Programmer Guide/SPU Reference/PZTF

PZTF

pole-zero model estimation

Usage:

[SPU PZTF SP DF F0 FMIN FMAX NC IINT NC NN ND IALG OUT F0 ENV C NZ NP F R H E]

Inputs:

Name	Type	Description	Default
SP	vec	log. amplitude spectrum	no default
DF	num	frequency resolution in Hz	no default
F0	num	fundamental frequency in Hz	estimated if not supplied
F1,F2	num	component search range for f0 estimation in Hz	75-4000Hz
NC	num	number of f0 components to use for harmonic mean	5
IINT	num/str	envelope interpolation method (0=Linear, 1=Qaudratic, 2=SPLine)	0=Linear
NN	num	number of numerator coefficients (>0)	no default
ND	num	number of denominator coefficients (>1)	no default
IALG	num/str	pole-zero algorithm (0=WLLS, 1=ND)	1=ND

Out: F0 num fundamental frequency in Hz (input or estimated, 0 for error) ENV vec log. spectrum envelope C vec numerator and denominator coefficients NZ num number of zeros NP num number of poles F vec frequency of zeros and poles R vec radius of zeros and poles H vec log. amplitude response E num error (avr((ENV - H)^2)