Gated Recurrent Unit (GRU)

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A Gated Recurrent Unit (GRU) is a hidden unit that is a sequential memory cell consisting of a reset gate and an update gate but no output gate.



References

2016

2017

2014a

Figure 1: Illustration of (a) LSTM and (b) gated recurrent units. (a) [math]\displaystyle{ i }[/math], [math]\displaystyle{ f }[/math] and [math]\displaystyle{ o }[/math] are the input, forget and output gates, respectively. [math]\displaystyle{ c }[/math] and [math]\displaystyle{ \tilde{c} }[/math] denote the memory cell and the new memory cell content. (b) [math]\displaystyle{ r }[/math] and [math]\displaystyle{ z }[/math] are the reset and update gates, and [math]\displaystyle{ h }[/math] and [math]\displaystyle{ \tilde{h} }[/math] are the activation and the candidate activation.

2014b