melspectrum
A melspectrum, or mel spectrum, is a spectral representation in which the spectral energy of an audio signal is mapped onto the mel scale using a mel-filterbank. The mel scale is a perceptual scale of pitches that more closely matches human auditory perception, with finer resolution at low frequencies and coarser resolution at higher frequencies.
To compute a melspectrum, an audio signal is typically divided into short frames, a window (such as
The mel spectrum is designed to emulate the auditory processing of the human ear and is widely
Relation to other concepts: applying a discrete cosine transform (DCT) to the log-mel spectrum yields mel-frequency