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Theoretical Bound-Guided Hierarchical VAE for Neural Image Codecs
March 28, 2024, 4:42 a.m. | Yichi Zhang, Zhihao Duan, Yuning Huang, Fengqing Zhu
cs.LG updates on arXiv.org arxiv.org
Abstract: Recent studies reveal a significant theoretical link between variational autoencoders (VAEs) and rate-distortion theory, notably in utilizing VAEs to estimate the theoretical upper bound of the information rate-distortion function of images. Such estimated theoretical bounds substantially exceed the performance of existing neural image codecs (NICs). To narrow this gap, we propose a theoretical bound-guided hierarchical VAE (BG-VAE) for NIC. The proposed BG-VAE leverages the theoretical bound to guide the NIC model towards enhanced performance. We …
abstract arxiv autoencoders cs.lg eess.iv function hierarchical image images information narrow performance rate studies the information theory type vae variational autoencoders
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