MIRTH: 相互情報推論と時間的ハブによる視覚-言語-行動エージェント
MIRTH: Mutual-Information Reasoning with Temporal Hubs for Vision-Language-Action Agents
VLAモデルの時間的視野狭窄や推論ギャップ、推論効率の問題を解決するため、二重スケールの時間メモリハブ、相互情報目的の潜在推論トークン、並列行動デコードを導入した統一フレームワークMIRTHを提案。LIBEROベンチマークと実機でSOTAを達成。
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著者: Hao Sun, Yu Song, Shiyu Teng, Ziwei Niu, Yen-Wei Chen
分類: cs.RO, cs.AI
原文アブストラクト
VLA models have emerged as a powerful paradigm for transferring semantic knowledge from web-scale data to physical robotic control. However, current single-frame architectures suffer from intrinsic limitations: temporal myopia that discards historical dynamics, reasoning gaps between high-level instructions and low-level motor commands, and inference inefficiency due to autoregressive scalar decoding. In this work, we propose MIRTH, a unified framework designed to address these challenges. MIRTH augments a pretrained VLA backbone with three key innovations: (1) dual-scale temporal memory hubs that compress long-term scene evolution and short-term motion trends into compact embeddings; (2) latent reasoning tokens optimized via a mutual-information objective carving out a semantic plan space to align multimodal context with action trajectories; and (3) a parallel action decoding scheme that replaces autoregressive generation with vector-wise prediction to maximize control throughput. Extensive evaluations on the LIBERO simulation benchmark and a real-world LeRobot platform demonstrate that MIRTH achieves state-of-the-art performance and exhibiting emergent error recovery capabilities. The codes and collected datasets are released at http://github.com/kiva12138/mirth.
