ISO/IEC 23090-14:2023
Information technology — Coded representation of immersive media — Part 14: Scene description
This document specifies extensions to existing scene description formats in order to support MPEG media, in particular immersive media. MPEG media includes but is not limited to media encoded with MPEG codecs, media stored in MPEG containers, MPEG media and application formats as well as media provided through MPEG delivery mechanisms. Extensions include scene description format syntax and semantics and the processing model when using these extensions by a Presentation Engine. It also defines a Media Access Function (MAF) API for communication between the Presentation Engine and the Media Access Function for these extensions. While the extensions defined in this document can be applicable to other scene description formats, they are provided for ISO/IEC 12113.
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, abbreviated terms, and conventions
3.1 Terms and definitions
3.2 Abbreviated terms
3.3 Conventions
3.3.1 General
3.3.2 Arithmetic operators
3.3.3 Logical operators
3.3.4 Relational operators
3.3.5 Bit-wise operators
3.3.6 Assignment operators
3.3.7 Other operators
3.3.8 Order of operation precedence
3.3.9 Text description of logical operations
4 Overview and architecture
4.1 Overview
4.2 Architecture
4.3 Timing model
5 Scene description extensions
5.1 General
5.1.1 Overview of extensions
5.1.2 Formatting and typing
5.2 Generic extensions
5.2.1 MPEG_media extension
5.2.2 MPEG_accessor_timed extension
5.2.3 MPEG_buffer_circular extension
5.2.4 MPEG_scene_dynamic extensions
5.3 Visual Extensions
5.3.1 MPEG_texture_video extensions
5.3.2 MPEG_mesh_linking extensions
5.4 Audio extensions
5.4.1 MPEG_audio_spatial extensions
5.5 Metadata extensions
5.5.1 MPEG_viewport_recommended extensions
5.5.2 MPEG_animation_timing extensions
6 Media access function and buffer API
6.1 General
6.2 Media access function API
6.3 Buffer API
7 Carriage formats
7.1 General
7.2 Carriage format for glTF JSON and JSON patch
7.2.1 General
7.2.2 glTF patch config box
7.3 Carriage format for glTF object and glTF source object as non-timed item
7.3.1 General
7.3.2 glTF Items
7.3.3 glTF source items
7.4 Carriage format for mesh correspondence values
7.4.1 General
7.4.2 Vertices correspondence sample entry
7.4.3 Vertices correspondence sample format
7.5 Carriage format for pose and weight
7.5.1 General
7.5.2 Pose transformation sample entry
7.5.3 Pose transformation sample format
7.6 Carriage format for animation timing
7.6.1 General
7.6.2 Animation sample entry
7.6.3 Animation sample format
7.7 Sample redundancies
7.8 Brands
Annex A (informative) JSON schema reference
Annex B (normative) Attribute registry
Annex C (normative) Support for real-time media
Annex D (normative) Audio attenuation functions
Annex E (informative) Linking a dependent mesh and its associated shadow mesh
Annex F (informative) glTF extension usage examples
Bibliography
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms, definitions, abbreviated terms, and conventions
3.1 Terms and definitions
3.2 Abbreviated terms
3.3 Conventions
3.3.1 General
3.3.2 Arithmetic operators
3.3.3 Logical operators
3.3.4 Relational operators
3.3.5 Bit-wise operators
3.3.6 Assignment operators
3.3.7 Other operators
3.3.8 Order of operation precedence
3.3.9 Text description of logical operations
4 Overview and architecture
4.1 Overview
4.2 Architecture
4.3 Timing model
5 Scene description extensions
5.1 General
5.1.1 Overview of extensions
5.1.2 Formatting and typing
5.2 Generic extensions
5.2.1 MPEG_media extension
5.2.2 MPEG_accessor_timed extension
5.2.3 MPEG_buffer_circular extension
5.2.4 MPEG_scene_dynamic extensions
5.3 Visual Extensions
5.3.1 MPEG_texture_video extensions
5.3.2 MPEG_mesh_linking extensions
5.4 Audio extensions
5.4.1 MPEG_audio_spatial extensions
5.5 Metadata extensions
5.5.1 MPEG_viewport_recommended extensions
5.5.2 MPEG_animation_timing extensions
6 Media access function and buffer API
6.1 General
6.2 Media access function API
6.3 Buffer API
7 Carriage formats
7.1 General
7.2 Carriage format for glTF JSON and JSON patch
7.2.1 General
7.2.2 glTF patch config box
7.3 Carriage format for glTF object and glTF source object as non-timed item
7.3.1 General
7.3.2 glTF Items
7.3.3 glTF source items
7.4 Carriage format for mesh correspondence values
7.4.1 General
7.4.2 Vertices correspondence sample entry
7.4.3 Vertices correspondence sample format
7.5 Carriage format for pose and weight
7.5.1 General
7.5.2 Pose transformation sample entry
7.5.3 Pose transformation sample format
7.6 Carriage format for animation timing
7.6.1 General
7.6.2 Animation sample entry
7.6.3 Animation sample format
7.7 Sample redundancies
7.8 Brands
Annex A (informative) JSON schema reference
Annex B (normative) Attribute registry
Annex C (normative) Support for real-time media
Annex D (normative) Audio attenuation functions
Annex E (informative) Linking a dependent mesh and its associated shadow mesh
Annex F (informative) glTF extension usage examples
Bibliography