mindspore.ops.hann_window

mindspore.ops.hann_window(window_length, periodic=True, *, dtype=None)

Generates a Hann Window.

The Hann window is defined as

$$w(n)=\frac{1}{2}-\frac{1}{2}\cos \left(\frac{2\pi n}{M-1}\right),0\le n\le M-1$$

Parameters

• window_length (int) – Length of window.

• periodic (bool, optional) – When set to True , generates a periodic window for spectral analysis. When set to False , generates a symmetric window for filter design.Default: True .

Keyword Arguments

dtype (mindspore.dtype, optional) – The output window data type, it must be float. Default: None .

Returns

Tensor, a Hann window.

Raises

• TypeError – If window_length is not an integer.

• TypeError – If periodic is not a variable of Boolean type.

• ValueError – If window_length is negative.

Supported Platforms:

Ascend GPU CPU

Examples

>>> from mindspore import ops
>>> window_length = 5
>>> out = ops.hann_window(window_length)
>>> print(out.asnumpy())
[0.        0.3454915 0.9045085 0.9045085 0.3454915]