Rec. ITU-T P.917 (01/2019) - Subjective test methodology for assessing impact of initial loading delay on quality of experience
Summary
History
FOREWORD
Table of Contents
Introduction
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 Background
7 Factors influencing user behaviour and ratings
     7.1 Test platform
     7.2 Source content
          7.2.1 Genres
          7.2.2 Characteristics and length
     7.3  Test conditions
          7.3.1 Types of degradations
          7.3.2 Resolutions, codecs and codec settings
          7.3.3 Reference conditions
     7.4 Assignment of SRCs to HRCs
     7.5 Overall test procedure
          7.5.1 Subject screening
          7.5.2 Instructions
          7.5.3 Length of test and sessions
          7.5.4 Training procedure
          7.5.5 Main test procedure
               7.5.5.1 Video overview/browsing
               7.5.5.2 Initial loading period
               7.5.5.3 Video playing
               7.5.5.4 Rating schemes
                    7.5.5.4.1 Required rating questions
                    7.5.5.4.2 Optional rating questions
               7.5.5.5 Content rating procedure
               7.5.5.6 Optional questionnaire
     7.6 Subjective test environment and set-up
          7.6.1 Common properties
          7.6.2 PC tests
               7.6.2.1 Test environment
               7.6.2.2 Display specification and set-up
               7.6.2.3 Viewing distance
               7.6.2.4 Viewing conditions
               7.6.2.5 Listening conditions
          7.6.3 Mobile equipment tests
               7.6.3.1 Test environment
               7.6.3.2 Device specification and set-up
               7.6.3.3 Viewing distance
               7.6.3.4 Viewing conditions
               7.6.3.5 Device settings
               7.6.3.6 Listening conditions
     7.7 Subjects and subjective test control
          7.7.1 Number of subjects
          7.7.2 Subject screening
          7.7.3 General instructions for subjects
Appendix I  Example instructions to subjects
Appendix II  Test questionnaire
Appendix III  Pilot test on the impact of initial loading delays
Bibliography