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 a vector lsf of line spectral frequencies (also known as line spectrum pairs).

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

See Also

ac2poly	Convert autocorrelation parameters to prediction filter coefficients.
poly2lsf	Convert prediction filter coefficients to line spectral frequencies.
rc2poly	Convert reflection coefficients to prediction filter coefficients.

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.

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