Recurrent Dropout without Memory Loss

Understand

This paper presents a novel approach to recurrent neural network (RNN) regularization.

• Differently from the widely adopted dropout method, which is applied to \textit{forward} connections of feed-forward architectures or RNNs, we propose to drop neurons directly in \textit{recurrent} connections in a way that does not cause loss of long-term memory.
• Our approach is as easy to implement and apply as the regular feed-forward dropout and we demonstrate its effectiveness for Long Short-Term Memory network, the most popular type of RNN cells.
• Our experiments on NLP benchmarks show consistent improvements even when combined with conventional feed-forward dropout.