  Deep Recurrent Neural Network architectures, though remarkably capable at
modeling sequences, lack an intuitive high-level spatio-temporal structure.
That is while many problems in computer vision inherently have an underlying
high-level structure and can benefit from it. Spatio-temporal graphs are a
popular tool for imposing such high-level intuitions in the formulation of real
world problems. In this paper, we propose an approach for combining the power
of high-level spatio-temporal graphs and sequence learning success of Recurrent
Neural Networks~(RNNs). We develop a scalable method for casting an arbitrary
spatio-temporal graph as a rich RNN mixture that is feedforward, fully
differentiable, and jointly trainable. The proposed method is generic and
principled as it can be used for transforming any spatio-temporal graph through
employing a certain set of well defined steps. The evaluations of the proposed
approach on a diverse set of problems, ranging from modeling human motion to
object interactions, shows improvement over the state-of-the-art with a large
margin. We expect this method to empower new approaches to problem formulation
through high-level spatio-temporal graphs and Recurrent Neural Networks.
