torchaudio.functional.create_dct

torchaudio.functional.create_dct(n_mfcc: int, n_mels: int, norm: Optional[str]) → Tensor

Create a DCT transformation matrix with shape (n_mels, n_mfcc), normalized depending on norm.

Parameters:

• n_mfcc (int) – Number of mfc coefficients to retain

• n_mels (int) – Number of mel filterbanks

• norm (str or None) – Norm to use (either “ortho” or None)

Returns:

The transformation matrix, to be right-multiplied to row-wise data of size (n_mels, n_mfcc).

Return type:

Tensor