pysptk.sptk.lsp2lpc

pysptk.sptk.lsp2lpc(lsp, has_gain=True, loggain=False, fs=None, itype=0)[source]

LSP to LPC

Parameters:
lpc : array

LPC

has_gain : bool, optional

Whether input LPC has gain at the index 0 or not. Default is True.

loggain : bool, optional

If True, it’s assumed that input LPC has loggain and convert it to linear gain. Default is False.

fs : int, optional

Sampling frequency. Default is None and unused.

itype : int, optional
Input LPC format
  1. normalized frequency (0 ~ pi)
  2. normalized frequency (0 ~ 0.5)
  3. frequency (kHz)
  4. frequency (Hz)

Default is 0.
Returns:
lsp : array, shape (order + 1) if has_gain else (order)

LPC
Raises:
ValueError

if fs is not specified when itype = 2 or 3. if loggain and not has_gain.

See also

pysptk.sptk.lpc2lsp