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Peng-Xiang Zhao

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#machine learning Preprint Oct 2026

Deflating the Hessian: Rank-4 W4A4 Quantization for Multimodal Diffusion Transformers

HSVDQuant is presented, a unified framework modeling low-rank-assisted W4A4 PTQ as a coupled calibration problem and deriving optimization-based solvers from the joint objective, which achieves better W4A4 performance with substantially lower rank and quantization cost.

Shi-Wen Wang, Peng-Xiang Zhao, Xiao-Ming Yuan · 0 citations