Signal Processing Toolbox™

lsf2poly

Convert line spectral frequencies to prediction filter coefficients

Syntax

a = lsf2poly(lsf)

Description

a = lsf2poly(lsf) returns a vector a containing the prediction filter coefficients from the vector lsf of line spectral frequencies. If lsf is a matrix of size MxN with separate channels of line spectral frequencies in each column, the returned a matrix has the resulting prediction filter coefficients in rows and is of size Nx(M+1).

Examples

lsf = [0.7842    1.5605    1.8776    1.8984    2.3593];
a = lsf2poly(lsf)
a =
    1.0000   0.6148   0.9899   0.0001   0.0031  -0.0081

References

[1] Deller, J.R., J.G. Proakis, and J.H.L. Hansen, Discrete-Time Processing of Speech Signals, Prentice-Hall, 1993.

[2] Rabiner, L.R., and R.W. Schafer, Digital Processing of Speech Signals, Prentice-Hall, 1978.

See Also

ac2poly, poly2lsf, rc2poly

lpc

mag2db