Project Page: https://sites.google.com/nvidia.com/conv-tt-lstm
GitHub Page: https://github.com/NVlabs/conv-tt-lstm
Learning from spatio-temporal data has numerous applications such as human-behavior analysis, object tracking, video compression, and physics simulation. However, existing methods still perform poorly on challenging video tasks such as long-term forecasting. This is because these kinds of challenging tasks require learning long-term spatio-temporal correlations in the video sequence. In this paper, we propose a higher-order convolutional LSTM model that can efficiently learn these correlations, along with succinct representations of the history. This is accomplished through a novel tensor-train module that performs prediction by combining convolutional features across time. To make this feasible in terms of computation and memory requirements, we propose a novel convolutional tensor-train decomposition of the higher-order model. This decomposition reduces the model complexity by jointly approximating a sequence of convolutional kernels by a low-rank tensor-train factorization. As a result, our model outperforms existing approaches but uses only a fraction of parameters, including the baseline models. Our results achieve state-of-the-art performance in a wide range of applications and datasets, including the multi-steps video prediction on the Moving-MNIST-2and KTH action datasets as well as early activity recognition on the Something-something V2 dataset
Project Page: https://sites.google.com/nvidia.com/conv-tt-lstm
GitHub Page: https://github.com/NVlabs/conv-tt-lstm