PZTF

PZTF

pole-zero model estimation

Usage:

[SPU PZTF SP DF F0 FMIN FMAX NC NN ND IINT 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
NN	num	number of numerator coefficients (>0)	no default
ND	num	number of denominator coefficients (>1)	no default
IINT	num/str	envelope interpolation method (0=Linear, 1=Qaudratic, 2=SPLine)	0=Linear
IALG	num/str	pole-zero algorithm (0=WLLS, 1=ND)	1=ND

Outputs:

Name	Type	Description
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)

See also

<SP-atoms>