A Bidirectional GRU, or BiGRU, is a sequence processing model that consists of two GRUs. one taking the input in a forward direction, and the other in a backwards direction. It is a bidirectional recurrent neural network with only the input and forget gates.
Image Source: Rana R (2016). Gated Recurrent Unit (GRU) for Emotion Classification from Noisy Speech.
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