HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Dynamical Variational Autoencoders: A Comprehensive Review

Abstract : The Variational Autoencoder (VAE) is a powerful deep generative model that is now extensively used to represent high-dimensional complex data via a low-dimensional latent space that is learned in an unsupervised manner. In the original VAE model, input data vectors are processed independently. In the recent years, a series of papers have presented different extensions of the VAE to sequential data, that not only model the latent space, but also model the temporal dependencies within a sequence of data vectors and/or corresponding latent vectors, relying on recurrent neural networks or state space models. In this paper we perform an extensive literature review of these models. Importantly, we introduce and discuss a general class of models called Dynamical Variational Autoencoders (DVAEs) that encompass a large subset of these temporal VAE extensions. Then we present in details seven different instances of DVAE that were recently proposed in the literature, with an effort to homogenize the notations and presentation lines, as well as to relate those models with existing classical temporal models (that are also presented for the sake of completeness). We reimplemented those seven DVAE models and we present the results of an experimental benchmark that we conducted on the speech analysis-resynthesis task (the PyTorch code will be made publicly available). An extensive discussion is presented at the end of the paper, aiming to comment on important issues concerning the DVAE class of models and to describe future research guidelines.
Complete list of metadata

https://hal.inria.fr/hal-02926215
Contributor : Perception Team Connect in order to contact the contributor
Submitted on : Tuesday, January 18, 2022 - 5:09:19 PM
Last modification on : Wednesday, May 4, 2022 - 11:58:03 AM

File

Girin_at_al_DVAE_review_2021_a...
Files produced by the author(s)

Identifiers

Citation

Laurent Girin, Simon Leglaive, Xiaoyu Bie, Julien Diard, Thomas Hueber, et al.. Dynamical Variational Autoencoders: A Comprehensive Review. Foundations and Trends in Machine Learning, Now Publishers, 2021, 15 (1-2), pp.1-175. ⟨10.1561/2200000089⟩. ⟨hal-02926215⟩

Share

Metrics

Record views

624

Files downloads

91