Smaller World Models for Reinforcement Learning

• URL: http://arxiv.org/abs/2010.05767v2
• Date: Tue, 2 Mar 2021 12:02:16 GMT
• Title: Smaller World Models for Reinforcement Learning
• Authors: Jan Robine, Tobias Uelwer, Stefan Harmeling
• Abstract summary: We propose a new neural network architecture for world models based on a vector quantized-variational autoencoder (VQ-VAE) A model-free PPO agent is trained purely on simulated experience from the world model. We show that we reach comparable performance to their SimPLe algorithm, while our model is significantly smaller.
• Score: 0.5156484100374059
• License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
• Abstract: Sample efficiency remains a fundamental issue of reinforcement learning. Model-based algorithms try to make better use of data by simulating the environment with a model. We propose a new neural network architecture for world models based on a vector quantized-variational autoencoder (VQ-VAE) to encode observations and a convolutional LSTM to predict the next embedding indices. A model-free PPO agent is trained purely on simulated experience from the world model. We adopt the setup introduced by Kaiser et al. (2020), which only allows 100K interactions with the real environment. We apply our method on 36 Atari environments and show that we reach comparable performance to their SimPLe algorithm, while our model is significantly smaller.

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