# JCA model jointly generates 3D motion and video for arbitrary skeletons

- Source: HuggingFace Daily Papers
- Published: 2026-10-20T00:00:00.000Z
- RoboHot: https://robohot.news/en/items/ylyrmd2a5el52ce5fnvvjhdrr
- Original: https://huggingface.co/papers/2610.28632

## Summary

An NVIDIA research team proposes the JCA model, which can simultaneously generate video and replayable 3D motion for any given skeleton, and output a camera that registers the motion to the scene. The model keeps 3D motion in a separate model that supports arbitrary skeletons, connects to a pretrained video model through a small number of cross-attention layers, and the motion model first learns skeleton movement from motion-only data.