Papers › Motion2Language, unsupervised learning of synchronized semantic motion segmentation
Motion2Language, unsupervised learning of synchronized semantic motion segmentation
Karim Radouane, Andon Tchechmedjiev, Julien Lagarde, Sylvie Ranwez
In this paper, we investigate building a sequence to sequence architecture for motion to language translation and synchronization. The aim is to translate motion capture inputs into English natural-language descriptions, such that the descriptions are generated synchronously with the actions performed, enabling semantic segmentation as a byproduct, but without requiring synchronized training data. We propose a new recurrent formulation of local attention that is suited for synchronous/live text generation, as well as an improved motion encoder architecture better suited to smaller data and for synchronous generation. We evaluate both contributions in individual experiments, using the standard BLEU4 metric, as well as a simple semantic equivalence measure, on the KIT motion language dataset. In a follow-up experiment, we assess the quality of the synchronization of generated text in our proposed approaches through multiple evaluation metrics. We find that both contributions to the attention mechanism and the encoder architecture additively improve the quality of generated text (BLEU and semantic equivalence), but also of synchronization. Our code is available at https://github.com/rd20karim/M2T-Segmentation/tree/main
Code
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Tasks
Results from the paper archive 2025-07-28
| Task | Dataset | Model | Metric | Value | Rank at snapshot | Leaderboard | Report |
|---|---|---|---|---|---|---|---|
| Motion Captioning | HumanML3D | MLP+GRU | BERTScore | 37.2 | #2 of 4 | Archive leaderboard | report |
| Motion Captioning | HumanML3D | MLP+GRU | BLEU-4 | 23.4 | #2 of 4 | Archive leaderboard | report |
| Motion Captioning | KIT Motion-Language | MLP+GRU | BERTScore | 42.1 | #1 of 3 | Archive leaderboard | report |
| Motion Captioning | KIT Motion-Language | MLP+GRU | BLEU-4 | 25.4 | #1 of 3 | Archive leaderboard | report |
Ranks are positions in the archive's leaderboards as they stood at the 2025-07-28 snapshot. Results published since then are not among these rows, so a rank here is not a current standing.
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