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About this paper
Jintao Chen, Chengyu Bai, Junjun Hu, Xinda Xue, Mu Xu
The Peking University and Alibaba research introduces Grounded Forcing, a framework for robust and interactive infinite-length video generation that addresses semantic forgetting, visual drift, and controllability loss. It maintains high subject and background consistency and enables smooth dynamic prompt adaptation over extended video durations, up to 240 seconds.
Key insights
- Maintaining long-term video coherence requires decoupling time-independent semantic anchors from local, dynamic motion details.
- Positional embedding extrapolation to out-of-distribution temporal indices is a primary cause of visual degradation in long-horizon autoregressive generation.
- Interactive control in video synthesis necessitates an asymmetric cache update strategy that prioritizes new instructions for recent frames while preserving long-term context from distant frames.
Summary by alphaXiv.
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