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Specifications and Common Mistakes

- Specifications and Common Mistakes:

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mindspore.nn.TimeDistributed

class mindspore.nn.TimeDistributed(layer, time_axis, reshape_with_axis=None)

The time distributed layer.

Time distributed is a wrapper which allows to apply a layer to every temporal slice of an input. And the x should be at least 3D. There are two cases in the implementation. When reshape_with_axis provided, the reshape method will be chosen, which is more efficient; otherwise, the method of dividing the inputs along time axis will be used, which is more general. For example, reshape_with_axis could not be provided when deal with Batch Normalization.

Parameters

• layer (Union[Cell, Primitive]) – The Cell or Primitive which will be wrapped.

• time_axis (int) – The axis of time_step.

• reshape_with_axis (int) – The axis which will be reshaped with time_axis. Default: None.

Inputs:

• x (Tensor) - Tensor of shape $(N,T,\ast )$, where $\ast$ means any number of additional dimensions.

Outputs:

Tensor of shape $(N,T,\ast )$

Raises

TypeError – If layer is not a Cell or Primitive.

Supported Platforms:

Ascend GPU CPU

Examples

>>> x = Tensor(np.random.random([32, 10, 3]), mindspore.float32)
>>> dense = nn.Dense(3, 6)
>>> net = nn.TimeDistributed(dense, time_axis=1, reshape_with_axis=0)
>>> output = net(x)
>>> print(output.shape)
(32, 10, 6)