spec2cep: Spectra to Cepstra Conversion

In tuneR: Analysis of music and speech

Description

Calculate cepstra from spectral samples (in columns of spec) through Discrete Cosine Transformation.

Usage

spec2cep(spec, ncep = 12, type = c("t2", "t1", "t3", "t4"))

Arguments

spec	Input spectra (samples/time frames in columns).
ncep	Number of cepstra to return.
type	DCT Type.

Value

cep	Matrix of resulting cepstra.
dctm	Returns the DCT matrix that spec was multiplied by to give cep.

Author(s)

Sebastian Krey [e-mail]

References

Daniel P. W. Ellis: http://www.ee.columbia.edu/~dpwe/resources/matlab/rastamat/

See Also

lpc2cep

Examples

  testsound <- normalize(sine(400) + sine(1000) + square(250), "16")
  pspectrum <- powspec(testsound@left, [e-mail])
  aspectrum <- audspec(pspectrum, [e-mail])
  cepstra <- spec2cep(aspectrum$aspectrum)

Example output

Warning message:
In normalize(sine(400) + sine(1000) + square(250), "16") :
  pcm set to TRUE since unit was one of 8, 16, or 24

tuneR documentation built on May 2, 2019, 6:15 p.m.