Struct Mfcc 

pub struct Mfcc {
    pub n_coeffs: usize,
    pub sample_rate: f32,
    pub fft_size: usize,
    pub n_mel: usize,
    /* private fields */
}

Mel-Frequency Cepstral Coefficient computation.

Fields

n_coeffs: usize

sample_rate: f32

fft_size: usize

n_mel: usize

Implementations

impl Mfcc

pub fn new(n_coeffs: usize, fft_size: usize, sample_rate: f32) -> Self

pub fn compute( &self, signal: &[f32], _sample_rate: f32, n_coeffs: usize, ) -> Vec<f32>

Compute MFCCs for a signal block.

pub fn dct_ii(input: &[f32], n_coeffs: usize) -> Vec<f32>

DCT type-II: N input → n_coeffs output.

pub fn idct_ii(coeffs: &[f32], n_out: usize) -> Vec<f32>

Inverse DCT type-II.

pub fn delta(features: &[Vec<f32>]) -> Vec<Vec<f32>>

Compute delta (first-order difference) of a feature matrix (rows = frames).