April 2017
Intermediate to advanced
318 pages
7h 40m
English
Content preview from Deep Learning with Keras
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Bidirectional RNNs
At a given time step t, the output of the RNN is dependent on the outputs at all previous time steps. However, it is entirely possible that the output is also dependent on the future outputs as well. This is especially true for applications such as NLP, where the attributes of the word or phrase we are trying to predict may be dependent on the context given by the entire enclosing sentence, not just the words that came before it. Bidirectional RNNs also help a network architecture place equal emphasis on the beginning and end of the sequence, and increase the data available for training.
Bidirectional RNNs are two RNNs stacked on top of each other, reading the input in opposite directions. So in our example, one RNN will ...
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