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ReverseSequence

Versioned name : ReverseSequence-1

Category : data movement operation

Short description : ReverseSequence reverses variable length slices of data.

Detailed description : ReverseSequence slices input along the dimension specified in the batch_axis, and for each slice i, reverses the first lengths[i] (the second input) elements along the dimension specified in the seq_axis.

Attributes

• batch_axis

  • Description : batch_axis is the index of the batch dimension.

  • Range of values : an integer. Can be negative.

  • Type : int

  • Default value : 0

  • Required : no

• seq_axis

  • Description : seq_axis is the index of the sequence dimension.

  • Range of values : an integer. Can be negative.

  • Type : int

  • Default value : 1

  • Required : no

Inputs :

• 1 : tensor with input data to reverse. Required.

• 2 : 1D tensor populated with integers with sequence lengths in the 1st input tensor. Required.

Example

<layer ... type="ReverseSequence">
    <data batch_axis="0" seq_axis="1"/>
    <input>
        <port id="0">
            <dim>3</dim>
            <dim>10</dim>
            <dim>100</dim>
            <dim>200</dim>
        </port>
        <port id="1">
            <dim>3</dim>
        </port>
     </input>
    <output>
        <port id="2">
            <dim>3</dim>
            <dim>10</dim>
            <dim>100</dim>
            <dim>200</dim>
        </port>
    </output>
</layer>

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