Avatar controllers in scene descriptions

The MPEG_controllers extension in the MPEG-I Scene Description format addresses the lack of standardization in combining avatar animations by using semantic tags to define controller functions, enabling flexible and interoperable avatar manipulation in virtual scenes.

WO2025201956A1PCT designated stage Publication Date: 2025-10-02INTERDIGITAL CE PATENT HOLDINGS SAS
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Patent Information

Application Number
PCT/EP2025/057267
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-03-27
Filing Date
2025-03-17
Publication Date
2025-10-02

AI Technical Summary

Technical Problem

The current MPEG-I Scene Description format does not clearly define how animations can be combined, particularly for modifying or animating the appearance of avatars, and lacks standardization in defining the meaning of animation names, making it difficult to combine multiple animations or understand their properties.

Method used

The proposed solution introduces an MPEG_controllers extension that defines controllers as high-level controllable animations, associating semantic tags with syntax structures to clearly identify their purpose and functionality, allowing for the combination and manipulation of avatar animations using controller sets and sets of controllers.

Benefits of technology

This approach enables clear and standardized manipulation of avatar animations, facilitating the exchange of avatar instances across heterogeneous environments and ensuring that applications understand the intended actions of controllers, thereby enhancing the flexibility and interoperability of avatar models in virtual scenes.

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Abstract

In an example embodiment, a runtime asset delivery file for a 3D scene (such as a glTF file) includes a plurality of first syntax structures, each first syntax structure defining an association between an input weight value and a corresponding transformation of at least one of a plurality of nodes in the scene; and at least one second syntax structure associating a respective semantic tag with at least one of the first syntax structures. In an example method, such a runtime asset delivery file is obtained; at least one of the first syntax structures is selected based on the associated semantic tag; and the transformation indicated by the selected first syntax structure is applied to the node.
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Citation Information

Patent Citations

  • EP23306167A

  • EP23305405A