neural-networkdeep-learninglstmrecurrent-neural-network
How many are LSTM Gates?
It is very confusing while googling for LSTM gates , I find that some references and articles say that they are three gates: input , forget and output gates , While others say that they are four gates : learn , forget , remember, and use gate ?
So, what is the right ?
Solution
There are four gates: input modulation gate, input gate, forget gate and output gate, representing four sets of parameters.
We can see that there are four sets of parameters(8 matrices) colored in blue in the below graph of LSTM where f stands for the forget gate, g and i the add gate, o the output gate. Since the add gate needs two sets of parameters we can combine them as just one gate.
Reference:
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