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arXiv · 2605.23226

MASQ: Accelerating Masked Diffusion via Stage-Wise Multi-Precision Quantization

Seeyeon Kim·Jaehun Lee·Sungyeob Yoo·Joo-Young Kim
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Abstract

Masked diffusion enables region-specific image synthesis but suffers from computational redundancy, since the entire image is processed each timestep even though only the masked region requires generation. To address this, we introduce MASQ, a hardware-software co-designed accelerator for masked diffusion. Our approach performs stage-wise MXINT8/4/2 precision assignment that dynamically reflects spatial and semantic importance, complemented by timestep-aware scheduling and optimized non-matrix operations. MASQ features a block-wise multi-precision compute engine and mask management unit, efficiently handling our approach. It achieves up to 16.06x and 5.39x speedup and 4.18x and 4.93x energy-efficiency gain over A100 and Orin NX, respectively, while preserving quality.

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Seeyeon Kim, Jaehun Lee, Sungyeob Yoo, Joo-Young Kim. 2026-05-22. MASQ: Accelerating Masked Diffusion via Stage-Wise Multi-Precision Quantization. https://arxiv.org/abs/2605.23226

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