RECOMMENDATION ITU-R BT.500-11 - Methodology for the subjective assessment of the quality ...
ANNEX 1 - Description of assessment methods
1 Introduction
2 Common features
    2.1 General viewing conditions
    2.2 Source signals
    2.3 Selection of test materials
    2.4 Range of conditions and anchoring
    2.5 Observers
    2.6 Instructions for the assessment
    2.7 The test session
    2.8 Presentation of the results
3 Selection of test methods
4 The double-stimulus impairment scale (DSIS) method (the EBU method)
    4.1 General description
    4.2 General arrangement
    4.3 Presentation of the test material
    4.4 Grading scales
    4.5 The introduction to the assessments
    4.6 The test session
5 The double-stimulus continuous quality-scale (DSCQS) method
    5.1 General description
    5.2 General arrangement
    5.3 Presentation of the test material
    5.4 Grading scale
    5.5 Analysis of the results
    5.6 Interpretation of the results
6 Alternative methods of assessment
    6.1 Single-stimulus (SS) methods
    6.2 Stimulus-comparison methods
    6.3 Single stimulus continuous quality evaluation (SSCQE)
    6.4 Simultaneous double stimulus for continuous evaluation (SDSCE) method
    6.5 Remarks
APPENDIX 1 TO ANNEX 1 - Picture-content failure characteristics
1 Introduction
2 Deriving the failure characteristic
3 Use of the failure characteristic
APPENDIX 2 TO ANNEX 1 - Method of determining a composite failure characteristic for programme content ...
1 Introduction
2 Programme-content analysis
3 Transmission-channel analysis
4 Derivation of composite failure characteristics
APPENDIX 3 TO ANNEX 1 - Contextual effect
ANNEX 2 - Analysis and presentation of results
1 Introduction
2 Common methods of analysis
    2.1 Calculation of mean scores
    2.2 Calculation of confidence interval
    2.3 Screening of the observers
3 Processing to find a relationship between the mean score and the objective measure of a picture distortion
    3.1 Approximation by a symmetrical logistic function
    3.2 Approximation by a non-symmetrical function
    3.3 Correction of the residual impairment/enhancement and the scale boundary effect
    3.4 Incorporation of the reliability aspect in the graphs
4 Conclusions
ANNEX 3 - Description of a common inter-change data file format