Papers › MMM: Generative Masked Motion Model

MMM: Generative Masked Motion Model

6 Dec 2023CVPR 2024 1arXiv:2312.03596archive 2025-07-28

Ekkasit Pinyoanuntapong, Pu Wang, Minwoo Lee, Chen Chen

Recent advances in text-to-motion generation using diffusion and autoregressive models have shown promising results. However, these models often suffer from a trade-off between real-time performance, high fidelity, and motion editability. To address this gap, we introduce MMM, a novel yet simple motion generation paradigm based on Masked Motion Model. MMM consists of two key components: (1) a motion tokenizer that transforms 3D human motion into a sequence of discrete tokens in latent space, and (2) a conditional masked motion transformer that learns to predict randomly masked motion tokens, conditioned on the pre-computed text tokens. By attending to motion and text tokens in all directions, MMM explicitly captures inherent dependency among motion tokens and semantic mapping between motion and text tokens. During inference, this allows parallel and iterative decoding of multiple motion tokens that are highly consistent with fine-grained text descriptions, therefore simultaneously achieving high-fidelity and high-speed motion generation. In addition, MMM has innate motion editability. By simply placing mask tokens in the place that needs editing, MMM automatically fills the gaps while guaranteeing smooth transitions between editing and non-editing parts. Extensive experiments on the HumanML3D and KIT-ML datasets demonstrate that MMM surpasses current leading methods in generating high-quality motion (evidenced by superior FID scores of 0.08 and 0.429), while offering advanced editing features such as body-part modification, motion in-betweening, and the synthesis of long motion sequences. In addition, MMM is two orders of magnitude faster on a single mid-range GPU than editable motion diffusion models. Our project page is available at \url{https://exitudio.github.io/MMM-page}.

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Tasks

Motion GenerationMotion Synthesismodelmotion in-betweening

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Results from the paper archive 2025-07-28

TaskDatasetModelMetricValueRank at snapshotLeaderboardReport
Motion Synthesis HumanML3D MMM (predict length) Diversity 9.411 #13 of 37 Archive leaderboard report
Motion Synthesis HumanML3D MMM (predict length) FID 0.080 #13 of 37 Archive leaderboard report
Motion Synthesis HumanML3D MMM (predict length) Multimodality 1.164 #13 of 37 Archive leaderboard report
Motion Synthesis HumanML3D MMM (predict length) R Precision Top3 0.794 #13 of 37 Archive leaderboard report
Motion Synthesis HumanML3D MMM (gt length) Diversity 9.577 #14 of 37 Archive leaderboard report
Motion Synthesis HumanML3D MMM (gt length) FID 0.089 #14 of 37 Archive leaderboard report
Motion Synthesis HumanML3D MMM (gt length) Multimodality 1.226 #14 of 37 Archive leaderboard report
Motion Synthesis HumanML3D MMM (gt length) R Precision Top3 0.804 #14 of 37 Archive leaderboard report
Motion Synthesis KIT Motion-Language MMM (gt length) Diversity 10.910 #14 of 31 Archive leaderboard report
Motion Synthesis KIT Motion-Language MMM (gt length) FID 0.316 #14 of 31 Archive leaderboard report
Motion Synthesis KIT Motion-Language MMM (gt length) Multimodality 1.232 #14 of 31 Archive leaderboard report
Motion Synthesis KIT Motion-Language MMM (gt length) R Precision Top3 0.744 #14 of 31 Archive leaderboard report
Motion Synthesis KIT Motion-Language MMM (predict length) Diversity 10.633 #17 of 31 Archive leaderboard report
Motion Synthesis KIT Motion-Language MMM (predict length) FID 0.429 #17 of 31 Archive leaderboard report
Motion Synthesis KIT Motion-Language MMM (predict length) Multimodality 1.105 #17 of 31 Archive leaderboard report
Motion Synthesis KIT Motion-Language MMM (predict length) R Precision Top3 0.718 #17 of 31 Archive leaderboard report

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