# Module: tf.compat.v1.spectral

<br />

Public API for tf.spectral namespace.

## Functions

[`dct(...)`](https://www.tensorflow.org/versions/r2.13/api_docs/python/tf/signal/dct): Computes the 1D \[Discrete Cosine Transform (DCT)\]\[dct\] of `input`.

[`fft(...)`](https://www.tensorflow.org/versions/r2.13/api_docs/python/tf/signal/fft): Fast Fourier transform.

[`fft2d(...)`](https://www.tensorflow.org/versions/r2.13/api_docs/python/tf/signal/fft2d): 2D fast Fourier transform.

[`fft3d(...)`](https://www.tensorflow.org/versions/r2.13/api_docs/python/tf/signal/fft3d): 3D fast Fourier transform.

[`idct(...)`](https://www.tensorflow.org/versions/r2.13/api_docs/python/tf/signal/idct): Computes the 1D \[Inverse Discrete Cosine Transform (DCT)\]\[idct\] of `input`.

[`ifft(...)`](https://www.tensorflow.org/versions/r2.13/api_docs/python/tf/signal/ifft): Inverse fast Fourier transform.

[`ifft2d(...)`](https://www.tensorflow.org/versions/r2.13/api_docs/python/tf/signal/ifft2d): Inverse 2D fast Fourier transform.

[`ifft3d(...)`](https://www.tensorflow.org/versions/r2.13/api_docs/python/tf/signal/ifft3d): Inverse 3D fast Fourier transform.

[`irfft(...)`](https://www.tensorflow.org/versions/r2.13/api_docs/python/tf/signal/irfft): Inverse real-valued fast Fourier transform.

[`irfft2d(...)`](https://www.tensorflow.org/versions/r2.13/api_docs/python/tf/signal/irfft2d): Inverse 2D real-valued fast Fourier transform.

[`irfft3d(...)`](https://www.tensorflow.org/versions/r2.13/api_docs/python/tf/signal/irfft3d): Inverse 3D real-valued fast Fourier transform.

[`rfft(...)`](https://www.tensorflow.org/versions/r2.13/api_docs/python/tf/signal/rfft): Real-valued fast Fourier transform.

[`rfft2d(...)`](https://www.tensorflow.org/versions/r2.13/api_docs/python/tf/signal/rfft2d): 2D real-valued fast Fourier transform.

[`rfft3d(...)`](https://www.tensorflow.org/versions/r2.13/api_docs/python/tf/signal/rfft3d): 3D real-valued fast Fourier transform.