PromptMobile: Efficient Promptus for Low Bandwidth Mobile Video Streaming

Traditional video compression algorithms exhibit significant quality degradation at extremely low bitrates. Promptus emerges as a new paradigm for video streaming, substantially cutting down the bandwidth essential for video streaming. However, Promptus is computationally intensive and can not run in real-time on mobile devices. This paper presents PromptMobile, an efficient acceleration framework tailored for on-device Promptus. Specifically, we propose (1) a two-stage efficient generation framework to reduce computational cost by 8.1x, (2) a fine-grained inter-frame caching to reduce redundant computations by 16.6\%, (3) system-level optimizations to further enhance efficiency. The evaluations demonstrate that compared with the original Promptus, PromptMobile achieves a 13.6x increase in image generation speed. Compared with other streaming methods, PromptMobile achives an average LPIPS improvement of 0.016 (compared with H.265), reducing 60\% of severely distorted frames (compared to VQGAN).

@article{liu2025_2503.16112,
  title={ PromptMobile: Efficient Promptus for Low Bandwidth Mobile Video Streaming },
  author={ Liming Liu and Jiangkai Wu and Haoyang Wang and Peiheng Wang and Xinggong Zhang and Zongming Guo },
  journal={arXiv preprint arXiv:2503.16112},
  year={ 2025 }
}