lpc2cep: LPC to cepstra conversion
In tuneR: Analysis of music and speech

Description Usage Arguments Value Author(s) References See Also Examples

Convert the LPC coefficients in each column of a into frames of cepstra.

1	lpc2cep(a, nout = nrow(a))

`a`	Matrix of LPC coefficients.
`nout`	Number of cepstra to produce.

Matrix of cepstra (one column per time frame).

Sebastian Krey krey@statistik.tu-dortmund.de

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

spec2cep

  testsound <- normalize(sine(400) + sine(1000) + square(250), "16")
  pspectrum <- powspec(testsound@left, testsound@samp.rate)
  aspectrum <- audspec(pspectrum, testsound@samp.rate)
  lpcas <- dolpc(aspectrum$aspectrum, 8)
  cepstra <- lpc2cep(lpcas)

Warning message:
In normalize(sine(400) + sine(1000) + square(250), "16") :
  pcm set to TRUE since unit was one of 8, 16, or 24
There were 50 or more warnings (use warnings() to see the first 50)