Extended Reality (XR) and 3D scene delivery bring interactive, spatially-aware content to 5G devices, from augmented reality overlays to full virtual environments. 5G-MAG's work centres on MPEG-I Scene Description (ISO/IEC 23090-14), a standard format for describing dynamic 3D scenes composed of glTF 3D objects, audio, and haptic elements.
Scene Description content can be transported using the 5G Media Streaming (5GMS) framework, enabling adaptive and policy-driven delivery of immersive media alongside the scene's own glTF assets and media tracks.
The Problem It Solves
Without a common scene format, an XR application's rendering engine and its media pipeline are locked together — swapping either one means rebuilding the other. MPEG-I Scene Description avoids that by splitting the two roles cleanly: the Presentation Engine renders the scene and knows nothing about how media gets decoded, while the Media Access Function (MAF) is transport- and codec-agnostic, building whatever pipeline a media object needs behind a fixed API. The same scene document plays identically whether the media arrives over MPEG-DASH, RTP/SRTP or a local file, so a content author writes one scene and a device vendor builds one MAF, instead of every combination needing its own integration.
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