Auxiliary Guided Autoregressive Variational Autoencoders
Résumé
Generative modeling of high-dimensional data is a key problem in machine learn-
ing. Successful approaches include latent variable models and autoregressive
models. The complementary strengths of these approaches, to model global and
local image statistics respectively, suggest hybrid models combining the strengths
of both models. Our contribution is to train such hybrid models using an auxiliary
loss function that controls which information is captured by the latent variables
and what is left to the autoregressive decoder. In contrast, prior work on such hy-
brid models needed to limit the capacity of the autoregressive decoder to prevent
degenerate models that ignore the latent variables and only rely on autoregressive
modeling. Our approach results in models with meaningful latent variable repre-
sentations, and which rely on powerful autoregressive decoders to model image
details. Our model generates qualitatively convincing samples, and yields state-
of-the-art quantitative results.
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