Digital Signal Processing Chapter 7: Parametric Spectrum Estimation

• calculation of the power spectrum density after n stepscalculate iteratively n (z) = 1 +n∑â n,ν · z −ν und ˆσ n 2 →ν=1Ŝ ARXX(e jΩ ) =ˆσ n2| n (e jΩ )| = ˆσ n22 ∑|1 + n â n,ν e −jνΩ | 2• An iterative construction of the polynomial A n (z) has only been done to calculate thepower spectrum density. If the PARCOR coefficients have to be calculated – i.e. tobuild a synthesis filter for speech synthesis – A n (z) is not necessary; especially if asynthesis filter uses the lattice structure (e.g. GSM speech decoder).ν=1Burg algorithm Page 35