tf.signal.irfft | TensorFlow v2.16.1 (original) (raw)
tf.signal.irfft
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Inverse real-valued fast Fourier transform.
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tf.compat.v1.signal.irfft, tf.compat.v1.spectral.irfft
tf.signal.irfft(
input_tensor, fft_length=None, name=None
)
Computes the inverse 1-dimensional discrete Fourier transform of a real-valued signal over the inner-most dimension of input_tensor.
The inner-most dimension of input_tensor is assumed to be the result of RFFT: thefft_length / 2 + 1 unique components of the DFT of a real-valued signal. Iffft_length is not provided, it is computed from the size of the inner-most dimension of input_tensor (fft_length = 2 * (inner - 1)). If the FFT length used to compute input_tensor is odd, it should be provided since it cannot be inferred properly.
Along the axis IRFFT is computed on, if fft_length / 2 + 1 is smaller than the corresponding dimension of input_tensor, the dimension is cropped. If it is larger, the dimension is padded with zeros.
| Args | |
|---|---|
| input | A Tensor. Must be one of the following types: complex64, complex128. A complex tensor. |
| fft_length | A Tensor of type int32. An int32 tensor of shape [1]. The FFT length. |
| name | A name for the operation (optional). |
| Returns |
|---|
| A Tensor of type Treal. |