Tech-invite 3GPPspace IETFspace

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Content for TS 26.260 Word version: 18.1.0

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3 Definitions, symbols and abbreviations p. 7

3.1 Definitions p. 7

3.2 Symbols p. 8

3.3 Abbreviations p. 9

4 Objective Test Methodologies for Immersive Audio Systems p. 9

4.0 General p. 9

4.0.1 Applicability p. 9

4.0.2 Test equipment p. 10

4.0.3 Test environment acoustic properties p. 10

4.1 Objective Test Methodologies for Assessment of Immersive Audio Systems in the Sending Direction p. 11

4.1.1 Diffuse-field Send Frequency Response for Scene-based Audio p. 11

4.1.1.1 Introduction p. 11

4.1.1.2 Definition p. 11

4.1.1.3 Test method with periphonic array p. 12

4.1.1.3.1 Test Conditions p. 12

4.1.1.3.2 Measurement p. 12

4.1.1.4 Test method with loudspeaker array and turn table p. 13

4.1.1.4.1 Test Conditions p. 13

4.1.1.4.2 Measurement p. 14

4.1.2 Directional response measurement for scene-based audio p. 15

4.1.2.1 Definition p. 15

4.1.2.2 Test conditions p. 15

4.1.2.3 Measurement p. 15

4.2 Objective Test Methodologies for Assessment of Immersive Audio Systems in the Receiving Direction p. 15

4.2.1 Headset Binaural Diffuse-field Receive frequency response for Scene-based audio p. 15

4.2.1.1 Introduction p. 15

4.2.1.2 Definition p. 15

4.2.1.3 Test Conditions p. 15

4.2.1.4 Measurement p. 16

4.2.2 Nominal System Sensitivity in Receive Direction for Channel-based audio p. 16

4.2.2.1 Introduction p. 16

4.2.2.2 Definition p. 16

4.2.2.3 Test Conditions p. 16

4.2.2.4 Measurement p. 17

4.2.3 Motion to Sound Latency in Dynamic Binaural Rendering Systems p. 17

4.2.3.1 Introduction p. 17

4.2.3.2 Requirements p. 17

4.2.3.3 Calibration p. 18

4.2.3.4 Evaluation Environment p. 19

4.2.3.5 Data acquisition p. 19

4.2.3.6 Data Analysis p. 19

5 Objective Test Methodologies for IVAS-based UEs p. 21

5.1 Overview p. 21

5.2 Interface Definitions p. 21

5.3 Test conditions p. 22

5.3.1 Test environment acoustic properties p. 22

5.3.2 System simulator and reference client p. 22

5.3.3 Test equipment p. 23

5.4 Test arrangement p. 23

5.4.1 Capture modes p. 23

5.4.2 UE types and positioning p. 24

5.4.2.1 Overview p. 24

5.4.2.2 Handset UE p. 25

5.4.2.3 Headset UE p. 25

5.4.2.4 Handheld hands-free UE p. 27

5.4.2.5 Table-mounted UE p. 29

5.4.2.6 Loudspeaker UE p. 30

5.4.2.7 Electrical interface UE p. 31

5.4.3 UE configuration p. 32

5.5 Test signals p. 32

5.5.1 Test signal calibration p. 32

5.5.2 Virtual positioning p. 33

5.6 Test methods for sending direction p. 34

5.6.1 Delay p. 34

5.6.2 Loudness p. 35

5.6.3 Frequency response (single source) p. 35

5.6.3.1 Test method p. 35

5.6.3.2 IVAS format-specific definitions p. 35

5.6.4 Directional information (single source) p. 36

5.6.4.1 Test method p. 36

5.6.4.2 IVAS format specific definitions p. 37

5.7 Test methods for receiving direction p. 39

5.7.1 Delay p. 39

5.7.2 Loudness p. 40

5.7.2.1 Test method p. 40

5.7.2.2 IVAS format specific definitions p. 40

5.7.3 Frequency response (single source) p. 40

5.7.4 Interaural differences for binaural rendering p. 41

A (Normative) Order dependent directions p. 43

B (Normative) Directions in Gaussian spherical grid p. 48

B.1 Definition p. 48

B.2 Example loudspeaker array p. 48

C (Normative) Cross-correlation analysis p. 48

$ Change history p. 50