Tech-invite 3GPPspace IETFspace

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Content for TR 26.962 Word version: 18.0.0

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4 Viewport Dependent Processing (VDP) p. 8

4.1 Introduction p. 8

4.2 360-degree Video Optimized for the Viewport p. 8

4.3 Tiled Video with Multiple Quality Levels p. 9

4.4 Viewport-only Delivery p. 11

4.4.1 Sphere-locked p. 11

4.4.2 Viewport-Locked p. 12

4.5 HQ Viewport with LQ background p. 13

4.6 Comparisons of the Proposed Solutions p. 14

4.7 Viewport Margins p. 15

4.8 Encoding assumptions p. 16

4.9 Scalability p. 17

5 RTCP Feedback for VDP p. 17

5.1 Introduction p. 17

5.2 Viewport Feedback Triggering Threshold p. 18

5.3 Event-based Viewport Feedback p. 19

5.4 Hybrid Fixed Interval and Event-driven Feedback p. 19

6 Presentation replacement (screen share) p. 21

6.1 Introduction p. 21

6.2 Presentation replacement example message flow p. 22

6.2.1 Case 1 - The 360-content from the ITT4RT-Tx is suitable for replacement and the ITT4RT-MRF does support replacement p. 22

6.2.2 Case 2 - The 360-content from the ITT4RT-Tx is suitable for replacement and the ITT4RT-MRF does NOT support replacement - Replacement is executed in the ITT4RT-Tx p. 23

6.2.3 Case 3 - The 360-content from the ITT4RT-Tx is suitable for replacement and the ITT4RT-MRF does NOT support replacement - no replacement is executed p. 24

6.2.4 Case 4 - The 360-content is not suitable for replacement but the ITT4RT-MRF does support replacement. p. 25

6.2.5 Case 5 - The 360-content is not suitable for replacement (e.g., the presentation is not visible in the conference room) and the ITT4RT-MRF does not support replacement p. 26

7 Scene Description-based Overlay p. 26

7.1 Scene Description p. 26

7.1.1 Overview p. 26

7.1.2 glTF 2.0 p. 26

7.1.3 MPEG-I Scene Description p. 26

7.2 Scene Description for ITT4RT Sessions p. 27

7.3 Referencing Media Streams p. 28

$ Change history p. 29