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arXiv 2008.12595cs.LGstat.ML
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Dynamical Variational Autoencoders:一个全面的综述

Dynamical Variational Autoencoders: A Comprehensive Review

Laurent Girin, Simon Leglaive, Xiaoyu Bie, Julien Diard, Thomas Hueber, Xavier Alameda-Pineda

摘要:

变分自编码器(VAE)是一种强大的深度生成模型,广泛用于通过以无监督方式学习的低维潜在空间来表示高维复杂数据。在原始VAE模型中,输入数据向量被独立地处理。最近,一系列的论文已经提出了不同的扩展VAE处理序列数据,它的模型不仅潜在的空间,但也在一个序列的数据向量和相应的潜在向量的时间依赖性,依赖于递归神经网络或状态空间模型。在本文中,我们对这些模型进行了文献综述。我们介绍和讨论一类通用的模型,称为动态变分自编码器(DVAE),其中包括一个大的子集,这些时间VAE扩展。然后,我们详细介绍了七个最近提出的DVAE模型,其目的是均匀的符号和表示线,以及将这些模型与现有的经典时间模型。我们重新实现了这七个DVAE模型,并展示了在语音分析-再合成任务上进行的实验基准测试的结果(PyTorch代码是公开的)。本文最后讨论了DVAE类模型和未来研究指南的重要问题。

英文摘要:

Variational autoencoders (VAEs) are powerful deep generative models widely used to represent high-dimensional complex data through a low-dimensional latent space learned in an unsupervised manner. In the original VAE model, the input data vectors are processed independently. Recently, a series of papers have presented different extensions of the VAE to process sequential data, which model not only the latent space but also the temporal dependencies within a sequence of data vectors and corresponding latent vectors, relying on recurrent neural networks or state-space models. In this paper, we perform a literature review of these models. We introduce and discuss a general class of models, called dynamical variational autoencoders (DVAEs), which encompasses a large subset of these temporal VAE extensions. Then, we present in detail seven recently proposed DVAE models, with an aim to homogenize the notations and presentation lines, as well as to relate these models with existing classical temporal models. We have reimplemented those seven DVAE models and present the results of an experimental benchmark conducted on the speech analysis-resynthesis task (the PyTorch code is made publicly available). The paper concludes with a discussion on important issues concerning the DVAE class of models and future research guidelines.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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