MemVLN: 視覚言語ナビゲーションのためのストリーミングエピソード記憶
MemVLN: Streaming Episodic Memory for Vision-Language Navigation
圧縮した知覚特徴を時系列と相対姿勢付きで保持する有界な記憶バンクとクロスアテンションによる記憶トークン生成を提案し、長期的な視覚言語ナビゲーションの性能を向上させた研究。
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著者: Yan Wang, Jiangyong Huang, Baoxiong Jia, Siyuan Huang
分類: cs.CV
原文アブストラクト
Vision-language navigation (VLN) requires an embodied agent to follow language instructions through 3D environments. Maintaining persistent episodic memory remains a challenge for VLM-based streaming agents in long-horizon navigation. We present MEMVLN, a streaming episodic memory framework that maintains a bounded bank of compressed perceptual features annotated with timesteps and action-derived relative poses, and produces compact memory tokens via cross-attention. We pair the proposed memory with a frozen pretrained geometry encoder. To learn the memory module, we design a masking-based trajectory summarization task with multi-granularity sub-trajectory decomposition, encouraging route reconstruction exclusively from episodic memory. Under navigation training restricted to the official R2R/RxR trajectories, MEMVLN achieves state-of-the-art performance on most reported metrics on standard VLN-CE benchmarks. Long-horizon analyses further characterize when episodic memory is useful. For physical evaluation, we collect 30 instruction-conditioned episodes in one physical scene, use 24 as demonstrations for post-training, and hold out six for testing. On the held-out episodes, MEMVLN improves success over the VLM baseline from 17% to 40%, and post-training further raises it to 47%.