nnmnkwii.metrics.melcd

nnmnkwii.metrics.melcd(X, Y, lengths=None)[source]

Mel-cepstrum distortion (MCD).

The function computes MCD for time-aligned mel-cepstrum sequences.

Parameters

  • X (ndarray) – Input mel-cepstrum, shape can be either of (D,), (T x D) or (B x T x D). Both Numpy and torch arrays are supported.

  • Y (ndarray) – Target mel-cepstrum, shape can be either of (D,), (T x D) or (B x T x D). Both Numpy and torch arrays are supported.

  • lengths (list) – Lengths of padded inputs. This should only be specified if you give mini-batch inputs.

Returns

Mean mel-cepstrum distortion in dB.

Return type

float

Note

The function doesn’t check if inputs are actually mel-cepstrum.