Author

Rui Xia

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Aug 2026

Improved denoising diffusion probabilistic models with efficient non-diagonal covariance modeling

The Kronecker-DCT (K-DCT) model uses a Kronecker-factored decomposition of inter-color covariances and spatial covariances modeled in the frequency domain using the Discrete Cosine Transform (DCT), resulting in negligible computational and memory overhead in each denoising step.

Rui Xia, Ayan Das, A. Artemev et al. · Trans. Mach. Learn. Res. · 0 citations