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HQ-VAE: Hierarchical Discrete Representation Learning with Variational Bayes
March 29, 2024, 4:43 a.m. | Yuhta Takida, Yukara Ikemiya, Takashi Shibuya, Kazuki Shimada, Woosung Choi, Chieh-Hsin Lai, Naoki Murata, Toshimitsu Uesaka, Kengo Uchida, Wei-Hsiang
cs.LG updates on arXiv.org arxiv.org
Abstract: Vector quantization (VQ) is a technique to deterministically learn features with discrete codebook representations. It is commonly performed with a variational autoencoding model, VQ-VAE, which can be further extended to hierarchical structures for making high-fidelity reconstructions. However, such hierarchical extensions of VQ-VAE often suffer from the codebook/layer collapse issue, where the codebook is not efficiently used to express the data, and hence degrades reconstruction accuracy. To mitigate this problem, we propose a novel unified framework …
abstract arxiv bayes cs.ai cs.cv cs.lg extensions features fidelity hierarchical however layer learn making quantization representation representation learning type vae vector
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