Policy on Intellectual Property Right (IPR)
Annex 1 Description of assessment methods
1
Introduction
2
Common features
2.1
General viewing conditions
2.1.1
Laboratory environment
2.1.2
Home environment
2.1.3 Monitor
resolution
2.1.4 Monitor
contrast
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
6.1.1 General
arrangement
6.1.2 Selection
of test material
6.1.3 Test session
6.1.4 Types
of SS methods
6.2 Stimulus-comparison
methods
6.2.1 General
arrangement
6.2.2 The
selection of test material
6.2.3 Test
session
6.2.4 Types
of stimulus-comparison methods
6.3 Single
stimulus continuous quality evaluation (SSCQE)
6.3.1 Continuous
assessment of overall quality
6.3.2 Calibration
of continuous quality results and derivation of a single quality rating
6.4 Simultaneous
double stimulus for continuous evaluation (SDSCE) method
6.4.1 The
test procedure
6.4.2 The
different phases
6.4.3 Test
protocol features
6.4.4 Data
processing
6.4.5 Reliability
of the subjects
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 and transmission
conditions
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
2.2.1 Processing
of raw (uncompensated and/or unapproximated) data
2.2.2 Processing
of compensated and/or approximated data
2.3 Screening of
the observers
2.3.1 Screening
for DSIS, DSCQS and alternative methods except SSCQE method
2.3.2
Screening for SSCQE method
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
3.2.1
Description of the function
3.2.2
Estimation of the parameters of the approximation
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