Token-World: 視覚言語モデルのトークン空間におけるロボット操作のための世界モデリング
Token-World: World Modeling in Vision-Language Model Token Space for Robot Manipulation
VLAモデルの視覚トークンを圧縮した状態空間で未来のダイナミクスを予測する世界モデルを提案し、操作ベンチマークで予測精度と方策整合性を向上させた。
詳しい要約
1. どんなもの？
2. 先行研究と比べてどこがすごい？
3. 技術・手法の肝は？
4. どうやって有効だと検証した？
5. 議論はある？
6. 次に読むべき論文は？
※ AIが要旨から生成した要約です。正確性は原文をご確認ください。
著者: Chuyao Fu, Xiaowei Chi, Yuhan Rui, Yu-kai Wang, Zezhong Qian, Xiaojie Zhang, Yunfan Lou, Kevin Zhang, Kuangzhi Ge, Chak Wing Mak, Zhiyang Chen, Athena Zhuoming Zhong, Hongyang Chen, Haoran Li, Yike Guo, Sirui Han, Shanghang Zhang
分類: cs.RO
原文アブストラクト
A common approach to world-model simulation for vision-language-action (VLA) systems is to predict future RGB observations and then re-encode them into policy inputs, introducing an indirect interface between simulation and downstream policy execution. We instead investigate whether world dynamics can be modeled in a compact, policy-oriented state derived from VLM visual tokens. A key challenge is that raw VLM visual tokens are high-dimensional, making efficient and accurate autoregressive dynamics modeling challenging. To address this, we introduce Token-World, an action-conditioned world model that compresses VLM features into a compact token state, learns future dynamics in this reduced space, and maps predicted states back to the original policy-facing representation for downstream use. Across manipulation benchmarks, Token-World improves open-loop feature fidelity and policy-action consistency over recent world-model simulators, with slower degradation over long rollout horizons. In closed-loop evaluation, its simulated policy performance correlates more strongly with reference policy performance than Ctrl-World ($r=0.794$ vs.\ $0.583$), while requiring lower simulation latency. Ablations further show that compact-representation design and dimensionality substantially affect future-state prediction. Code will be available at https://chuyaofu.github.io/Token-World/.
