Overview
ISO/IEC 23090-7:2022/Amd 1:2024 is the latest amendment to the international standard covering the coded representation of immersive media, specifically focusing on immersive media metadata. This amendment introduces and defines common metadata structures tailored for immersive media technologies such as virtual reality (VR), augmented reality (AR), and mixed reality (MR). It applies to various immersive content formats including omnidirectional media, volumetric video-based coding (V3C), and point cloud compression (V-PCC). Developed collaboratively by ISO and IEC, this standard is essential for harmonizing metadata handling in immersive media, ensuring interoperability and enhancing content management efficiency.
Key Topics
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Common Metadata Syntax and Semantics
The amendment standardizes metadata syntax and semantics applicable to both 3 Degrees of Freedom (3DoF) and 6 Degrees of Freedom (6DoF) immersive content. It enables flexible usage across content types allowing for separate or joint application in mixed immersive media environments.
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3D Vector and Scaling Definitions
Defines precise 3-dimensional vector structures for position, size, and scale within immersive spaces, supporting accurate spatial representation.
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Camera Metadata Structures
Includes comprehensive extrinsic and intrinsic camera information formats:
- Extrinsic Camera Information covers position and orientation data using quaternion rotation, which is crucial for representing camera movement and perspective precisely in 3D environments.
- Intrinsic Camera Information details camera projection types such as equirectangular projection (ERP), perspective, and orthographic projection, along with their specific field of view and clipping planes.
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Viewing Spaces and Regions
Introduces standardized data structures for defining cuboid viewing spaces and regions within immersive environments. This allows precise modeling of areas of interest or interaction zones in 3D space.
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3D Region Sets
Defines complex spatial segmentation using points, polylines, planes, cuboids, and attribute-based geometries. This supports detailed partitioning of volumetric media for efficient processing, annotation, and visualization.
Applications
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Immersive Media Production and Distribution
Enables content creators and distributors to encode consistent metadata across multiple immersive content types, facilitating content standardization and simplifying downstream processing.
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Virtual and Augmented Reality Platforms
Improves the accuracy of camera positioning and viewport management, essential for rendering high-fidelity immersive experiences.
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Volumetric Video and Point Cloud Compression
Supports metadata definitions critical for advanced 3D media coding techniques, enhancing compression efficiency and playback quality.
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Interactive 3D Environments
Used for defining interactive zones, spatial anchors, and camera parameters within immersive applications such as gaming, training simulations, and remote collaboration.
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Metadata Integration in ISO Base Media File Format (ISOBMFF)
Allows encapsulation of static and dynamic metadata within multimedia containers, making it easier for developers to integrate immersive media metadata into existing digital frameworks.
Related Standards
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ISO/IEC 23090 Series
This document is part of the broader ISO/IEC 23090 series, which encompasses coded representation of immersive media covering various aspects such as media formats and coding technologies.
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IEEE 754-2019
The amendment references the IEEE Standard for Floating-Point Arithmetic, ensuring precise representation of numerical metadata such as camera parameters and spatial dimensions.
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ISO/IEC Directives, Part 1 and Part 2
The development and editorial processes follow the unified directives that govern international standard creation and maintenance by ISO and IEC.
Summary
ISO/IEC 23090-7:2022/Amd 1:2024 establishes a robust framework for common immersive media metadata, critical for consistent spatial metadata definition in immersive environments. By addressing key elements such as 3D vector representation, camera parameters, viewing volumes, and region sets, this amendment enhances interoperability across immersive systems and media formats. It plays a vital role for developers, content creators, and service providers engaged in cutting-edge VR, AR, MR, and volumetric media technologies seeking standardized metadata solutions for improved performance and compatibility.