Content for TR 26.861 Word version: 15.0.0
4 Perceptual Audio Quality Attributes for Immersive Audio
5 Considerations on Test Methodologies for Immersive Audio Systems
$ Change history
4 Perceptual Audio Quality Attributes for Immersive Audio p. 7
4.1 Overview p. 7
4.2 Considerations on quality attributes for assessing immersive audio systems. p. 7
4.2.1 Input provided in S4-170836 - Test Methodology for the Assessment of Audio Systems p. 7
4.2.1.1 Proposal of relevant perceptual quality attributes p. 7
4.2.1.2 Listening Test Methodology p. 7
4.2.1.3 Experiments with Absolute Category Rating p. 7
4.2.1.4 Possibilities with Comparative Listening Tests p. 7
4.2.1.5 Conclusions p. 9
4.2.1.6 References p. 9
4.2.2 Input provided in S4-170914 - On Audio Quality Attributes p. 9
4.2.2.1 Introduction p. 9
4.2.2.2 Audio Quality Attribute Elicitation p. 9
4.2.2.3 The Sound Quality Wheel p. 10
4.2.2.4 Proposals on Quality Attributes for Audio Capture Tests p. 11
4.2.2.5 Quality Dimensions for Audio Coding and Transmission Tests p. 11
4.2.2.6 References p. 12
4.2.2.7 Appendix A p. 13
4.2.3 Input provided in S4-171225 - On Spatial Audio Quality Assessment p. 13
4.2.3.1 Introduction p. 13
4.2.3.2 On audio attributes and categories p. 13
4.2.3.2.1 Audio attributes in ITU-R recommendations p. 13
4.2.3.2.2 Audio attributes and categories from a lexical study p. 14
4.2.3.2.3 Attributes related to binaural rendering p. 15
4.2.3.3 On subjective test methodologies p. 15
4.2.3.3.1 Choice of listening instrument: loudspeakers vs. headphones p. 15
4.2.3.3.2 Methodology used to evaluate the binaural rendering of different audio capture systems p. 16
4.2.3.3.3 Extended MUSHRA methodology with anchors to cover multiple degradations/categories p. 16
4.2.3.4 Conclusion p. 17
4.2.3.5 References p. 17
4.2.4 Input provided in S4-180125 - On Auditory Assessment of Audio Systems p. 17
4.2.4.1 Introduction p. 17
4.2.4.2 Listening Test Material p. 17
4.2.4.3 Listening Test Methodology and Environment p. 18
4.2.4.4 Results p. 18
4.2.4.4.0 General p. 18
4.2.4.4.1 Postprocessing of Votes p. 18
4.2.4.4.2 Mapping to absolute scale p. 20
4.2.4.4.3 Predictability of overall quality p. 21
4.2.4.5 Conclusions p. 21
4.2.4.6 References p. 22
4.2.5 Input provided in S4-180144 - High Dimensional Assessment of Spatial Audio Quality p. 22
4.2.5.1 Abstract p. 22
4.2.5.2 Perceptual attributes of spatial audio p. 22
4.2.5.3 Adaptive audio (ADA) test methodology p. 23
4.2.5.4 Suitability analysis of ADA methodology p. 25
4.2.5.4.1 ADA in free-field listening environments p. 25
4.2.5.4.2 Analysis of free-field listening environments p. 27
4.2.5.5 Applicability of ADA p. 28
4.2.5.6 References p. 30
4.3 Quality attributes of relevance for 3GPP immersive audio systems p. 30
5 Considerations on Test Methodologies for Immersive Audio Systems p. 30
5.1 Input provided in S4-180464 - On the validity of the CIBR baseline testing for VR Stream p. 30
5.1.1 Summary p. 30
5.1.2 Introduction p. 31
5.1.3 Comparison Category Rating Tests for Reference Renderer p. 31
5.1.3.1 Test design p. 31
5.1.3.1.1 Test Material p. 31
5.1.3.1.2 HRTF Selection p. 33
5.1.3.1.3 Listeners p. 33
5.1.3.1.4 Test Description, Interface and Randomization p. 33
5.1.3.2 Results p. 34
5.1.3.3 Conclusion and Proposal p. 35
5.1.3.4 References p. 36
5.2 Input provided in S4-180520 - On the impact of individualized HRTF and HpTF p. 36
5.2.1 Summary p. 36
5.2.2 Introduction p. 36
5.2.3 Test Methodology p. 36
5.2.3.1 Goal of the Experiment p. 36
5.2.3.2 Listening Experiment Paradigm p. 36
5.2.3.3 Test Environment p. 37
5.2.3.4 HpIR Measurement & Compensation Filter Generation p. 38
5.2.3.5 BRIR Measurement p. 39
5.2.3.6 Test and Reference Conditions generation p. 39
5.2.3.6.1 Source Material p. 39
5.2.3.6.2 Test Conditions p. 40
5.2.3.6.3 Reference Conditions p. 40
5.2.3.6.4 Test and Reference Conditions Naming Convention p. 40
5.2.3.7 Training Session p. 41
5.2.3.8 Listening Session p. 42
5.2.4 Participants p. 43
5.2.5 Results p. 43
5.2.6 Analysis p. 43
5.2.7 Conclusion p. 43
5.3 Input provided in S4-180472 - On ITU-R BS.1534 (MUSHRA) p. 44
5.3.1 Introduction p. 44
5.3.2 Description p. 44
5.3.2.1 General p. 44
5.3.3 Conclusion p. 44
5.3.4 References p. 44
5.4 Input provided in S4-180805 - Verification of CIBR configuration for FOA p. 44
5.4.1 Summary p. 44
5.4.2 FOA rendering in CIBR p. 45
5.4.2.1 Test Design p. 45
5.4.2.2 Test Material p. 45
5.4.2.3 Listening Environment p. 45
5.4.2.4 Listening Panel p. 46
5.4.2.5 Results p. 46
5.4.3 Conclusions p. 47
5.4.4 References p. 47
$ Change history p. 48
