GRUCell

Versioned name: GRUCell-3

Category: Sequence processing

Short description: GRUCell represents a single GRU Cell that computes the output using the formula described in the paper.

Attributes

• hidden_size
  • Description: hidden_size specifies hidden state size.
  • Range of values: a positive integer
  • Type: int
  • Default value: None
  • Required: yes
• activations
  • Description: activation functions for gates
  • Range of values: any combination of relu, sigmoid, tanh
  • Type: a list of strings
  • Default value: sigmoid,tanh
  • Required: no
• activations_alpha, activations_beta
  • Description: activations_alpha, activations_beta functions attributes
  • Range of values: a list of floating-point numbers
  • Type: float[]
  • Default value: None
  • Required: no
• clip
  • Description: clip specifies value for tensor clipping to be in [-C, C] before activations
  • Range of values: a positive floating-point number
  • Type: float
  • Default value: infinity that means that the clipping is not applied
  • Required: no
• linear_before_reset
  • Description: linear_before_reset flag denotes if the layer behaves according to the modification of GRUCell described in the formula in the ONNX documentation.
  • Range of values: True or False
  • Type: boolean
  • Default value: False
  • Required: no

Inputs

• 1: X - 2D tensor of type T [batch_size, input_size], input data. Required.
• 2: initial_hidden_state - 2D tensor of type T [batch_size, hidden_size]. Required.
• 3: W - 2D tensor of type T [3 * hidden_size, input_size], the weights for matrix multiplication, gate order: zrh. Required.
• 4: R - 2D tensor of type T [3 * hidden_size, hidden_size], the recurrence weights for matrix multiplication, gate order: zrh. Required.
• 5: B - 1D tensor of type T. If linear_before_reset is set to 1, then the shape is [4 * hidden_size] - the sum of biases for z and r gates (weights and recurrence weights), the biases for h gate are placed separately. Otherwise the shape is [3 * hidden_size], the sum of biases (weights and recurrence weights). Required.

Outputs

• 1: Ho - 2D tensor of type T [batch_size, hidden_size], the last output value of hidden state.

Types

• T: any supported floating point type.

Example

<layer ... type="GRUCell" ...>
    <data hidden_size="128" linear_before_reset="1"/>
    <input>
        <port id="0">
            <dim>1</dim>
            <dim>16</dim>
        </port>
        <port id="1">
            <dim>1</dim>
            <dim>128</dim>
        </port>
         <port id="2">
            <dim>384</dim>
            <dim>16</dim>
        </port>
         <port id="3">
            <dim>384</dim>
            <dim>128</dim>
        </port>
         <port id="4">
            <dim>768</dim>
        </port>
    </input>
    <output>
        <port id="5">
            <dim>1</dim>
            <dim>128</dim>
        </port>
    </output>
</layer>