VRoPE: Rotary Position Embedding for Video Large Language Models

• URL: http://arxiv.org/abs/2502.11664v1
• Date: Mon, 17 Feb 2025 10:53:57 GMT
• Title: VRoPE: Rotary Position Embedding for Video Large Language Models
• Authors: Zikang Liu, Longteng Guo, Yepeng Tang, Junxian Cai, Kai Ma, Xi Chen, Jing Liu,
• Abstract summary: Position Embedding (RoPE) has shown strong performance in text-based Large Language Models (LLMs) Video adaptations, such as RoPE-3D, attempt to encode spatial and temporal dimensions separately but suffer from two major limitations. We propose Position Rotary Embedding (VRoPE), a novel positional encoding method tailored for Video-LLMs.
• Score: 14.292586301871196
• License:
• Abstract: Rotary Position Embedding (RoPE) has shown strong performance in text-based Large Language Models (LLMs), but extending it to video remains a challenge due to the intricate spatiotemporal structure of video frames. Existing adaptations, such as RoPE-3D, attempt to encode spatial and temporal dimensions separately but suffer from two major limitations: positional bias in attention distribution and disruptions in video-text transitions. To overcome these issues, we propose Video Rotary Position Embedding (VRoPE), a novel positional encoding method tailored for Video-LLMs. Our approach restructures positional indices to preserve spatial coherence and ensure a smooth transition between video and text tokens. Additionally, we introduce a more balanced encoding strategy that mitigates attention biases, ensuring a more uniform distribution of spatial focus. Extensive experiments on Vicuna and Qwen2 across different model scales demonstrate that VRoPE consistently outperforms previous RoPE variants, achieving significant improvements in video understanding, temporal reasoning, and retrieval tasks. Code will be available at https://github.com/johncaged/VRoPE

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