ISO/IEC 23090-14:2025

International
Standard
ISO/IEC 23090-14
Second edition
Information technology — Coded
2025-11
representation of immersive media —
Part 14:
Scene description
Technologies de l'information — Représentation codée de média
immersifs —
Partie 14: Description de scènes
Reference number
© ISO/IEC 2025
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© ISO/IEC 2025 – All rights reserved
ii
Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, abbreviated terms, and conventions . 1
3.1 Terms and definitions .1
3.2 Abbreviated terms .3
3.3 Conventions .4
3.3.1 General .4
3.3.2 Arithmetic operators .4
3.3.3 Logical operators .4
3.3.4 Relational operators .5
3.3.5 Bit-wise operators .5
3.3.6 Assignment operators .5
3.3.7 Other operators .6
3.3.8 Order of operation precedence .6
3.3.9 Text description of logical operations .6
4 Overview and architecture . 8
4.1 Overview .8
4.2 Architecture .8
4.3 Timing model .11
5 Scene description extensions .12
5.1 General . 12
5.1.1 Overview of extensions . 12
5.1.2 Formatting and typing . 13
5.2 Generic extensions .14
5.2.1 MPEG_media extension .14
5.2.2 MPEG_accessor_timed extension .17
5.2.3 MPEG_buffer_circular extension . 20
5.2.4 MPEG_scene_dynamic extensions . 22
5.3 Visual Extensions .24
5.3.1 MPEG_texture_video extensions .24
5.3.2 MPEG_mesh_linking extensions . 25
5.4 Audio extensions.27
5.4.1 MPEG_audio_spatial extensions .27
5.5 Metadata extensions .31
5.5.1 MPEG_viewport_recommended extensions .31
5.5.2 MPEG_animation_timing extensions.32
6 Media access function and buffer API .33
6.1 General . 33
6.2 Media access function API . 34
6.3 Buffer API . 38
7 Carriage formats .40
7.1 General . 40
7.2 Carriage format for glTF JSON and JSON patch . 40
7.2.1 General . 40
7.2.2 glTF patch config box .41
7.3 Carriage format for glTF object and glTF source object as non-timed item .42
7.3.1 General .42
7.3.2 glTF Items .42
7.3.3 glTF source items .42
7.4 Carriage format for mesh correspondence values .43

© ISO/IEC 2025 – All rights reserved
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7.4.1 General .43
7.4.2 Vertices correspondence sample entry .43
7.4.3 Vertices correspondence sample format . 44
7.5 Carriage format for pose and weight . 44
7.5.1 General . 44
7.5.2 Pose transformation sample entry .45
7.5.3 Pose transformation sample format .45
7.6 Carriage format for animation timing . 46
7.6.1 General . 46
7.6.2 Animation sample entry . 46
7.6.3 Animation sample format .47
7.7 Sample redundancies . 48
7.8 Brands . 48
8 Advanced Features .48
8.1 AR Anchoring . 48
8.1.1 MPEG_anchor extension . 48
8.1.2 Semantics . 48
8.1.3 Processing model .
...