Abstract
Quantization errors in video diffusion transformers can be amplified or attenuated by subsequent denoising updates, making local reconstruction error an incomplete predictor of final impact. We introduce PulseQuant, a 4-bit post-training quantization method that combines trajectory sensitivity with activation geometry to guide offline calibration. Isolated block--step interventions estimate propagation risk, which prioritizes sensitive trajectory states during row-radius selection. With these radii fixed, response-subspace correction uses neighboring-code edits to reduce residual components along dominant activation directions. Both stages preserve the original 4-bit weight representation. Controlled interventions show that short-horizon propagated error predicts final latent error more reliably than immediate block-output error, supporting calibration beyond local reconstruction objectives. Evaluations on Wan models, Self Forcing, and MiniMax-H3 demonstrate improvements in key consistency and dense-reference metrics while remaining competitive on other attributes across model scales and generation paradigms.
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Publication details
- Journal
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- Open access
- Green open access
Cite this article
APA 7
Wang, Y., Ge, X., Liu, E., Wang, Y., Xue, T., Chen, X., & Xu, C. (2026). PulseQuant: Propagation-Guided Subspace Correction for 4-Bit Video Diffusion Transformers. https://omanscience.com/en/articles/pulsequant-propagation-guided-subspace-correction-for-4-bit-video-diffusion-transformers
MLA 9
Wang, Yutong, et al. "PulseQuant: Propagation-Guided Subspace Correction for 4-Bit Video Diffusion Transformers." https://omanscience.com/en/articles/pulsequant-propagation-guided-subspace-correction-for-4-bit-video-diffusion-transformers.
Chicago (author–date)
Wang, Yutong, Xingtong Ge, Enhuai Liu, Yunke Wang, Tianfan Xue, Xinyuan Chen, and Chang Xu. 2026. "PulseQuant: Propagation-Guided Subspace Correction for 4-Bit Video Diffusion Transformers." https://omanscience.com/en/articles/pulsequant-propagation-guided-subspace-correction-for-4-bit-video-diffusion-transformers.
Harvard
Wang, Y., Ge, X., Liu, E., Wang, Y., Xue, T., Chen, X. and Xu, C. (2026) 'PulseQuant: Propagation-Guided Subspace Correction for 4-Bit Video Diffusion Transformers', Available at: https://omanscience.com/en/articles/pulsequant-propagation-guided-subspace-correction-for-4-bit-video-diffusion-transformers.
Vancouver
Wang Y, Ge X, Liu E, Wang Y, Xue T, Chen X, et al. PulseQuant: Propagation-Guided Subspace Correction for 4-Bit Video Diffusion Transformers. https://omanscience.com/en/articles/pulsequant-propagation-guided-subspace-correction-for-4-bit-video-diffusion-transformers
IEEE
Y. Wang, X. Ge, E. Liu, Y. Wang, T. Xue, X. Chen, and C. Xu, "PulseQuant: Propagation-Guided Subspace Correction for 4-Bit Video Diffusion Transformers," https://omanscience.com/en/articles/pulsequant-propagation-guided-subspace-correction-for-4-bit-video-diffusion-transformers.