1 Documenting the test design
13.2 Documenting subjective testing
13.3 Data analysis
13.4 Additional information
Appendix I – Spatial and temporal information measurement for 360º video in the
spherical domain
Appendix II – Computation of sample size from statistical power
Appendix III – Recommendations for information sheet and consent form
Appendix IV – Sample instructions
Appendix V – Sample questionnaire for background data on subjects
Appendix VI – Analysis of exploration data
Bibliography